AMS Sectional Meeting Full Program
Current as of Tuesday, April 12, 2005 15:09:04
Central 1993 Spring Sectional Meeting
DeKalb, IL, May 2023, 1993
Meeting #882
Associate secretaries: Andy R Magid, AMS amagid@ou.edu
Thursday May 20, 1993

Thursday May 20, 1993, 10:00 a.m.11:00 a.m.
MAA Session on test
Room 100, Cole Hall

Thursday May 20, 1993, 1:00 p.m.3:50 p.m.
Special Session on Combinatorics, I
Room 204A, DuSable Hall

1:00 p.m.
On jumping constant conjecture for multigraphs.
Vojtech R\"odl, Emory University
Alexander Sidorenko*, Courant Institute of Mathematical Sciences, New York University
(88205174) 
1:30 p.m.
Incidence posets of trees in posets of large dimension.
Graham R. Brightwell, London School of Economics, England
William T. Trotter*, Bellcore, Morristown, New Jersey
(88206162) 
2:00 p.m.
Negative density results in Euclidean Ramsey Theory.
R. L. Graham*, AT&T Bell Laboratories, Murray Hill, New Jersey
(88205140) 
2:30 p.m.
On a problem of embedding graphs into the plain.
Mario Szegedy*, AT&T Bell Laboratories, Murray Hill, New Jersey
(88205160) 
3:00 p.m.
Some geometric applications of extremal graph theory.
J\'anos Pach*, Courant Institute of Mathematical Sciences, New York University
(88205154) 
3:30 p.m.
Inequalities on codes with restricted distances.
Richard M. Wilson*, California Institute of Technology
(88205157)

1:00 p.m.

Thursday May 20, 1993, 1:00 p.m.3:50 p.m.
Special Session on Analytic Number Theory, I
Room 204, DuSable Hall

1:00 p.m.
Schur's partition theorem, companions, refinements and generalizations.
Krishnaswami Alladi*, University of Florida, Gainesville
Basil Gordon, University of California, Los Angeles
(8821106) 
1:30 p.m.
Normality to noninteger bases.
Andrew D. Pollington*, Brigham Young University
(88211122) 
2:00 p.m.
On divisors of sums of integers.
A. S\'ark\"ozy, Mathematical Institute of the Hungarian Academy of Sciences, Hungary
C. L. Stewart*, University of Waterloo
(8821115) 
2:30 p.m.
On an additive question related to one of Erdos.
Andrew D. Pollington, Brigham Young University
R. C. Vaughan*, Imperial College of Science & Technology, England
(88211151) 
3:00 p.m.
Binary additive problems concerning primes and the circle method.
Daniel A. Goldston*, San Jose State University
(88211172) 
3:30 p.m.
An additive problem of Erdos with highly composite summands.
Hugh L. Montgomery*, University of Michigan, Ann Arbor
(8821135)

1:00 p.m.
Friday May 21, 1993

Friday May 21, 1993, 8:00 a.m.10:50 a.m.
Special Session on Combinatorics, II
Room 204A, DuSable Hall

8:00 a.m.
On generalizations of the deBruijnErdos Theorem.
Hunter S. Snevily*, California Institute of Technology
(88205175) 
8:30 a.m.
New constructions of bipartite graphs on m,n vertices, with many edges, and without small cycles.
Felix Lazebnik*, University of Delaware
V. A. Ustimenko, Kiev State University, Ukraine
A. J. Woldar, Villanova University
(8820594) 
9:00 a.m.
Turan type results for graphs with many triangles.
P. Erd\"os, Hungarian Academy of Science, Hungary
Z. F\"uredi, University of Illinois, UrbanaChampaign
R. Gould, Emory University
D. S. Gunderson*, Emory University
(88205187) 
9:30 a.m.
On Erdos problem about bandwidth of graphs.
Jianfang Wang, Academia Sinica, People's Republic of China
Douglas B. West*, University of Illinois, UrbanaChampaign
Bing Yang, Northwest Normal University, China
(88205163) 
10:00 a.m.
Hadwiger's conjecture for K_6free graphs.
Robin Thomas*, Georgia Institute of Technology
(88205161) 
10:30 a.m.
Eigenvalues and separators of graphs.
Fan R.K Chung*, Bellcore, Morristown, New Jersey
(88205176)

8:00 a.m.

Friday May 21, 1993, 8:30 a.m.10:50 a.m.
Special Session on Number Theory, I
Room 204, DuSable Hall

8:30 a.m.
Transcendence and dependence via continued fractions.
Edward B. Burger*, Williams College
(88211125) 
9:00 a.m.
On the uniform distribution of Kronecker sequences.
Jozsef Beck*, Rutgers University, New Brunswick
(8821171) 
9:30 a.m.
When are elliptic curves almost periodic?
Richard K. Guy*, University of Calgary
(88211132) 
10:00 a.m.
The scarcity of squarefree binomial coefficients.
Andrew J. Granville*, University of Georgia
Olivier Ramar\'e, Institute for Advanced Study
(88211124) 
10:30 a.m.
Polynomial exponential equations.
Wolfgang Schmidt*, University of Colorado, Boulder
(88211131)

8:30 a.m.

Friday May 21, 1993, 8:30 a.m.10:50 a.m.
Special Session on Advances In Linear Algebra: Theory, Computation, Application, I
Room 433, DuSable Hall

8:30 a.m.
Regions in the complex plane containing the eigenvalues of a matrix.
Richard A. Brualdi*, University of Wisconsin, Madison
Stephen Mellendorf, University of Wisconsin, Madison
(88215120) 
9:00 a.m.
The periodic Schur decomposition. Algorithms and applications.
Paul VanDooren*, University of Illinois, UrbanaChampaign
(88265109) 
9:30 a.m.
A parallel divide and conquer algorithm for the generalized real symmetric definite tridiagonal eigenproblem.
Carlos F. Borges, Naval Postgraduate School
William B. Gragg*, Naval Postgraduate School
(88265118) 
10:00 a.m.
Advances in the numerical algebraic eigenproblem.
Zhonggang Zeng*, Northern Illinois University
(88265106) 
10:30 a.m.
Eigenvalue and inverse eigenvalue problems for Toeplitz matrices.
Santosh Kumar Mohanty*, Northern Illinois University
Gregory S. Ammar, Northern Illinois University
(88265110)

8:30 a.m.

Friday May 21, 1993, 8:30 a.m.10:20 a.m.
Special Session on Function Theory, I
Room 424, DuSable Hall

8:30 a.m.
Ahlfors alpharegular curves and bilipschitz homogoneity.
David A. Herron*, University of Cincinnati
Manouchehr Ghamsari, Christopher Newport University
(8823087) 
9:00 a.m.
Holder conditions on the reciprocal of the density of the hyperbolic metric.
C. David Minda*, University of Cincinnati
(8823019) 
9:30 a.m.
Chebyshev polynomials and discrete groups.
F. W. Gehring*, University of Michigan, Ann Arbor and Univesity of Texas, Austin
G. J. Martin, University of Auckland, New Zealand
(8823075) 
10:00 a.m.
Proof of an extremal property of Chebyshev polynomials conjectured by P. Erdos.
Alex Eremenko*, Purdue University, West Lafayette
(88230144)

8:30 a.m.

Friday May 21, 1993, 11:00 a.m.11:50 a.m.
Invited Address
Chaos in dynamical systems.
Room 100, Cole Hall
Clark Robinson*, Northwestern University
(88234186) 
Friday May 21, 1993, 1:30 p.m.2:20 p.m.
Invited Address
Trees, Hausdorff dimension, and probability.
Room 100, Cole Hall
Russell Lyons*, Indiana University, Bloomington
(88205130) 
Friday May 21, 1993, 3:00 p.m.4:20 p.m.
Special Session on Analytic Number Theory, II
Room 204, DuSable Hall

3:00 p.m.
How to improve a RosserIwaniec sieve estimate.
Roger Baker*, Brigham Young University
(8821136) 
3:30 p.m.
Functions associated with sieves.
H. Halberstam*, University of Illinois, UrbanaChampaign
H. Diamond, University of Illinois, UrbanaChampaign
H.E. Richert, University of Ulm, Germany
(88211150) 
4:00 p.m.
Functions associated with sieves, II.
Harold G. Diamond*, University of Illinois, UrbanaChampaign
H. Halberstam, University of Illinois, UrbanaChampaign
H.E. Richert, University of Ulm, Germany
(8821108)

3:00 p.m.

Friday May 21, 1993, 3:00 p.m.4:20 p.m.
Special Session on Beautiful Graph Theory, I
Room 320, DuSable Hall

3:00 p.m.
Digraph homomorphisms.
Pavol Hell*, Simon Fraser University
(8820590) 
3:30 p.m.
The number of edges in a maximal trianglefree graph.
Curtiss Barefoot, New Mexico Institute of Technology
Karen Casey, University of Colorado, Denver
David Fisher, University of Colorado, Denver
Kathryn Fraughnaugh*, University of Colorado, Denver
Frank Harary, New Mexico State University, Las Cruces
(88205152) 
4:00 p.m.
4cockades and inverse sign patterns.
Richard A. Brualdi*, University of Wisconsin, Madison
(88205129)

3:00 p.m.

Friday May 21, 1993, 3:00 p.m.5:20 p.m.
Special Session on Advances In Linear Algebra: Theory, Computation, Application, II
Room 433, DuSable Hall

3:00 p.m.
Numerical minimization of the LandaudeGennes free energy liquid crystals.
Chuck Gartland*, Kent State University, Kent
Tim Davis, Kent State University, Kent
Peter PalffyMuhoray, Southern Illinois University
(88265116) 
3:30 p.m.
Interiorpoint methods for matrix linear programming problems.
L. Faybusovich*, University of Notre Dame
(88258107) 
4:00 p.m.
Distances and conditioning in computational control.
Ralph Byers*, University of Kansas
(88293121) 
4:30 p.m.
Feedback stabilization of a secondorder system: A nonmodal approach.
Biswa Nath Datta*, Northern Illinois University
Fernando Rinc\'on, Northern Illinois University
(88293105) 
5:00 p.m.
A cell structure for the set of autoregressive systems.
Joachim Rosenthal*, University of Notre Dame
Xiaochang Wang, Texas Tech University
(8829388)

3:00 p.m.

Friday May 21, 1993, 3:00 p.m.6:20 p.m.
Special Session on Stochastic Processes, I
Room 202A, DuSable Hall

3:00 p.m.
Branching processes in varying environments.
Russell Lyons*, Indiana University, Bloomington
(8826076) 
3:30 p.m.
Regular conditional probabilities and a linear birthdeath predatorprey process.
John Coffey*, Purdue University, Calumet Campus
(8826009) 
4:00 p.m.
Limiting behavior of the connectivity function of oriented percolation with long range.
Bao Nguyen*, Illinois Institute of Technology
WeiShih Yang, Temple University
(8826005) 
4:30 p.m.
Operator valued weight functions on the torus: Factorization and invariant subspaces.
Ray Cheng*, University of Louisville
(8826003) 
5:00 p.m.
Stochastic modeling of seismic records based on deterministic formulations.
G. R. DargahiNoubary*, Bloomsburg University of Pennsylvania
(8826013) 
5:30 p.m.
AR cyclostationary processes and period uncertainty.
Peter J. Sherman*, Iowa State University
(88260148) 
6:00 p.m.
Stochastic analysis for measuring income inequality and poverty.
Ibrahim A. Ahmad*, Northern Illinois University
(8826092)

3:00 p.m.

Friday May 21, 1993, 3:00 p.m.4:50 p.m.
Special Session on Function Theory, II
Room 424, DuSable Hall

3:00 p.m.
A sharp norm estimate for the conjugate function.
Matts Essen, Uppsala University, Sweden
Daniel Shea*, University of Wisconsin, Madison
Charles Stanton, California State University, San Bernardino
(8824299) 
3:30 p.m.
Some local properties of the solutions of secondorder differential equations.
Jiuyi Cheng*, Virginia Polytechnic Institute and State University
John Rossi, Virginia Polytechnic Institute and State University
(8823062) 
4:00 p.m.
Computation of Nevanlinna error terms.
Peter Hall*, University of Alabama, Tuscaloosa
(8823044) 
4:30 p.m.
The best error terms of classical functions.
Linda Sons, Northern Illinois University
Zhuan Ye*, Northern Illinois University
(88230145)

3:00 p.m.

Friday May 21, 1993, 3:00 p.m.4:20 p.m.
Special Session on Probabilistic Methods, I
Room 204A, DuSable Hall

3:00 p.m.
Minimal absolute values of random trigonometric polynomials.
A. M. Odlyzko*, AT&T Bell Laboratories, Murray Hill, New Jersey
(88260103) 
3:30 p.m.
A normal law for matchings.
Jeff Kahn*, Rutgers University, New Brunswick
(88205167) 
4:00 p.m.
On random matchings in regular graphs.
Jeff Kahn, Rutgers University, New Brunswick
Jeong Han Kim*, Rutgers University, New Brunswick
(88205166)

3:00 p.m.

Friday May 21, 1993, 3:00 p.m.4:50 p.m.
Special Session on Discrete Groups, I
Room 426, DuSable Hall

3:00 p.m.
The elliptic order algorithm.
Jane Gilman*, Rutgers University, Newark
(8822074) 
3:30 p.m.
Discreteness conditions in PU(2,1), I.
Robert Miner*, University of Oklahoma
Ara Basmajian, University of Oklahoma
(88251137) 
4:00 p.m.
Discreteness conditions in PU(2,1), II.
Ara Basmajian*, University of Oklahoma
Robert Miner, University of Oklahoma
(88251138) 
4:30 p.m.
Strange action of cocompact 3hyperbolic groups on H^5 and spaces fibering over closed hyperbolic 3manifolds.
Boris Apanasov*, University of Oklahoma
(8825737)

3:00 p.m.

Friday May 21, 1993, 3:00 p.m.5:50 p.m.
Special Session on Mathematical Topics in Fluid Dynamics, I
Room 432, DuSable Hall

3:00 p.m.
Fractal dimension of short trajectories from the nonNewtonian attractor.
J. Necas*, Northern Illinois University
J. Malek, Charles University, Czechoslovakia
(8823531) 
3:30 p.m.
Singular nonlinear Schrodinger limits.
Paul K. Newton*, University of Illinois, UrbanaChampaign
(8827617) 
4:00 p.m.
Young measurevalued solutions for nonNewtonian incompressible fluids.
H. Bellout*, Northern Illinois University
F. Bloom, Northern Illinois University
J. Necas, Northern Illinois University
(8823530) 
4:30 p.m.
Advection of a passive scalar by dipolar vortex couple.
Andrew J. Bernoff*, Northwestern University
Joseph F. Lingevitch, Northwestern University
(8827633) 
5:00 p.m.
Attractors of nonNewtonian and bipolar viscous fluids.
Frederick Bloom*, Northern Illinois University
(8827666) 
5:30 p.m.
Renormalisation group theory for similarity solutions of the second kind in porous medium flow and the propagation of turbulence.
Nigel Goldenfeld*, University of Illinois, UrbanaChampaign
(8827668)

3:00 p.m.

Friday May 21, 1993, 4:30 p.m.5:50 p.m.
Special Session on Combinatorics, III
Room 204A, DuSable Hall

4:30 p.m.
Asymptotic enumeration of full graphs.
D. J. Kleitman*, Massachusetts Institute of Technology
F. Lasaga, Massachusetts Institute of Technology
L. J. Cowen, Massachusetts Institute of Technology
(88205153) 
5:00 p.m.
Graph generated unionclosed families and the unionclosed sets conjecture.
Emanuel Knill*, Los Alamos National Laboratory
(88205155) 
5:30 p.m.
Twopart shadows.
G. O. H. Katona*, University of Illinois, UrbanaChampaign and Mathematical Institute of Hungarian Academy of Sciences, Hungary
(88205173)

4:30 p.m.

Friday May 21, 1993, 4:30 p.m.5:55 p.m.
Session on Theory of Numbers
Room 202C, DuSable Hall

4:30 p.m.
Power reciprocity of Jacobi sums.
Charles Helou*, Pennsylvania State University, Delaware County Campus
(8821134) 
4:45 p.m.
On Sidon sequences of even orders.
Sheng Chen*, Southwest Texas State University
(8821138) 
5:00 p.m.
Primes of the fifth cyclomatic field.
Andrew J. Lazarus*, Berkeley, California
(8821186) 
5:15 p.m.
Ramanujan's formulas for the coefficients in the expansions of certain modular forms.
Paul Bialek*, University of Illinois, UrbanaChampaign
(88211168) 
5:30 p.m.
A generalzied approach to the 3x+1 problem.
Stephen M. Zemyan*, Pennsylvania State University, University Park
(88211170) 
5:45 p.m.
Unified algorithm to find existent units in algebraic number fields of the form Q(w).
Malvina Baica*, University of Wisconsin, Whitewater
(88212139)

4:30 p.m.
Saturday May 22, 1993

Saturday May 22, 1993, 8:00 a.m.9:20 a.m.
Special Session on Beautiful Graph Theory, II
Room 320, DuSable Hall

8:00 a.m.
Groupies in graphs.
John Mackey*, University of Hawaii, Honolulu
(8820504) 
8:30 a.m.
A family of sparse graphs of large sum number.
Nora Hartsfield*, Western Washington University
W. F. Smyth, McMaster University
(88205189) 
9:00 a.m.
How chordal graphs work.
Terry McKee*, Wright State University, Dayton
(8820551)

8:00 a.m.

Saturday May 22, 1993, 8:00 a.m.10:50 a.m.
Special Session on Stochastic Processes, II
Room 202A, DuSable Hall

8:00 a.m.
Poisson and Poisson process approximations for random tournaments.
Anant P. Godbole*, Michigan Technological University
Jinghua Qian, Michigan Technological University
(8826032) 
8:30 a.m.
Necessary and sufficient conditions for L^p convergence of sums of independent random variables.
Nasrollah Etemadi*, University of Illinois, Chicago
(8826070) 
9:00 a.m.
Empirical distribution functions and strong approximation theorems for dependent random variables.
Walter Philipp*, University of Illinois, UrbanaChampaign
(8826026) 
9:30 a.m.
Differential geometrical structures related to forecasting error variance ratios.
Daming Xu*, University of Oregon
(88260133) 
10:00 a.m.
Lyanpunov exponent of the stochastic harmonic oscillator.
Mark Pinsky*, Northwestern University
(8826014) 
10:30 a.m.
Random walks on the free groups and homogeneous trees.
Steven P. Lalley*, Purdue University, West Lafayette
(8826097)

8:00 a.m.

Saturday May 22, 1993, 8:00 a.m.9:20 a.m.
Special Session on Probabilistic Methods, II
Room 204A, DuSable Hall

8:00 a.m.
On the distribution of sums of residues.
Jerrold R. Griggs*, University of South Carolina, Columbia
(88211190) 
8:30 a.m.
An upper bound for the solvability probability of a random stable roommates instance.
Robert W. Irving, University of Glasgow, Scotland
Boris Pittel*, Ohio State University, Columbus
(8820555) 
9:00 a.m.
Connectedness and isolated points.
Rod Canfield*, University of Georgia
(88205180)

8:00 a.m.

Saturday May 22, 1993, 8:30 a.m.10:50 a.m.
Special Session on Analytic Number Theory, III
Room 204, DuSable Hall

8:30 a.m.
Application of the BombieriSperber construction to estimating hybrid exponential sums on quasiprotective varieties over finite fields.
C. J. Mozzochi*, Princeton University
(8821148) 
9:00 a.m.
New estimates for smooth Weyl sums.
Trevor D. Wooley*, University of Michigan, Ann Arbor
(8821112) 
9:30 a.m.
A conjecture for the sixth moment of the zeta function.
Brian Conrey*, Oklahoma State University, Stillwater
(88211123) 
10:00 a.m.
Estimates for Lfunctions.
John B. Friedlander*, University of Toronto
Bill Duke, Rutgers University, New Brunswick
Henryk Iwaniec, Rutgers University, New Brunswick
(88211149) 
10:30 a.m.
Practical numbers.
Adolf Hildebrand*, University of Illinois, UrbanaChampaign
(8821122)

8:30 a.m.

Saturday May 22, 1993, 8:30 a.m.10:50 a.m.
Special Session on Advances In Linear Algebra: Theory, Computation, Application, III
Room 433, DuSable Hall

8:30 a.m.
A new method for wavepacket propogation.
Mark Arnold*, Iowa State University
(88265119) 
9:00 a.m.
Recursive total least squares.
Daniel L. Boley*, University of Minnesota, Minneapolis
(88265111) 
9:30 a.m.
Fast solutions to illconditioned, banded toeplitz least squares problems.
James G. Nagy*, Southern Methodist University
(88265115) 
10:00 a.m.
Schurlike algorithms for the fast triangular factorization of general Hankel and Toeplitz matrices.
Roland W. Freund*, AT&T Bell Laboratories, Murray Hill, New Jersey
(88265112) 
10:30 a.m.
Iterative refinement with parallel algorithms for Toeplitz matrices.
I. Koltracht, University of Connecticut, Storrs
D. Xiao*, University of Connecticut, Storrs
(88265117)

8:30 a.m.

Saturday May 22, 1993, 8:30 a.m.10:50 a.m.
Special Session on Function Theory, III
Room 424, DuSable Hall

8:30 a.m.
A quadratic extremal problem on the Dirichlet space.
Stephen D. Fisher*, Northwestern University
(8823028) 
9:00 a.m.
On very weak solutions of certain elliptic systems.
John Lewis*, University of Kentucky
(8823027) 
9:30 a.m.
Normal families, derivatives, and uniformity.
Peter Lappan*, Michigan State University
(88230141) 
10:00 a.m.
An inequality on the logarithmic derivative.
Joseph Miles*, University of Illinois, UrbanaChampaign
John Rossi, Virginia Polytechnic Institute and State University
(88230142) 
10:30 a.m.
Extremal functions in invariant subspaces of Bergman spaces.
Peter Duren*, University of Michigan, Ann Arbor
Dmitry Khavinson, University of Arkansas, Fayetteville
Harold S. Shapiro, Royal Institute of Technology, Sweden
(8823063)

8:30 a.m.

Saturday May 22, 1993, 9:00 a.m.10:20 a.m.
Special Session on Discrete Groups, II
Room 426, DuSable Hall

9:00 a.m.
The numerical computation of the DouadyEarle extension and Teichmuller mappings.
Taiping Ye*, University of Connecticut, Storrs
(8823050) 
9:30 a.m.
Cohomology of mapping class groups.
Henry H. Glover, Ohio State University, Columbus
Guido Mislin, Ohio State University, Columbus
Yining Xia*, Northwestern University
(8825549) 
10:00 a.m.
Random walk on Teichmuller space.
Howard Masur*, University of Illinois, Chicago
(8823085)

9:00 a.m.

Saturday May 22, 1993, 9:00 a.m.10:50 a.m.
Special Session on Mathematical Topics in Fluid Dynamics, II
Room 432, DuSable Hall

9:00 a.m.
Singularities in surface tension driven flows.
Andrea Bertozzi*, University of Chicago
Michael Brenner, University of Chicago
Todd F. Dupont, University of Chicago
Leo P. Kadanoff, University of Chicago
(8827667) 
9:30 a.m.
Singular limit problems in conservation laws.
Guiqiang Chen*, University of Chicago
(8823540) 
10:00 a.m.
On the local and global behaviour of solutions to the singular parabolic equation u_t=DELTA lnu.
E. DiBenedetto*, Northwestern University
(8827696) 
10:30 a.m.
Energy dissipation without viscosity in ideal hydrodynamics.
Gregory L. Eyink*, University of Illinois, UrbanaChampaign
(8827695)

9:00 a.m.

Saturday May 22, 1993, 9:00 a.m.10:25 a.m.
Session on Analysis, Geometry, Probability
Room 202C, DuSable Hall

9:00 a.m.
Topological properties of some vector valued sequence spaces generated by infinite matrices.
Nandita Rath*, Washington State University
(88240100) 
9:15 a.m.
A characterization of the second dual of C_o(S,A).
Stephen Choy*, National University of Singapore, Singapore
James Wong, University of Calgary
(8824601) 
9:30 a.m.
The Bourgain algebra of the algebra of generalized analytic functions.
Toma V. Tonev*, University of Montana
(88246135) 
9:45 a.m.
Compact Hankel and Toeplitz operators on CxboldD.
Charles Lin, University of Illinois, Chicago
Fudong Chen*, University of Illinois, Chicago
Bin Yan, University of Illinois, Chicago
(8824782) 
10:00 a.m.
On lifts of structure satisfying F^K+1  a^2 F^K1=0.
Lovejoy Das*, Kent State University
(8825347) 
10:15 a.m.
Estimation of parameters from twotruncation parameter families.
Kandasamy Selvavel*, Claflin College
(8826291)

9:00 a.m.

Saturday May 22, 1993, 9:30 a.m.10:50 a.m.
Special Session on Combinatorics, IV
Room 204A, DuSable Hall

9:30 a.m.
Lower bounds for chromatic numbers of hypergraphs. The topological method.
Igor Kriz*, Chicago University
(88205164) 
10:00 a.m.
The crossing number of a graph on a compact 2manifold.
F. Shahrokhi, University of New Mexico
O. S\'ykora, University of New Mexico
L. A. Sz\'ekely*, University of New Mexico
I. Vr\v to, University of New Mexico
(88205159) 
10:30 a.m.
Some recent developments of the Erdos Ginzburg Ziv theorem.
A. Bialostocki*, University of Idaho
(88205169)

9:30 a.m.

Saturday May 22, 1993, 9:30 a.m.10:50 a.m.
Special Session on History of Mathematics, I
Room 202D, DuSable Hall

9:30 a.m.
The role of Catherine the Great in the development of mathematics education in Russia.
Irving H. Anellis*, Modern Logic Publishing, Iowa
(8820153) 
10:00 a.m.
Euler's early use of trigonometric series.
Ronald William Golland*, Nalco Chemical Company, Illinois
(8820184) 
10:30 a.m.
The richness of the history of geometry in the 19th century.
Louise Ahrndt Golland*, University of Chicago
(8820183)

9:30 a.m.

Saturday May 22, 1993, 11:00 a.m.11:50 a.m.
Invited Address
Instabilities in fluid motion.
Room 100, Cole Hall
Susan Friedlander*, University of Illinois, Chicago
Misha Vishik, University of Texas, Austin
(8827645) 
Saturday May 22, 1993, 1:00 p.m.2:20 p.m.
Special Session on Combinatorics, V
Room 204A, DuSable Hall

1:00 p.m.
Addition of residue classes modulo p^n.
B\'ela Bollob\'as*, University of Cambridge, England
(88211158) 
1:30 p.m.
What is the structure of A+A if A+A is large?
Vera T. S\'os*, Hungarian Academy of Science, Hungary
(88211156) 
2:00 p.m.
On a problem of Rohrbach for finite groups.
XingDe Jia*, Southwest Texas State University
(8821180)

1:00 p.m.

Saturday May 22, 1993, 1:00 p.m.2:20 p.m.
Special Session on Analytic Number Theory, IV
Room 204, DuSable Hall

1:00 p.m.
The number of steps in the Euclidean algorithm.
Doug Hensley*, Texas A\thsp\&\thsp M University, College Station
(8821111) 
1:30 p.m.
Some remarks on the prime number theorem.
P.D.T.A. Elliott*, University of Colorado, Boulder
(8821124) 
2:00 p.m.
Radial analogues of the BeurlingSelberg functions.
Jeffrey J. Holt, University of Texas, Austin
Jeffrey D. Vaaler*, University of Texas, Austin
(8821107)

1:00 p.m.

Saturday May 22, 1993, 1:00 p.m.5:50 p.m.
Special Session on Mathematical Topics in Fluid Dynamics, III
Room 432, DuSable Hall

1:00 p.m.
Anistropy in HeleShaw flow.
Robert Almgren*, University of Chicago
(8827642) 
1:30 p.m.
WKB and spectral problems, arising in hydrodynamics.
Misha M. Vishik*, University of Texas, Austin
(8827664) 
2:00 p.m.
Center manifold equations from hydrodynamics.
Robert E. Turner*, University of Wisconsin, Madison
(8827620) 
2:30 p.m.
Crystalline liquids in shear flow: A laboratory for nonequilibrium phenomena.
Paul M. Goldbart*, University of Illinois, UrbanaChampaign
Peter D. Olmsted, Exxon Research and Engineering Company, Annandale, New Jersey
(8827689) 
3:00 p.m.
Informal Discussion 
3:30 p.m.
Local hydrodynamic instabilities in rotating stars.
Norman R. Lebovitz*, University of Chicago
Alexander Lifschitz, University of Illinois, Chicago
(8827641) 
4:00 p.m.
Alfvenic perturbations in a stellar wind with a spiral magnetic field in the equatorial plane.
YuQing Lou*, University of Chicago
(8827672) 
4:30 p.m.
Wave packets, bifurcations and chaos in geophysical flows.
Huijun Yang*, University of Chicago
(8827665) 
5:00 p.m.
Nonlinear restrictions on turbulent transport and dynamo action.
Fausto Cattaneo*, University of Chicago
Louis Tao, University of Chicago
Samuel I. Vainshtein, University of Chicago
(8827639) 
5:30 p.m.
Comparative study of nonaxisymmetric instabilities of axisymmetric equilibria in fluids and plasmas.
Eliezer Hameiri, Courant Institute of Mathematical Sciences, New York University
Alexander Lifschitz*, University of Illinois, Chicago
(8827643)

1:00 p.m.

Saturday May 22, 1993, 1:00 p.m.2:25 p.m.
General Session
Room 202C, DuSable Hall

1:00 p.m.
Mathematics in the Sulbas: Geometry and geometric algebra.
R. N. Kalia*, Saint Cloud State University
(8820198) 
1:15 p.m.
Bezout and semihereditary power series rings.
Delors Herbera*, Rutgers University, New Brunswick
(88216188) 
1:30 p.m.
Further results of the channel assignment problem.
Daphne D. Liu*, California State University, Los Angeles
(88205128) 
1:45 p.m.
On diameters of the generalized prisms.
Weizhen Gu*, Southwest Texas State University
Songlin Tian, Central Missouri State University
(8820546) 
2:00 p.m.
Structure of the set of closure operators on a given set.
Marcin Schroeder*, Southern Illinois University, Carbondale
(88206184) 
2:15 p.m.
Mazes with more than one printmouse.
Ponnammal Natarajan*, Anna University, India
(8826873)

1:00 p.m.

Saturday May 22, 1993, 1:30 p.m.3:20 p.m.
Special Session on Advances In Linear Algebra: Theory, Computation, Application, IV
Room 433, DuSable Hall

1:30 p.m.
Adaptive iterative methods for linear systems of equations.
Daniela Calvetti*, Stevens Institute of Technology
(88265114) 
2:00 p.m.
Convergence results for the blocksymmetric GaussSeidel iteration for the nonsymmetric case: An application to the convectiondiffusion equation.
R. E. Bank, University of California at San Diego, La Jolla
Mohamed Benbourenane*, Northern Illinois University
(88265108) 
2:30 p.m.
Generalized ADI iteration.
Lothar Reichel*, Kent State University, Kent
(88265113) 
3:00 p.m.
On iterative convergence of matrix equations.
TeckCheong Lim*, George Mason University
(8821552)

1:30 p.m.

Saturday May 22, 1993, 1:30 p.m.4:50 p.m.
Special Session on Stochastic Processes, III
Room 202A, DuSable Hall

1:30 p.m.
On the completeness of the spectral domain for harmonizable processes.
Abol G. Miamee, Hampton University
Bernd S. W. Schr\"oder*, Hampton University
(8822869) 
2:00 p.m.
An example of a periodically correlated sequence whose spectral domain is not complete.
A. Makagon*, Michigan State University
H. Salehi, Michigan State University
(8826081) 
2:30 p.m.
Prediction and moving average representation for strongly harmonizable processes.
Marc H. Mehlman*, University of Pittsburgh, Johnstown
(88260143) 
3:00 p.m.
Informal Discussion 
3:30 p.m.
Inference for heavy tailed distributions.
K. B. Athreya, Iowa State University
S. N. Lahiri, Iowa State University
Wei Wu*, University of Illinois, UrbanaChampaign
(8826023) 
4:00 p.m.
Random polynomials.
K. Farahmand*, University of Ulster, Nothern Ireland
(8826002) 
4:30 p.m.
Alan Turing and the central limit theorem.
Sandy Zabell*, Northwestern University
(88201177)

1:30 p.m.

Saturday May 22, 1993, 1:30 p.m.2:50 p.m.
Special Session on Discrete Groups, III
Room 426, DuSable Hall

1:30 p.m.
Iterated commutator for a Fuchsian group.
F. W. Gehring*, University of Michigan, Ann Arbor and University of Texas, Austin
G. J. Martin, University of Auckland, New Zealand
(8823078) 
2:00 p.m.
Complex projective structures with given monodromy.
M. Kapovich*, University of Utah
(8823029) 
2:30 p.m.
Remarks on a remark of Jorgenson.
Bernard Maskit*, State University of New York, Stony Brook
(8823093)

1:30 p.m.

Saturday May 22, 1993, 2:00 p.m.4:45 p.m.
Special Session on History of Mathematics, II
Room 202D, DuSable Hall

2:00 p.m.
Lie's "Galois theory of differential equations" I: Historical background.
Uta C. Merzbach*, LHM Institute and Smithsonian Institution
(88201127) 
2:45 p.m.
Informal Discussion 
3:00 p.m.
Lie's "Galois theory of differential equations" II: Lie.
T. Christine Stevens*, Saint Louis University
(88201134) 
3:45 p.m.
Informal Discussion 
4:00 p.m.
Lie's Galois theory of differential equations: III The algebraic approach.
Phyllis Joan Cassidy*, Smith College
(8820121)

2:00 p.m.

Saturday May 22, 1993, 2:30 p.m.5:50 p.m.
Special Session on Number Theory, II
Room 204, DuSable Hall

2:30 p.m.
Extensions of Freiman's inverse theorem in additive number theory.
Melvyn B. Nathanson*, Herbert H. Lehman College, City University of New York
(8821158) 
3:00 p.m.
The order of a typical matrix.
Eric Schmutz*, Drexel University
(8821161) 
3:30 p.m.
On the solvabilty of the equation x+y=z^2 in the finite partition of integers.
Endre Szemer\'edi*, Rutgers University, New Brunswick
(8821118) 
4:00 p.m.
Complementing sets of integers.
R. Tijdeman*, University of Leiden, Netherlands
(8821159) 
4:30 p.m.
On the distribution of squarefull numbers in short intervals.
Michael Filaseta, University of South Carolina, Columbia
Ognian Trifonov*, University of South Carolina, Columbia
(88211171) 
5:00 p.m.
Expressing a positive integer as a sum of a given number of distinct squares of positive integers.
Paul T. Bateman*, University of Illinois, UrbanaChampaign
Adolf Hildebrand, University of Illinois, UrbanaChampaign
George B. Purdy, University of Illinois, UrbanaChampaign
(88211136) 
5:30 p.m.
Upper bounds for B_3sequences.
S. W. Graham*, Michigan Technological University
(8821125)

2:30 p.m.

Saturday May 22, 1993, 2:30 p.m.5:20 p.m.
Special Session on Beautiful Graph Theory, III
Room 320, DuSable Hall

2:30 p.m.
The color permuting group of an isomorphic factorization.
Allen J. Schwenk*, Western Michigan University
(88205185) 
3:00 p.m.
Bounds on the double domination number of a graph.
Frank Harary, New Mexico State University
Teresa Haynes*, East Tennessee State University
(88205104) 
3:30 p.m.
Some results on independent distance domination in graphs.
Lowell W. Beineke*, Indiana UniversityPurdue University, Ft.\ Wayne
Michael A. Henning, University of Natal, Republic of South Africa
(88205147) 
4:00 p.m.
If a graph appears symmetrical, must it be symmetrical?
Russell Lyons*, Indiana University, Bloomington
(8820579) 
4:30 p.m.
Graphical factorizations.
Mike Plantholt*, Illinois State University
(88205101) 
5:00 p.m.
Some methods of destroying the automorphisms of a graph.
Frank Harary*, New Mexico State University, Las Cruces
(88205102)

2:30 p.m.

Saturday May 22, 1993, 3:00 p.m.5:20 p.m.
Special Session on Probabilistic Methods, III
Room 204A, DuSable Hall

3:00 p.m.
A random representation of the complete bipartite graph.
Zolt\'an F\"uredi*, University of Illinois, UrbanaChampaign
(88205182) 
3:30 p.m.
On the Lovasz local lemma.
Jozsef Beck*, Rutgers University, New Brunswick
(8820556) 
4:00 p.m.
Embedding bounded degree trees into graphs.
Endre Szemer\'edi*, Rutgers University, New Brunswick
(88205165) 
4:30 p.m.
Firstorder properties of random substructures.
Miklos Ajtai*, IBM Almaden Research Center, San Jose, California
(88205183) 
5:00 p.m.
Threshold for collapsibility in random graphs.
E. M. Palmer, Michigan State University
Joseph J. Spencer*, Michigan State University
(8820557)

3:00 p.m.
Sunday May 23, 1993

Sunday May 23, 1993, 9:00 a.m.11:20 a.m.
Special Session on Number Theory, III
Room 204, DuSable Hall

9:00 a.m.
Equality among numbertheoretic functions.
Solomon W. Golomb*, University of Southern California
(8821116) 
9:30 a.m.
On composite n satisfying psi(n) equiv 1(mod n).
M. V. Subbarao*, University of Alberta
(8821160) 
10:00 a.m.
Some aspects of Carmichael numbers and the ErdosAGP gap.
William R. Alford*, University of Georgia
(88211178) 
10:30 a.m.
Density bounds for the 3x+1 problem.
David Applegate, AT&T Bell Laboratories, Murray Hill, New Jersey
Jeffrey C. Lagarias*, AT&T Bell Laboratories, Murray Hill, New Jersey
(8821110) 
11:00 a.m.
On some problems of Paul Erdos.
John L. Selfridge*, Northern Illinois University
(88211126)

9:00 a.m.

Sunday May 23, 1993, 9:00 a.m.10:50 a.m.
Special Session on Probabilistic Methods, IV
Room 204A, DuSable Hall

9:00 a.m.
Asymptotic bases for numbers by probability methods.
Prasad Tetali*, AT&T Bell Laboratories, Murray Hill, New Jersey
(8821154) 
9:30 a.m.
Eigenvalues and routing in graphs.
Fan R. K. Chung*, Bellcore, Morristown, New Jersey
(88205181) 
10:00 a.m.
The Janson inequalities.
Joel Spencer*, Courant Institute of Mathematical Sciences, New York University
(88205179) 
10:30 a.m.
Bounds on the expected number of ksets.
William Steiger*, Rutgers University, New Brunswick
(88252146)

9:00 a.m.