AMS Sectional Meeting Full Program
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1989 Central Section Meeting
Chicago, IL, May 1920, 1989
Meeting #849
Associate secretaries:
Andy R Magid, AMS
amagid@ou.edu
Friday May 19, 1989

Friday May 19, 1989, 6:30 a.m.9:50 a.m.
Special Session on Sequence Spaces and Summability, I
Room 339, Damen Hall

6:30 a.m.
BH envelopes and BH completions of NH spaces.
Jeff Connor*, Ohio University, Athens
W. E. Kaufman, Ohio University, Athens
(8494675)

7:00 a.m.
The role of the sequence space phi in the theory of barrelled spaces.
P. P. Narayanaswami*, Memorial University of Newfoundland
(84946165)

7:30 a.m.
Some properties of absolute summability domains.
M. S. Macphail*, Carleton University
C. Orhan, University of Ankara, Turkey
(8494018)

8:00 a.m.
Sequences of regular summability methods.
Casper Goffman*, Purdue University, West Lafayette
(8494002)

8:30 a.m.
FKproducts, E superior beta beta and uniformly convergent Fourier series.
G\"unther W. Goes*, University of Stuttgart, Federal Republic of Germany
(84940104)

9:00 a.m.
A question concerning selfdual Hilbert Kspaces.
A. K. Snyder*, Lehigh University
(8494037)

9:30 a.m.
Absolute Norlund matrix summability of Fourier series based on inclusion theorems.
Brian Kuttner, University of Birmingham, England
Billy E. Rhoades*, Indiana University
(84940129)

Friday May 19, 1989, 7:00 a.m.9:50 a.m.
Special Session on Geometric Topology, I
Room 641, Damen Hall

7:00 a.m.
Eta invariants of hyperbolic 3manifolds.
Walter D. Neumann*, Ohio State University, Columbus
Robert Meyerhoff, Boston University
(8495721)

7:30 a.m.
Some new 4manifolds.
Selman Akbulut*, Michigan State University
(84957234)

8:00 a.m.
Some simple fake 4manifolds.
Robert E. Gompf*, University of Texas, Austin
(8495781)

8:30 a.m.
Representation spaces of Seifert fibered homology spheres.
Paul Kirk*, California Institute of Technology
Eric Klassen, California Institute of Technology
(8495772)

9:00 a.m.
Instanton polynomials for homology three spheres.
Ronald J. Stern*, University of Utah
Ronald Fintushel, Michigan State University
(84957127)

9:30 a.m.
Realization of group actions on 4manifolds.
Allan L. Edmonds*, Indiana University, Bloomington
John H. Ewing, Indiana University, Bloomington
(8495799)

Friday May 19, 1989, 7:00 a.m.9:50 a.m.
Special Session on Quadratic Forms and Real Algebraic Geometry, I
Room 342, Damen Hall

7:00 a.m.
Sums of squares in Witt rings.
D. W. Lewis*, University College of Dublin, Republic of Ireland
(84911168)

7:30 a.m.
Witt kernels of algebraic extensions.
David B. Leep*, University of Kentucky
(84912142)

8:00 a.m.
On the structure of the Clifford algebra over a commutative ring.
Alexander J. Hahn*, University of Notre Dame
(8491513)

8:30 a.m.
Galois groups over Cfields.
Tara L. Smith*, Ohio State University, Columbus
J\'an Min\'a\v c, University of Western Ontario
(8491232)

9:00 a.m.
Informal Discussion

9:30 a.m.
Picard groups of Witt rings.
Robert W. Fitzgerald*, Southern Illinois University, Carbondale
(84911110)

Friday May 19, 1989, 7:30 a.m.9:50 a.m.
Special Session on Codes and Designs, I
Room 149, Damen Hall

7:30 a.m.
On smallest Latin square graphs with given automorphism group.
William C. Arlinghaus*, Lawrence Institute of Technology
(8490557)

8:00 a.m.
Isomorphisms of objects over a finite field.
Hong Goo Park*, University of North Texas
(84905132)

8:30 a.m.
Partition lattices and experimental design.
Jay H. Beder*, University of Wisconsin, Milwaukee
(8490689)

9:00 a.m.
Designs admitting affine linear maps as automorphisms.
Neal Brand*, University of North Texas
Somporn Sutinuntopas, Ramkamhaeng University, Thailand
(84905158)

9:30 a.m.
Character tables of commutative association schemes and the study of their subschemes.
Eiichi Bannai*, Ohio State University, Columbus
(84905252)

Friday May 19, 1989, 8:00 a.m.9:50 a.m.
Special Session on Noncommutative Ring Theory, I
Room 730, Damen Hall

8:00 a.m.
Inner gradings and Galois extensions with normal basis.
Margaret Beattie*, Mount Allison University
(8491650)

8:30 a.m.
Some 3dimensional skew polynomial rings.
Allen D. Bell*, University of Wisconsin, Milwaukee
S. Paul Smith, University of Washington
(84916125)

9:00 a.m.
Verbally prime P.I. algebras.
Allan Berele*, DePaul University
(84916123)

9:30 a.m.
Delta methods in enveloping rings.
Jeffrey M. Bergen*, DePaul University
D. S. Passman, University of Wisconsin, Madison
(84916124)

Friday May 19, 1989, 8:00 a.m.9:50 a.m.
Special Session on Numerical Methods in Harmonic Analysis, I
Room 238, Damen Hall

8:00 a.m.
Fast wavelet transforms in numerical analysis and potential theory. I.
G. Beylkin*, Yale University
R. Coifman, Yale University
V. Rokhlin, Yale University
(84965196)

8:30 a.m.
Informal Discussion

9:30 a.m.
Fast wavelet transforms in numerical analysis and potential theory. II.
G. Beylkin, Yale University
R. Coifman*, Yale University
V. Rokhlin, Yale University
(84965197)

Friday May 19, 1989, 8:00 a.m.9:50 a.m.
Special Session on KazhdanLusztig Theory and Related Topics, I
Room 441, Damen Hall

8:00 a.m.
The proof of the KazhdanLusztig conjecture revisited.
Leonard Scott*, University of Virginia
S. Roan, Clark University
(84920180)

8:30 a.m.
An approach to the KazhdanLusztig conjecture for KacMoody algebras.
Luis Casian*, Ohio State University, Columbus
(84922146)

9:00 a.m.
Multiplicity free categories of highest weight representations. I.
Brian D. Boe*, University of Georgia
David H. Collingwood, University of Washington
(84917215)

9:30 a.m.
Systems of differential operators and unitary highest weight modules.
Thomas J. Enright*, University of California at San Diego, La Jolla
(84917150)

Friday May 19, 1989, 8:00 a.m.9:50 a.m.
Special Session on Algebraic Groups and Related Topics, I
Room 440, Damen Hall

8:00 a.m.
Reflection representations of Hecke algebras of certain Weyl groups.
Hemant Kumar Tiwari*, University of Chicago
(84920209)

8:30 a.m.
Algebraic properties of Kloosterman sums for Chevalley groups.
Romuald Dabrowski*, Indiana University, Bloomington
(8492092)

9:00 a.m.
A geometric presentation of the lambda sub 2 module of C sub n (q).
Steve M. Cohen*, University of Illinois, Chicago
(84920254)

9:30 a.m.
Rings of invariants for maximal unipotent subgroups.
Frank D. Grosshans*, West Chester University of Pennsylvania
(8492038)

Friday May 19, 1989, 8:00 a.m.9:50 a.m.
Special Session on Arithmetic Geometry and Intersection Theory, I
Room 530, Damen Hall

8:00 a.m.
The arithmetic RiemannRoch theorem.
Christophe Soul\'e*, Institut des Hautes \'Etudes Scientifiques, and Centre National de la Recherche Scientifique, France
(8491166)

8:30 a.m.
Discussion

9:00 a.m.
Green's functions on nonarchimedean Riemann surfaces.
Ernst Kani*, Queen's University
(84911255)

9:30 a.m.
Discussion

Friday May 19, 1989, 8:00 a.m.9:50 a.m.
Special Session on Recursion Theory, I
Room 529, Damen Hall

8:00 a.m.
Separating jump classes in the r.e. degrees I: Working below a low sub 2 r.e. degree.
Richard A. Shore*, Cornell University
Theodore A. Slaman, University of Illinois, Chicago
(8490388)

8:30 a.m.
Working below a high recursively enumerable degree.
Richard A. Shore, Cornell University
Theodore A. Slaman*, University of Chicago
(84903108)

9:00 a.m.
Some results on the structure of the Sigma sub 2 enumeration degrees.
Seema Ahmad*, Simon Fraser University
(8490397)

9:30 a.m.
Homogeneous countable models of tame theories.
Terrence Millar*, University of Wisconsin, Madison
(8490385)

Friday May 19, 1989, 8:00 a.m.9:00 a.m.
Special Session on Partial Differential Equations, I
Room 239, Damen Hall

8:00 a.m.
Isolated singularities of pharmonic functions on the plane.
E. Dibenedetto, Northwestern University
J. Manfredi*, Northwestern University
(8493535)

8:40 a.m.
On certain partial differential operators of odd finite type.
Alexandrou A. Himonas*, Princeton University
(8493543)

Friday May 19, 1989, 8:00 a.m.9:55 a.m.
Session on General Session
Room 148, Damen Hall

8:00 a.m.
Representation of invariant nonstandard hulls in internal set theory.
Nader Vakil*, Western Illinois University
(84903190)

8:15 a.m.
Topological compactness and the axiom of choice. II.
Paul E. Howard*, Eastern Michigan University
(84903210)

8:30 a.m.
Free sets for nowhere dense set maps on the generalized linear continua.
Kandasamy Muthuvel*, University of Wisconsin, Oshkosh
(8490470)

8:45 a.m.
On C infinitywords.
W. D. Weakley*, Indiana UniversityPurdue University, Ft.\ Wayne
(8490516)

9:00 a.m.
Fibonacci numbers and Pythagorean triangles of equal areas.
Malvina Baica*, University of Wisconsin, Whitewater
(8491120)

9:15 a.m.
Base change for PSL(2).
David Joyner*, United States Naval Academy
(84911269)

9:30 a.m.
Integral domains whose set of prime ideals is coprimely packed.
Vahap Erdogdu*, Middle East Technical University, Ankara, Turkey
(84913258)

9:45 a.m.
Dimensions of modules.
John Dauns*, Tulane University
(84999272)

Friday May 19, 1989, 10:00 a.m.10:50 a.m.
Invited Address

Friday May 19, 1989, 12:30 p.m.1:20 p.m.
Invited Address
Analogies between function fields and number fields.
Auditorium, Flanner Hall
Henri Gillet*, University of Illinois, Chicago
(84914181)

Friday May 19, 1989, 1:30 p.m.5:20 p.m.
Special Session on Sequence Spaces and Summability, II
Room 339, Damen Hall

1:30 p.m.
Sequence transformations that guarantee a given rate of convergence.
G. H. Fricke, Wright State University, Dayton
J. A. Fridy*, Kent State University, Kent
(8494056)

2:00 p.m.
Coin tossing and moment sequences.
Grahame Bennett*, Indiana University, Bloomington
(8494010)

2:30 p.m.
Asymptotic relationships between Dirichlet series.
David Borwein*, University of Western Ontario
(8494084)

3:00 p.m.
Some distinguished subsets of FKspaces containing phi.
Wolfgang Beekmann, Fern Universitat Hagen, Federal Republic of Germany
ShaoChien Chang*, Brock University
(84940106)

3:30 p.m.
The gliding humps property of the factor sequences and the weakly sequential completeness of the betadual of a sequence space.
Johann Boos*, Fern Universitat, Hagen, Federal Republic of Germany
(84946175)

4:00 p.m.
Bounded consistency on strong summability fields.
C. S. Chun, Simon Fraser University
Allen R. Freedman*, Simon Fraser University
(84940202)

4:30 p.m.
Full families and sequential completeness.
John J. Sember*, Simon Fraser University
(84940141)

5:00 p.m.
Sequence spaces and summability.
George U. Brauer*, University of Minnesota, Minneapolis
(8494007)

Friday May 19, 1989, 2:00 p.m.5:20 p.m.
Special Session on Noncommutative Ring Theory, II
Room 730, Damen Hall

2:00 p.m.
Rings all of whose Pierce stalks are weakly local.
Douglas G. Burkholder*, Wichita State University
(84916242)

2:30 p.m.
Semiprime crossed products.
William Chin*, DePaul University
(84916118)

3:00 p.m.
When is the Clifford algebra of a binary cubic form split?
Darrell Haile*, Indiana University, Bloomington
(84916120)

3:30 p.m.
Quantum Kleinian singularities.
Timothy J. Hodges*, University of Cincinnati
(84916121)

4:00 p.m.
A characterization of uniserial rings via continuous modules.
S. K. Jain*, Ohio University, Athens
S. R. LopezPermouth, Ohio University, Athens
S. Tariq Rizvi, Ohio State University, Lima
(8491669)

4:30 p.m.
Informal Discussion

5:00 p.m.
Splitters and relative homological algebra.
Mark Kleiner*, Syracuse University
Aboubakr Lbekkouri, Universite de Mohammed V, Morocco
(8491649)

Friday May 19, 1989, 2:00 p.m.5:20 p.m.
Special Session on Geometric Topology, II
Room 641, Damen Hall

2:00 p.m.
Cutting and pasting and the eta invariant.
Daniel Ruberman*, Brandeis University
Robert Meyerhoff, Boston University
(8495767)

2:30 p.m.
On Milnor's invariants and the concordance classification of links.
Nathan Habegger*, University of Georgia
XiaoSong Lin, Columbia University
(84957247)

3:00 p.m.
Homology boundary links, AndrewsCurtis conjecture and the Hawaiian earrings space.
Tim D. Cochran*, Northwestern University
(84957237)

3:30 p.m.
Cochran's link invariants and Massey products.
Kent Orr*, University of Chicago
(84957240)

4:00 p.m.
Surgery invariants of link cobordism.
Lawrence J. Smolinsky*, Louisiana State University, Baton Rouge
(84957100)

4:30 p.m.
Studying links via closed braids. II.
William W. Menasco*, State University of New York, Buffalo
Joan S. Birman, Columbia University
(84957236)

5:00 p.m.
Spherical space forms and Dehn surgery.
Steven A. Bleiler*, Portland State University
(84957235)

Friday May 19, 1989, 2:00 p.m.3:50 p.m.
Special Session on Numerical Methods in Harmonic Analysis, II
Room 238, Damen Hall

2:00 p.m.
The phitransform and applications to computer graphics.
Anca Deliu, University of Georgia
Bj\"orn Jawerth*, University of South Carolina, Columbia
(84942212)

2:30 p.m.
Local extrema of a wavelet transform.
Stephane Mallat*, Courant Institute of Mathematical Sciences, New York University
(84942195)

3:00 p.m.
Atomic decompositions and nonlinear approximation.
Ronald A. DeVore*, University of South Carolina, Columbia
Bj\"orn Jawerth, University of South Carolina, Columbia
Vasil Popov, Bulgarian Academy of Science, Sofia, Bulgaria
(84965107)

3:30 p.m.
Generalized sampling and TriebelLizorkin spaces.
Bj\"orn Jawerth, University of South Carolina, Columbia
Grant V. Welland*, University of Missouri, St.\ Louis
(84942220)

Friday May 19, 1989, 2:00 p.m.4:50 p.m.
Special Session on KazhdanLusztig Theory and Related Topics, II
Room 441, Damen Hall

2:00 p.m.
Geometry and combinatorics of Schubert varieties.
V. Lakshmibai*, Northwestern University
(84914153)

2:30 p.m.
A connection of equivariant Ktheory with the singularity of Schubert varieties.
Shrawan Kumar*, Institute for Advanced Study and Tata Institute of Fundamental Research, Bombay, India
(84920152)

3:00 p.m.
Loop groups, the Schubert calculus and the principal nilpotent.
Dale H. Peterson*, University of British Columbia
(84922157)

3:30 p.m.
Frobenius action on the Bcohomology.
Olivier Mathieu*, Universit\'e de Paris 7, France
(84920154)

4:00 p.m.
Schubert varieties in Hermitian symmetric spaces.
Erhard Neher*, University of Ottawa
(84920155)

4:30 p.m.
Hyperalgebras, highest weight categories and finite dimensional algebras.
Brian Parshall*, University of Virginia
(84920156)

Friday May 19, 1989, 2:00 p.m.4:20 p.m.
Special Session on Algebraic groups and related topics, II
Room 440, Damen Hall

2:00 p.m.
On the structure of parabolic subgroups.
Hassan Azad, QuaidiAzam University, Islamabad, Pakistan
Michael Barry*, Allegheny College
Gary Seitz, University of Oregon
(8492053)

2:30 p.m.
Decomposition numbers of SP(4,q) for primes dividing q+1.
Donald L. White*, University of Illinois, Chicago
(8492052)

3:00 p.m.
Some connections between MG and Srepresentions.
Leonid Krop*, DePaul University
(8492005)

3:30 p.m.
Invariant theory of regular subgroups.
Lin Tan*, Indiana University, Bloomington
(84920248)

4:00 p.m.
On the symmetric powers of the natural representation of groups of classical types.
Jyrki Lahtonen*, University of Notre Dame
(84922178)

Friday May 19, 1989, 2:00 p.m.4:50 p.m.
Special Session on Arithmetic Geometry and Intersection Theory, II
Room 530, Damen Hall

2:00 p.m.
Algebraic points on curves of genus greater than one.
Paul Vojta*, University of California, Berkeley
(84911259)

2:30 p.m.
Discussion

3:00 p.m.
Faltings's metrics on cohomology.
William G. McCallum*, University of Arizona
(84914230)

3:30 p.m.
Discussion

4:00 p.m.
Potential theory on arithmetic curves.
David Harbater*, University of Pennsylvania
(8491465)

4:30 p.m.
Discussion

Friday May 19, 1989, 2:00 p.m.3:50 p.m.
Special Session on Recursion Theory, II
Room 529, Damen Hall

2:00 p.m.
Universes for 3E.
Gerald E. Sacks*, Harvard University and Massachusets Institute of Technology
(84903109)

2:30 p.m.
The structure of degrees uniform under different equivalence relations.
Hong Ye*, University of California, Santa Barbara
(8490347)

3:00 p.m.
Priority arguments and Sigma sub 2induction.
Marcia J. Groszek*, Dartmouth College
(84903171)

3:30 p.m.
Polytime mathematics and logic.
Anil Nerode*, Cornell University
(8490394)

Friday May 19, 1989, 2:00 p.m.4:50 p.m.
Special Session on Codes and Designs, II
Room 149, Damen Hall

2:00 p.m.
On the problem of constructing binary constant weight codes.
N. J. A. Sloane*, AT&T Bell Laboratories, Murray Hill, New Jersey
(84994229)

2:30 p.m.
Designs characterized by codes.
J. D. Key*, Clemson University
(84951161)

3:00 p.m.
Affine planes from codes.
E. F. Assmus, Jr.*, Lehigh University
(84951162)

3:30 p.m.
Decompositions of designs and codes.
K. T. Phelps*, Auburn University, Auburn
(84905193)

4:00 p.m.
Code automorphism group algorithms.
Jeffrey S. Leon*, University of Illinois, Chicago
(84905262)

4:30 p.m.
A coalgebra structure for a class of twodimensional cyclic product codes.
Jerry Goldman*, DePaul University
(8499425)

Friday May 19, 1989, 2:00 p.m.4:20 p.m.
Special Session on Algebraic Topology of Varieties, I
Room 531, Damen Hall

2:00 p.m.
Topological types of isolated twodimensional hypersurface singularities and Zariski multiplicity problem.
Stephen ST. Yau*, University of Illinois, Chicago
(8495595)

2:30 p.m.
Applications of mixed Hodge theory to the topology of complex varieties.
Alan H. Durfee*, Mount Holyoke College
(8491493)

3:00 p.m.
Casson invariant of links of surface singularities.
Walter D. Neumann*, Ohio State University, Columbus
Jonathan Wahl, University of North Carolina, Chapel Hill
(8495723)

3:30 p.m.
Complex structure on K\"ahler manifolds.
Anatoly S. Libgober, University of Illinois, Chicago
John W. Wood*, University of Illinois, Chicago
(8495787)

4:00 p.m.
The Riccati flow and singularities of Schubert varieties.
James S. Wolper*, Hamilton College
(8491468)

Friday May 19, 1989, 2:00 p.m.4:20 p.m.
Special Session on Partial Differential Equations, II
Room 239, Damen Hall

2:00 p.m.
Singular solutions of the equation  Delta u = lambda e superior u.
Hamid Bellout*, Northern Illinois University
(8493545)

2:40 p.m.
Uniqueness in the Cauchy problem and weakly pseudoconvex initial surfaces.
Xavier SaintRaymond*, Purdue University, West Lafayette
(84935111)

3:20 p.m.
A global attractor for a reactiondiffusion system arising from climate modeling.
Georg Hetzer*, Auburn University, Auburn
Paul Guenter Schmidt, Auburn University, Auburn
(8493560)

4:00 p.m.
A parametrix for the overline partialNeumann problem.
Kyoko Kimura*, University of South Carolina, Columbia
(8493542)

Friday May 19, 1989, 2:00 p.m.4:50 p.m.
Special Session on Quadratic Forms and Real Algebraic Geometry, II
Room 342, Damen Hall

2:00 p.m.
A supinfpolynomially varying solution to Hilbert's $17$th problem.
Charles N. Delzell*, Louisiana State University, Baton Rouge
(84914160)

2:30 p.m.
Places on *fields and the real holomorphy ring.
Thomas C. Craven*, University of Hawaii, Honolulu
(8491226)

3:00 p.m.
Orders and order closures for not necessarily formally real fields.
Ron Brown*, University of Hawaii, Honolulu
(84912113)

3:30 p.m.
Witt rings and spaces of orderings of projective planes.
Franz Kalhoff*, University of Dortmund, Federal Republic of Germany
(84911203)

4:00 p.m.
Signatures of higher level on rings with many units.
M. Marshall, University of Saskatchewan
L. Walter*, University of Saskatchewan
(8491319)

4:30 p.m.
Higher level orders on noncommutative rings.
Victoria A. Powers*, Emory University
(84906177)

Friday May 19, 1989, 2:00 p.m.4:50 p.m.
Special Session on Nonlinear Analysis and its Applications, I
Room 340, Damen Hall

2:00 p.m.
A common fixed point theorem in metric spaces with normal structure.
M. A. Khamsi*, University of Rhode Island
(84946243)

2:30 p.m.
Eigenvectors and fixed points for superlinear maps.
Mario Martelli*, California State University, Fullerton
(84946105)

3:00 p.m.
Degree theory for some semilinear equations and applications to wave equations.
Juha Berkovits, University of Oulu, Finland
Vesa Mustonen*, University of Oulu, Finland
(8493598)

3:30 p.m.
Bivariational and singular variational derivatives.
M. Zuhair Nashed*, University of Delaware
(84949227)

4:00 p.m.
Generalized BrouwerKakutani type fixed point theorems.
Sehie Park*, Seoul National University, Korea and MSRI, Korea,
(8494633)

4:30 p.m.
Some generalizations of the MeirKeeler type contraction maps.
Billy E. Rhoades*, Indiana University, Bloomington
Sehie Park, Seoul National University, Korea
Kwon Bae Moon, San Myung Women's University, Korea
(8494755)

Friday May 19, 1989, 2:00 p.m.4:40 p.m.
Session on General Session
Room 148, Damen Hall

2:00 p.m.
Fake generic splitting fields.
James K. Deveney*, Virginia Commonwealth University
Joe Yanik, Virginia Commonwealth University
(84912103)

2:15 p.m.
Zero cycles and generalized Albanese varieties.
Hur\c sit \"Onsiper*, Middle East Technical University, Ankara, Turkey
(84914187)

2:30 p.m.
On glueing affine varieties.
Khomo T. S. Mohapeloa*, Pennsylvania State University, McKeesport
(84914219)

2:45 p.m.
The spherical spectrum of a graded ring.
Hasan Yousef*, Lehigh University
Gilbert Stengle, Lehigh University
(84914221)

3:00 p.m.
A characterization of spaces of closest fit.
Seymour Kass*, University of Massachusetts, Boston
(84915226)

3:15 p.m.
Correspondence theorems for endomorphism rings of modules.
Khuri Soumaya*, East Carolina University
(8491696)

3:30 p.m.
Some properties of higher order derivatives.
P. S. Bullen*, University of British Columbia
S. N. Mukhopadhyay, Burdwan University, West Bengal, India
(84926211)

3:45 p.m.
On an extension of the Lebesgue measure.
Jerzy Filus*, Illinois Institute of Technology
(84928182)

4:00 p.m.
Constructing a pair of pants.
Ara Basmajian*, University of Oklahoma
(84930138)

4:15 p.m.
A Picard theorem for projective varieties.
Peter Hall*, Washington University
(8493230)

4:30 p.m.
A two point connection problem for a certain ordinary linear homogeneous differential equation.
T. K. Puttaswamy*, Ball State University
(8493412)
Saturday May 20, 1989

Saturday May 20, 1989, 6:30 a.m.9:50 a.m.
Special Session on Sequence Spaces and Summability, III
Room 339, Damen Hall

6:30 a.m.
Types P and P superior * sequence spaces.
Lee Baric*, Dickinson College
(8494058)

7:00 a.m.
Positive matrix operators between Koethe sequence spaces.
William H. Ruckle*, Clemson University
(8494004)

7:30 a.m.
The betadual of FKspaces. II.
J. C. Magee*, State University of New York, College at Potsdam
(84940184)

8:00 a.m.
Matrix methods of BohrHardy type.
J. V. DeFranza*, St Lawrence University
(84940185)

8:30 a.m.
Summability factors on a class of methods of BohrHardy type.
D. J. Fleming*, St Lawrence University
A. Peyerimhoff, Universit\"at Ulm, Federal Republic of Germany
(84940183)

9:00 a.m.
Limited sets and c sub 0 and some other stuff.
Joseph Diestel*, Kent State University, Kent
(8494601)

9:30 a.m.
Toeplitz bases in matrix fields.
Amnon Jakimovski*, TelAviv University, Israel
(84940253)

Saturday May 20, 1989, 7:00 a.m.9:50 a.m.
Special Session on Noncommutative Ring Theory, III
Room 730, Damen Hall

7:00 a.m.
Minimal differential identities in prime rings with involution.
Charles Lanski*, University of Southern California
(84916122)

7:30 a.m.
Rings of differential operators over rational affine curves.
Gail Letzter*, Wayne State University
Leonid MakarLimanov, Wayne State University
(84916205)

8:00 a.m.
Roiter's and Drozd's theorems in dimension 1.
Robert M. Guralnick*, University of Southern California
Lawrence S. Levy, University of Wisconsin, Madison
(84916144)

8:30 a.m.
Trace functions in the rings of fractions of polycyclic group rings.
A. I. Lichtman*, University of Wisconsin, Parkside
(84916208)

9:00 a.m.
On the global dimension of fixed rings.
Martin Lorenz*, Northern Illinois University
(84916119)

9:30 a.m.
Automorphism groups of the universal enveloping algebras of generalposition finite dimensional Lie algebras.
Leonard G. MakarLimanov*, Wayne State University
(84916206)

Saturday May 20, 1989, 7:00 a.m.9:50 a.m.
Special Session on Geometric Topology, III
Room 641, Damen Hall

7:00 a.m.
Studying links via closed braids. I.
Joan S. Birman*, Columbia University
William W. Menasco, State University of New York, College at Buffalo
(84957231)

7:30 a.m.
Cutting and pasting and the ChernSimons invariant.
Robert Meyerhoff*, Boston University
Daniel Ruberman, Brandeis University
(8495382)

8:00 a.m.
On links as obstructions to free reduction.
R. Craggs*, University of Illinois, UrbanaChampaign
(8495780)

8:30 a.m.
Masses of moduli spaces of punctured surfaces.
R. C. Penner*, University of Southern California
(8495191)

9:00 a.m.
One fixed point actions on lowdimensional spheres.
N. P. Buchdahl, Tulane University
Slawomir Kwasik*, Tulane University
Reinhard Schultz, Purdue University, West Lafayette
(84957102)

9:30 a.m.
Pin structures on manifolds.
Laurence R. Taylor*, University of Notre Dame
(84957137)

Saturday May 20, 1989, 7:00 a.m.9:50 a.m.
Special Session on Codes and Designs, III
Room 149, Damen Hall

7:00 a.m.
Informal Discisussion

7:30 a.m.
PG(2,4) and connected 2regular graphs on six vertices.
Chester J. Salwach*, Lafayette College
(84905173)

8:00 a.m.
Support sizes of triple systems.
Charles J. Colbourn*, University of Waterloo
(8490515)

8:30 a.m.
Large sets of designs.
Yeow Meng Chee*, University of Waterloo
Charles J. Colbourn, University of Waterloo
Donald L. Kreher, Rochester Institute of Technology
(8490517)

9:00 a.m.
Halving Steiner triple systems.
Alexander Rosa*, McMaster University
(84905134)

9:30 a.m.
Some structures related to tdesigns.
Luc Teirlinck*, Auburn University
(84905191)

Saturday May 20, 1989, 7:00 a.m.9:50 a.m.
Special Session on Quadratic Forms and Real Algebraic Geometry, III
Room 342, Damen Hall

7:00 a.m.
The real spectrum of higher level of a commutative ring.
Susan Barton*, Pennsylvania State University, Delaware County Campus
(84913140)

7:30 a.m.
Nonarchimedean real analysis.
Robby Robson*, Oregon State University
(8491424)

8:00 a.m.
Nash groups.
J. Madden*, Indiana University, South Bend
C. Stanton, Indiana University, South Bend
(84922143)

8:30 a.m.
Some new VapnikChervonenkis classes.
Gilbert Stengle*, Lehigh University
Joseph Yukich, Lehigh University
(8491427)

9:00 a.m.
Spinor norms of similarities.
D. B. Shapiro*, Ohio State University, Columbus
I. Alarcon, Ohio State University, Columbus
(8491578)

9:30 a.m.
Round quadratic forms under algebraic extensions.
Burkhard Alpers*, University of Saskatchewan
(8491144)

Saturday May 20, 1989, 7:00 a.m.9:50 a.m.
Special Session on Nonlinear Analysis and its Applications, II
Room 340, Damen Hall

7:00 a.m.
On Mosco convergence of convex functions.
Gerald Beer*, California State University, Los Angeles
(84946135)

7:30 a.m.
Relative index theories, linking and the minmax method.
Edward Fadell*, University of Wisconsin, Madison
(84958217)

8:00 a.m.
The relative category and its applications to differential equations.
Gilles Fournier*, Universit\'e de Sherbrooke
Michel Willem, Universit\'e Catholique Louvain, Belgium
(84958256)

8:30 a.m.
Positive fixed points and bifurcation for quasibounded maps.
E. De Pascale, University of Calabria, Italy
R. Guzzardi*, University of Calabria, Italy
(84947244)

9:00 a.m.
Nonlinear analysis in hyperbolic spaces.
Simeon Reich*, University of Southern California and The Technion, Haifa, Israel
(84947216)

9:30 a.m.
Sharp properties of a regularization method for inversion of Fourier series.
Leonede De Michele, University of Milan, Italy
Marina Di Natale, University of Milan, Italy
Delfina Roux*, University of Milan, Italy
(84942273)

Saturday May 20, 1989, 7:00 a.m.9:10 a.m.
Session on General Session
Room 148, Damen Hall

7:00 a.m.
L superior infintybounds for a quasilinear reactiondiffusion system arising from climate modeling.
Georg Hetzer, Auburn University, Auburn
Paul Guenter Schmidt*, Auburn University, Auburn
(84935188)

7:15 a.m.
Strictly equicontinuous subsets of the space of Bochner integrable functions.
Mark Gruenwald*, Northern Illinois University
(84946189)

7:30 a.m.
The topological degree for locally strongly phiaccretors operators.
YiChun Zhao*, Appalachian State University and Northeast Normal University, People's Republic of China
Tao Sun, Northeast Normal University, People's Republic of China
(8494777)

7:45 a.m.
The group and some finite surgery manifold groups of the Whitehead link.
F. D. Lonergan*, Webster, Massachusetts
J. Hosack, University of the South Pacific, Fiji Islands
(8495529)

8:00 a.m.
Moments of quadratic mappings.
Joann S. Turisco*, United States Naval Academy
(84955268)

8:15 a.m.
Elliptic integral inequalities.
Mostafa Ghandehari*, Naval Postgraduate School
David Logothetti, Santa Clara University
(8495203)

8:30 a.m.
Fixed point minimization.
Michael R. Kelly*, Tulane University
(84957115)

8:45 a.m.
On a constrained variational problem and the space of horizontal path.
Zhong Ge*, Mathematical Sciences Research Institute, Berkeley
(84958170)

9:00 a.m.
Degenerate and Poisson convergence criteria for success runs.
Anant Godbole*, Michigan Technological University
(84960228)

Saturday May 20, 1989, 7:30 a.m.9:50 a.m.
Special Session on Algebraic groups and related topics, III
Room 440, Damen Hall

7:30 a.m.
The research of the modular representations of algebraic groups in China.
XiHua Cao, East China Normal University, People's Republic of China
Jian Pan Wang*, East China Normal University, People's Republic of China and University of Virginia
(84920198)

8:00 a.m.
Nonstandard vanishing of sheaf cohomology for reductive groups.
J. E. Humphreys*, University of Massachusetts, Amherst
(8492090)

8:30 a.m.
On decomposition of modular homology representations for group geometries.
Stephen D. Smith*, University of Illinois, Chicago
(8492034)

9:00 a.m.
Induction, deformation, and specialization of Lie algebra representations.
Eric M. Friedlander*, Northwestern University
Brian J. Parshall, University of Virginia
(84917213)

9:30 a.m.
Informal Discussion

Saturday May 20, 1989, 8:00 a.m.9:50 a.m.
Special Session on Numerical Methods in Harmonic Analysis, III
Room 238, Damen Hall

8:00 a.m.
Layer potentials for elastostatics in curvilinear polygonal domains.
Jeff E. Lewis*, University of Illinois, Chicago
(84935194)

8:30 a.m.
The optimal number of terms of Fourier and Walsh series for applications in population biology, image processing, and data presentation.
James E. Daly*, University of Colorado, Colorado Springs
(84942172)

9:00 a.m.
Potential flow in channels.
Leslie Greengard*, Yale University
(84931159)

9:30 a.m.
Pattern recognition by Fourier series.
Keith Phillips*, New Mexico State University, Las Cruces
(84942199)

Saturday May 20, 1989, 8:00 a.m.9:50 a.m.
Special Session on KazhdanLusztig Theory and Related Topics, III
Room 441, Damen Hall

8:00 a.m.
A decomposition theorem for selfdual modules in the category 0.
David Collingwood, University of Washington
Ronald Irving*, University of Washington
(84922151)

8:30 a.m.
On the image of the Jacquet functor.
David H. Collingwood*, University of Washington
(84922204)

9:00 a.m.
Almost rigid nilpotent orbits.
David Vogan*, Massachusetts Institute of Technology
(8492208)

9:30 a.m.
Bruhat cells in the nilcone and the intersection rings of Schubert varieties.
James B. Carrell*, University of British Columbia
(84920145)

Saturday May 20, 1989, 8:00 a.m.9:50 a.m.
Special Session on Arithmetic Geometry and Intersection Theory, III
Room 530, Damen Hall

8:00 a.m.
RiemannRoch formulas and capacity theory.
Ted Chinburg*, Columbia University
(84914174)

8:30 a.m.
Discussion

9:00 a.m.
Capacity theory and intersection theory.
Robert Rumely*, University of Georgia
(84911214)

9:30 a.m.
Discussion

Saturday May 20, 1989, 8:00 a.m.9:50 a.m.
Special Session on Recursion Theory, III
Room 529, Damen Hall

8:00 a.m.
Diagonally nonrecursive functions and their generalizations.
Antonin Kucera*, Cornell University and Charles University, Prague, Czechoslovakia
(8490371)

8:30 a.m.
ngeneric degrees in nquantifier arithmetic.
Masahiro Kumabe*, University of Chicago
(84903116)

9:00 a.m.
Array nonrecursive sets. I.
Rod Downey, Victoria University of Wellington, New Zealand
Carl Jockusch, University of Illinois, UrbanaChampaign
Michael Stob*, Massachusetts Institute of Technology
(84903167)

9:30 a.m.
Array nonrecursive sets. II.
Rod Downey, Victoria University of Wellington, New Zealand
Carl Jockusch*, University of Illinois, UrbanaChampaign
Michael Stob, Massachusetts Institute of Technology
(84903169)

Saturday May 20, 1989, 8:00 a.m.9:50 a.m.
Special Session on Algebraic Topology of Varieties, II
Room 531, Damen Hall

8:00 a.m.
A generalization of the braid group.
Igor Dolgachev*, University of Michigan, Ann Arbor
(84955128)

8:30 a.m.
Mapping class groups, function spaces and their cohomology.
F. R. Cohen*, University of Kentucky
(8495586)

9:00 a.m.
Homotopy invariants of nonorientable 4manifolds.
Myung Ho Kim*, University of Wisconsin, Parkside
Sadayoshi Kojima, Tokyo Institute of Technology, Japan
Frank Raymond, University of Michigan, Ann Arbor
(84957163)

9:30 a.m.
Informal Discussion

Saturday May 20, 1989, 8:00 a.m.9:00 a.m.
Special Session on Partial Differential Equations, III
Room 239, Damen Hall

8:00 a.m.
Remarks on the Szeg\"o kernel.
Nicholas Hanges*, Herbert H. Lehman College, City University of New York
(84932112)

8:40 a.m.
Long range scattering and the Stark effect.
Denis A. W. White*, University of Toledo
(8493579)

Saturday May 20, 1989, 10:00 a.m.10:50 a.m.
Invited Address
Estimates for singular numbers of integral operators.
Auditorium, Flanner Hall
Richard H. Rochberg*, Washington University
(84946225)

Saturday May 20, 1989, 12:30 p.m.1:20 p.m.
Invited Address
Microlocal analysis and applications to tomographic problems.
Auditorium, Flanner Hall
Nicholas Lerner*, Purdue University, West Lafayette
(84935130)

Saturday May 20, 1989, 2:00 p.m.5:20 p.m.
Special Session on Noncommutative Ring Theory, IV
Room 730, Damen Hall

2:00 p.m.
Computational techniques in enveloping algebras and fields.
Peter Malcolmson*, Wayne State University
(84916207)

2:30 p.m.
The symmetric ring of quotients of the coproduct of rings.
Wallace S. Martindale, 3rd*, University of Massachusetts, Amherst
(84916117)

3:00 p.m.
Primitive factor rings of enveloping algebras of nilpotent Lie superalgebras.
Allen D. Bell, University of Wisconsin, Milwaukee
Ian M. Musson*, University of Wisconsin, Milwaukee
(84916126)

3:30 p.m.
An unusual free module.
John D. O'Neill*, University of Detroit
(8491641)

4:00 p.m.
XInner automorphisms of enveloping rings.
James Osterburg*, University of Cincinnati
D. S. Passman, University of Wisconsin, Madison
(8491606)

4:30 p.m.
A quantum deformation of the shapealgebra for $GL(n)$.
Earl J. Taft*, Rutgers University, New Brunswick
Jacob Towber, Yale University
(8491636)

5:00 p.m.
Uniform modules over serial rings with Krull dimension.
Mary H. Wright*, Southern Illinois University, Carbondale
(8491631)

Saturday May 20, 1989, 2:00 p.m.5:20 p.m.
Special Session on Sequence Spaces and Summability, IV
Room 339, Damen Hall

2:00 p.m.
Hardy's inequality for the discrete Hausdorff transformation.
Constantine Georgakis*, DePaul University
(84940176)

2:30 p.m.
Hardy's inequality for higher order derivatives.
Hans P. Heinig*, McMaster University
Alois Kufner, Mathematical Institute, Prague, Czechoslovakia
(8494474)

3:00 p.m.
Summability methods associated with Carleman classes and the representation of quasianalytic functions.
Jamil A. Siddiqi*, Universit\'e Laval
(84940264)

3:30 p.m.
Banach algebra of sequences and orthogonal polynomials.
William C. Connett, University of Missouri, St.\ Louis
Alan L. Schwartz*, University of Missouri, St.\ Louis
(84940238)

4:00 p.m.
Hilb type estimates for homomorphisms of l superior 1 algebras.
William C. Connett*, University of Missouri, St.\ Louis
Alan L. Schwartz, University of Missouri, St.\ Louis
(84940239)

4:30 p.m.
``Nice'' restriction of functions between certain sequence spaces.
Jong P. Lee*, State University of New York, College at Old Westbury
(84940241)

5:00 p.m.
On an analogue of Hardy's inequality.
P. D. Johnson, Jr., Auburn University
R. N. Mohapatra*, University of Central Florida
(84940250)

Saturday May 20, 1989, 2:00 p.m.5:50 p.m.
Special Session on Geometric Topology, IV
Room 641, Damen Hall

2:00 p.m.
Some homeomorphic, but not diffeomorphic homogeneous 7manifolds with strictly positive sectional curvature.
Matthias Kreck, Universit\"at Mainz, Federal Republic of Germany
Stephan Stolz*, University of Notre Dame
(84957201)

2:30 p.m.
Volumes of hyperbolic 3manifolds.
Peter B. Shalen*, University of Illinois, Chicago
Marc Culler, University of Illinois, Chicago
(84957232)

3:00 p.m.
Alexander polynomials of periodic knots.
James F. Davis*, Indiana University, Bloomington
Charles Livingston, Indiana University, Bloomington
(84957101)

3:30 p.m.
Knots and links in 3manifolds.
Richard K. Skora*, State University of New York, Stony Brook
(84957139)

4:00 p.m.
Skein modules of 3manifolds.
Jim Hoste*, Pomona College
J\'ozef Przytycki, University of British Columbia and Warsaw University, Poland
(84957218)

4:30 p.m.
Algebraic geometry and knot polynomials.
D. Cooper, University of California, Santa Barbara
D. D. Long*, University of California, Santa Barbara
(8495748)

5:00 p.m.
Dehn surgery on knots.
Cameron Gordon*, University of Texas, Austin
John Luecke, University of Texas, Austin
(84957200)

5:30 p.m.
On the reflexivity of CappellShaneson 2knots.
Jonathan A. Hillman*, Macquarie University, Australia
(84957233)

Saturday May 20, 1989, 2:00 p.m.4:30 p.m.
Special Session on KazhdanLusztig Theory and Related Topics, IV
Room 441, Damen Hall

2:00 p.m.
Hecke algebras and shellings of Bruhat intervals.
Matthew J. Dyer*, Massachusetts Institute of Technology
(84920149)

2:30 p.m.
Cells in the affine Weyl group of type tilda D sub4.
Jie Du*, University of Virginia and East China Normal University, Shanghai, People's Republic of China
(84920148)

3:00 p.m.
A combinatorial setup for questions in KazhdanLusztig theory.
Vinay V. Deodhar*, Indiana University, Bloomington
(84917147)

3:30 p.m.
Informal Discussion

Saturday May 20, 1989, 2:00 p.m.3:50 p.m.
Special Session on Algebraic groups and related topics, IV
Room 440, Damen Hall

2:00 p.m.
Extending morphisms from finite to algebraic groups.
Gary M. Seitz*, University of Oregon
Donna Testerman, Institute for Advanced Study
(8492054)

2:30 p.m.
Some remarks on Green functions of classical groups.
Bhama Srinivasan*, University of Illinois, Chicago
(84920222)

3:00 p.m.
Quantum GL sub n.
Richard Dipper*, University of Oklahoma
(84920179)

3:30 p.m.
Structure of cohomology of line bundles on G/B for semisimple groups.
Zongzhu Lin*, University of Massachusetts, Amherst
(8492051)

Saturday May 20, 1989, 2:00 p.m.3:50 p.m.
Special Session on Recursion Theory, IV
Room 529, Damen Hall

2:00 p.m.
Constructions by transfinitely many workers.
Julia F. Knight*, University of Notre Dame
(84903166)

2:30 p.m.
The lattice of ideals of R.E. degrees.
William C. Calhoun*, University of California, Berkeley
(84903131)

3:00 p.m.
Minimal degrees and recursively inseparable sets.
Manuel Lerman*, University of Connecticut, Storrs
(8490359)

3:30 p.m.
Amenable equivalence relations and Turing degrees.
Alexander S. Kechris*, California Institute of Technology
(8490376)

Saturday May 20, 1989, 2:00 p.m.4:50 p.m.
Special Session on Codes and Designs, IV
Room 149, Damen Hall

2:00 p.m.
Redundancy of Goppa codes.
Jonathan I. Hall*, Michigan State University
Albert M. Roseiro, Michigan State University
(84994260)

2:30 p.m.
On minimum weight codewords in QR codes.
Donald W. Newhart*, Department of Defense, Ft. Meade, Maryland
(84994133)

3:00 p.m.
Quadratic residue codes in their prime.
Harold Ward*, University of Virginia
(84994192)

3:30 p.m.
Simplifications to ``A new approach to the covering radius$\ldots$''
H. F. Mattson, Jr.*, Syracuse University
(84994251)

4:00 p.m.
On extremal selfdual quaternary codes of lengths 18 to 28.
W. Cary Huffman*, Loyola University of Chicago
(84994223)

4:30 p.m.
The interplay of coding theory and algebraic topology.
Jay A. Wood*, Bowdoin College
(84994249)

Saturday May 20, 1989, 2:00 p.m.3:20 p.m.
Special Session on Algebraic Topology of Varieties, III
Room 531, Damen Hall

2:00 p.m.
Equivariant rational homotopy of G Kahler manifolds.
Melvin G. Rothenberg*, University of Chicago
(84957267)

2:30 p.m.
Pseudofree group actions on fourmanifolds.
Slawomir Kwasik, Tulane University
Reinhard Schultz*, Purdue University, West Lafayette
(8495761)

3:00 p.m.
Homotopy K3 surfaces containing Sigma(2,3,7).
Ronald Fintushel*, Michigan State University
Ronald J. Stern, University of Utah
(84957186)

Saturday May 20, 1989, 2:00 p.m.4:20 p.m.
Special Session on Partial Differential Equations, IV
Room 239, Damen Hall

2:00 p.m.
A limiting viscosity approach for the Riemann problem in Eulerian gas dynamics.
Athanassios Tzavaras*, University of Wisconsin, Madison
Marshall Slemrod, University of Wisconsin, Madison
(8493546)

2:40 p.m.
Microlocal Holmgren's Theorem for a class of hypoanalytic structures.
Shiferaw Berhanu*, Temple University
(84935245)

3:20 p.m.
A necessary condition for the solvability of certain operators with multiple characteristics.
Gary B. Roberts*, University of Notre Dame
(8493539)

4:00 p.m.
Inverse boundary value problems.
Sagun Chanillo*, Rutgers University, New Brunswick
(8493540)

Saturday May 20, 1989, 2:00 p.m.4:50 p.m.
Special Session on Quadratic Forms and Real Algebraic Geometry, IV
Room 342, Damen Hall

2:00 p.m.
An introduction to blenders.
Bruce Reznick*, University of Illinois, UrbanaChampaign
(84915114)

2:30 p.m.
Quadratic forms over functionfields of elliptic and hyperelliptic curves.
Jonathan E. Shick*, University of California at San Diego, La Jolla
(8491264)

3:00 p.m.
Automorphism groups of positive definite integral quadratic forms.
John S. Hsia*, Ohio State University, Columbus
(8491162)

3:30 p.m.
Integral quadratic forms whose class and spinor genus coincide.
Andrew G. Earnest*, Southern Illinois University, Carbondale
(8491173)

4:00 p.m.
Even unimodular positive definite quadratic forms over real quadratic fields.
David C. Hung*, State University of New York, Binghamton
(8491163)

4:30 p.m.
Trace forms over Hilbertian and Henselian fields.
Martin Kruskemper*, University of Saskatchewan
(8491228)

Saturday May 20, 1989, 2:00 p.m.5:20 p.m.
Special Session on Nonlinear Analysis and its Applications, III
Room 340, Damen Hall

2:00 p.m.
Fixed point theorems for set valued mappings.
V. M. Sehgal*, University of Wyoming
S. P. Singh, Memorial University of Newfoundland
B. Watson, Memorial University of Newfoundland
(84954164)

2:30 p.m.
Fixed points for nonexpansive type multivalued mappings.
Duane E. Anderson, University of Minnesota, Duluth
K. L. Singh*, Fayetteville State University
(8494783)

3:00 p.m.
Fixed point theorems and nonlinear ergodic theorems for nonlinear semigroups.
Wataru Takahashi*, Tokyo Institute of Technology, Japan
(84947224)

3:30 p.m.
Polynomials and analytic functions on Banach spaces.
J. H. M. Whitfield*, Lakehead University
(84946261)

4:00 p.m.
An alternative principle and some of its applications.
Biagio Ricceri*, University of Messina, Saint'AgataMessina, Italy
(84947271)

4:30 p.m.
Non monotonicity of Fejer means in L superior p spaces.
Leonede De Michele*, University of Milan, Italy
Delfina Roux, University of Milan, Italy
(84942274)

5:00 p.m.
Informal Discussion

Saturday May 20, 1989, 2:00 p.m.3:10 p.m.
Session on General Session
Room 148, Damen Hall

2:00 p.m.
Regularities in the computer orbits of \v Cebysev pseudorandom number generators.
T. Erber*, Illinois Institute of Technology
D. Gavelek, Illinois Institute of Technology
(8496814)

2:15 p.m.
Computer precision and algorithmic complexity of pseudorandom number generators.
D. Gavelek*, Illinois Institute of Technology
T. Erber, Illinois Institute of Technology
(8496811)

2:30 p.m.
Generalized KustaanheimoStiefel transformation.
J. S. Rno*, University of Cincinnati
(84981246)

2:45 p.m.
Central place fractals: Theoretical geography in an urban setting.
Sandra Lach Arlinghaus*, Institute of Mathematical Geography, 2790 Briarcliff, Ann Arbor, Michigan
(84992265)

3:00 p.m.
Riemannian superlogic.
Stephen L. Weinberg*, Berkeley Academy of Artscience, Berkeley, California
(8498309)
Inquiries: meet@ams.org