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AMS Sectional Meeting Full Program

Current as of Tuesday, April 12, 2005 15:08:42

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1990 Central Section Meeting
Manhattan, KS, March 16-17, 1990
Meeting #855

Associate secretaries:
Andy R Magid, AMS amagid@ou.edu

Friday March 16, 1990

  • Friday March 16, 1990, 7:30 a.m.-9:50 a.m.
    Special Session on Geometric Function Theory, I
    Room 144, Cardwell Hall

    • 7:30 a.m.
      The maximum modulus and characteristic.
      David Drasin*, Purdue University, West Lafayette
      (855-30-200)
    • 8:00 a.m.
      Estimates for sets where a meromorphic function is large.
      Matts Essen, Uppsala Universirt, Sweden
      John Rossi, Virginia Polytechnic Institute and State University
      Daniel Shea*, University of Wisconsin, Madison
      (855-30-193)
    • 8:30 a.m.
      An application of the spread relation to algebraic differential equations.
      Gary G. Gundersen*, University of New Orleans
      (855-34-138)
    • 9:00 a.m.
      On an L^2 inequality involving entire functions of exponential type.
      Li-Chien Shen*, University of Florida
      (855-30-137)
    • 9:30 a.m.
      Stochastic Loewner equation.
      David Rochberg, Washington University
      Richard Rochberg*, Washington University
      (855-30-139)

  • Friday March 16, 1990, 7:30 a.m.-9:50 a.m.
    Special Session on Inverse Problems and Scattering Theory, I
    Room 143, Cardwell Hall

    • 7:30 a.m.
      Efficient numerical methods for solving inverse problems of PDE.
      Y. M. Chen*, State University of New York, Stony Brook
      (855-65-02)
    • 8:20 a.m.
      Recovery of coefficients in first order hyperbolic equations.
      Michael Pilant, Texas A & M University, College Station
      William Rundell*, Texas A & M University, College Station
      (855-35-73)
    • 9:10 a.m.
      An iterative method for one-dimensional second order inverse spectral problems.
      William Rundell, Texas A & M University, College Station
      Paul E. Sacks*, Iowa State University
      (855-35-72)

  • Friday March 16, 1990, 8:00 a.m.-9:50 a.m.
    Special Session on Harmonic Analysis and Probability Theory, I
    Room 131, Cardwell Hall

    • 8:00 a.m.
      Martingale transforms and paraproducts.
      J.-A. Chao*, Cleveland State University
      R.-L. Long, Academia Sinica, People's Republic of China
      (855-60-51)
    • 8:30 a.m.
      Conformal geometry, Sobolev inequalities and symmetrization.
      William Beckner*, University of Texas, Austin
      (855-42-69)
    • 9:00 a.m.
      Fractional integration on tail sigma-fields.
      Andrew G. Bennett*, Kansas State University
      (855-60-109)
    • 9:30 a.m.
      Superadditivity of Fisher's information and logarithmic Sobolev inequalities.
      Eric A. Carlen*, Princeton University
      (855-62-170)

  • Friday March 16, 1990, 8:00 a.m.-9:50 a.m.
    Special Session on Orthostructures, I
    Room 121, Cardwell Hall

    • 8:00 a.m.
      A sheaf representation theorem for Baer and Rickart rings.
      Douglas G. Burkholder, Wichita State University
      Gary D. Crown*, Wichita State University
      (855-16-161)
    • 8:30 a.m.
      Graph theoretic properties in the context of orthomodular theory.
      Gerald Schrag*, Central Missouri State University
      Larry Cammack, Central Missouri State University
      (855-06-185)
    • 9:00 a.m.
      On states and generalized state spaces of the generalizations of the Greechie lattice.
      Larry Cammack*, Central Missouri State University
      Gerald Schrag, Central Missouri State University
      (855-06-187)
    • 9:30 a.m.
      Computational systems for research on orthostructures.
      William David Miller*, Oklahoma State University, Stillwater
      (855-68-196)

  • Friday March 16, 1990, 8:00 a.m.-9:50 a.m.
    Special Session on Partial Differential Equations, I
    Room 129, Cardwell Hall

    • 8:00 a.m.
      Least-energy solutions to a semilinear Neumann problem related to biological pattern formation.
      Izumi Takagi*, Tohoku University, Japan
      (855-35-188)
    • 8:30 a.m.
      Spatially degenerate nonlinear diffusion with drift and the Wentzel boundary condition.
      Jerome A. Goldstein*, Tulane University
      Chin-Yuan Lin, Texas A\thsp\&\thsp M University, College Station
      (855-35-118)
    • 9:00 a.m.
      Stability and Hopf bifurcation of solutions of the Dirichlet problem for diffusive predator-prey systems.
      Robert Gardner*, University of Massachusetts, Amherst
      (855-35-43)
    • 9:30 a.m.
      A quasilinear parabolic problem in one space dimension.
      J. R. Dorroh, Louisiana State University, Baton Rouge
      Gisele Ruiz Rieder*, Louisiana State University, Baton Rouge
      (855-35-191)

  • Friday March 16, 1990, 8:00 a.m.-9:50 a.m.
    Special Session on Commutative Algebra, I
    Room 102, Cardwell Hall

    • 8:00 a.m.
      Galois theory on the line.
      Shreeram S. Abhyankar*, Purdue University, West Lafayette
      (855-14-07)
    • 8:30 a.m.
      Finite generation of monoids of fractional ideals.
      D. D. Anderson*, University of Iowa
      (855-13-12)
    • 9:00 a.m.
      Intersection multiplicity of modules.
      Sankar Prasad Dutta*, University of Illinois, Urbana-Champaign
      (855-13-146)
    • 9:30 a.m.
      Finite phantom projective dimension.
      Ian M. Aberbach*, University of Michigan, Ann Arbor
      (855-13-95)

  • Friday March 16, 1990, 8:00 a.m.-9:50 a.m.
    Special Session on Ergodic Theory, I
    Room 130, Cardwell Hall

    • 8:00 a.m.
      Ergodic theorems for subsequences and moving averages.
      Roger L. Jones*, DePaul University
      (855-42-74)
    • 8:30 a.m.
      A maximal inequality and its consequences in ergodic theory.
      J. Rosenblatt, Ohio State University, Columbus
      M. Wierdl*, Ohio State University, Columbus
      (855-28-179)
    • 9:00 a.m.
      On induced operators.
      R. E. Bradley*, Northwestern University
      (855-28-37)
    • 9:30 a.m.
      Failure of the Wiener-Wintner property for the helical transform in L^1.
      Idris Assani*, University of North Carolina, Chapel Hill
      (855-28-39)

  • Friday March 16, 1990, 8:00 a.m.-9:50 a.m.
    Special Session on Graph Theory, I
    Room 146, Cardwell Hall

    • 8:00 a.m.
      Coloring tournaments.
      Kunwarjit S. Bagga, Ball State University
      Lowell W. Beineke*, Indiana University-Purdue University, Ft.\ Wayne
      Frank Harary, New Mexico State University, Las Cruces
      (855-05-114)
    • 8:30 a.m.
      A combinatorial approach to the integral multicommodity flow problem with application to the packed routing.
      F. Shahrokhi, North Texas University
      L. A. Sz\'ekely*, University of New Mexico
      (855-05-48)
    • 9:00 a.m.
      k-graphs with uniformly distributed subgraphs.
      F. R. K. Chung, Bell Communications Research, Morristown, NJ
      R. L. Graham*, AT&T Bell Laboratories, Murray Hill, New Jersey
      (855-05-87)
    • 9:30 a.m.
      Quasi-random classes of hypergraphs.
      Fan R. K. Chung*, Bellcore, Morristown, New Jersey
      (855-05-113)

  • Friday March 16, 1990, 8:00 a.m.-9:50 a.m.
    Special Session on Groups and Geometries, I
    Room 145, Cardwell Hall

    • 8:00 a.m.
      Extending morphisms of groups and graphs.
      Michael Aschbacher*, California Institute of Technology
      Yoav Segev, Ben Gurion University, Israel
      (855-20-152)
    • 8:30 a.m.
      A Cayley integer approach to the Leech lattice.
      George Glauberman*, University of Chicago
      (855-20-49)
    • 9:00 a.m.
      Applications of algebraic curves to the representation theory of SL_2.
      Geoffrey Mason*, University of California, Santa Cruz
      (855-20-18)
    • 9:30 a.m.
      Sharply transitive linear groups over algebraically closed fields.
      G. Cherlin, Rutgers University, New Brunswick
      T. Grundh\"ofer, University T\"ubingen, Federal Republic of Germany
      A. Nesin, University of California, Irvine
      H. Voelklein*, University of Florida
      (855-20-40)

  • Friday March 16, 1990, 8:00 a.m.-9:50 a.m.
    Special Session on Applications of Category Theory, I
    Room 103, Cardwell Hall

    • 8:00 a.m.
      Category-sorted algebra and its applications.
      David A. Schmidt*, Kansas State University
      (855-18-96)
    • 8:30 a.m.
      Compact pairs and generalized perfect maps.
      Eraldo Giuli*, Universit\`a degli Studi di L'Aquila, Italy
      (855-18-31)
    • 9:00 a.m.
      Groups of dualities.
      Georgi D. Dimov, Bulgarian Academy of Sciences, Bulgaria
      Walter Tholen*, York University
      (855-18-29)
    • 9:30 a.m.
      Internal description of hulls.
      Friedhelm Schwarz, University of Toledo
      Sibylle Weck-Schwarz*, University of Toledo
      (855-18-86)

  • Friday March 16, 1990, 8:00 a.m.-9:30 a.m.
    Session on Algebra
    Room 120, Cardwell Hall

    • 8:00 a.m.
      Rings of integer-valued polynomials over semi-local PID's.
      Jim Brewer*, Florida Atlantic University
      Lee Klingler, Florida Atlantic University
      (855-13-52)
    • 8:20 a.m.
      The Picard group for the commutative ring theorist.
      F. W. Call*, University of Michigan, Ann Arbor
      R. Heitmann, University of Texas, Austin
      (855-13-24)
    • 8:40 a.m.
      Gr\"obner bases and automorphisms of polynomial ring.
      Wei Li*, Purdue University, West Lafayette
      (855-13-08)
    • 9:00 a.m.
      Infinitesimal extensions of glued varieties.
      Khomo T. S. Mohapeloa*, Pennsylvania State University, McKeesport, PA
      (855-14-183)
    • 9:20 a.m.
      On an extremal problem in the Bloch space.
      Flavia Colonna*, George Mason University
      (855-30-89)

  • Friday March 16, 1990, 10:00 a.m.-11:00 a.m.
    Invited Address
    Modular forms and the Riemann zeta-function.
    Room 101, Cardwell Hall
    J. Brian Conrey*, Oklahoma State University
    (855-11-173)

  • Friday March 16, 1990, 12:30 p.m.-1:30 p.m.
    Invited Address
    Representation theory and stable homotopy of finite groups.
    Room 101, Cardwell Hall
    Stewart B. Priddy*, Northwestern University
    (855-55-184)

  • Friday March 16, 1990, 2:00 p.m.-4:50 p.m.
    Special Session on Harmonic Analysis and Probability Theory, II
    Room 131, Cardwell Hall

    • 2:00 p.m.
      Intrinsic ultracontractivity and eigenfuction estimates for the Schrodinger operators.
      Rodrigo Ba\~nuelos*, Purdue University, West Lafayette
      (855-31-36)
    • 2:30 p.m.
      Distribution function inequalities for the density of the area integral.
      Rodrigo Ba\~nuelos, Purdue University, West Lafayette
      Charles Moore*, Purdue University, West Lafayette
      (855-31-141)
    • 3:00 p.m.
      On the almost sure behavior of sums of iid random variables in Hilbert space.
      Uwe Einmahl*, Indiana University, Bloomington
      (855-60-68)
    • 3:30 p.m.
      On weak convergence in dynamical systems to self-similar processes.
      Michael Lacey*, Indiana University, Bloomington
      (855-60-54)
    • 4:00 p.m.
      Ergodic averages on spheres.
      Roger L. Jones*, DePaul University
      (855-42-70)
    • 4:30 p.m.
      Almost everywhere convergence of convolution powers.
      A. Bellow, Northwestern University
      R. Jones, DePaul University
      Joseph Rosenblatt*, Ohio State University, Columbus
      (855-60-157)

  • Friday March 16, 1990, 2:00 p.m.-4:20 p.m.
    Special Session on Orthostructures, II
    Room 121, Cardwell Hall

    • 2:00 p.m.
      Filters in orthoalgebras and their relationship to supports in test spaces.
      Andrew S. Golfin, Jr.*, Gettysburg College
      (855-06-163)
    • 2:30 p.m.
      Coupled entities.
      David J. Foulis*, University of Massachusetts, Amherst
      (855-81-162)
    • 3:00 p.m.
      Refinement and unique Mackey decomposition for manuals and orthoalgebras.
      Matthew B. Younce*, Rhode Island College
      (855-06-56)
    • 3:30 p.m.
      sigma-manuals.
      Alexander Wilce*, University of New Hampshire
      (855-06-160)
    • 4:00 p.m.
      Convergence of observables on quantum logics.
      Stanley Gudder*, University of Denver
      (855-06-03)

  • Friday March 16, 1990, 2:00 p.m.-4:20 p.m.
    Special Session on Numerical Analysis, I
    Room 122, Cardwell Hall

    • 2:00 p.m.
      Vortex dynamics of hovering mode.
      Karl Gustafson*, University of Colorado, Boulder
      (855-65-05)
    • 2:30 p.m.
      Quasimolecular fluid modeling.
      Donald Greenspan*, University of Texas, Arlington
      (855-65-78)
    • 3:00 p.m.
      Lyapunov-Schmidt reduction for the crossing of two neutral curves in Taylor-Couette flow.
      John H. Bolstad*, University of California, Livermore
      Michael E. Henderson, IBM T. J. Watson Research Center, Yorktown Heights, New York
      (855-65-77)
    • 3:30 p.m.
      Bifurcation of periodic solutions of singularly perturbed delay differential equation.
      Abdullah J. Tamraz*, Wichita State University
      (855-65-128)
    • 4:00 p.m.
      Numerical computation of water waves in a potential flow.
      C. H. Su*, Brown University
      (855-65-76)

  • Friday March 16, 1990, 2:00 p.m.-5:20 p.m.
    Special Session on Geometric Function Theory, II
    Room 144, Cardwell Hall

    • 2:00 p.m.
      On some almost everywhere overdetermined boundary value problems.
      John Lewis*, University of Kentucky
      Andrew Vogel, University of Kentucky
      (855-31-22)
    • 2:30 p.m.
      Note on A_infinity and level sets of conformal mappings.
      Juha Heinonen*, University of Michigan, Ann Arbor
      (855-30-102)
    • 3:00 p.m.
      The Dirichlet problem for the infinity-Laplacian.
      Tilak Bhattacharya, Northwestern University
      Emanuelle DiBenedetto, Northwestern University
      Juan Manfredi*, University of Pittsburgh, Pittsburgh
      (855-35-116)
    • 3:30 p.m.
      Composition operators and angular derivatives.
      Tom Carroll*, Purdue University, West Lafayette
      (855-30-140)
    • 4:00 p.m.
      Discrete quasiconformal groups with small dilatation.
      M. Jean McKemie*, St. Edward's University
      (855-30-94)
    • 4:30 p.m.
      Boundary values for some classes of functions.
      Enrique Villamor*, Florida International University
      (855-30-115)
    • 5:00 p.m.
      Generalised conformal welding.
      David H. Hamilton*, University of Maryland, College Park
      (855-30-57)

  • Friday March 16, 1990, 2:00 p.m.-4:50 p.m.
    Special Session on Partial Differential Equations, II
    Room 129, Cardwell Hall

    • 2:00 p.m.
      A Riemann-Lebesque lemma for mathematical ecology.
      Robert Stephen Cantrell*, University of Miami
      Chris Cosner, University of Miami
      (855-35-125)
    • 2:30 p.m.
      Positive solutions of systems of nonlinear eigenvalue problems.
      Nela Lako\v s*, Ohio State University, Columbus
      (855-35-182)
    • 3:00 p.m.
      Minimal solutions of superlinear equations.
      Allan Edelson*, University of California, Davis
      (855-35-194)
    • 3:30 p.m.
      Semilinear elliptic problems at resonance -- some space dimension dependent results.
      Renate Schaaf*, University of Utah
      Klaus Schmitt, University of Utah
      (855-35-100)
    • 4:00 p.m.
      Towards a theory for quasilinear PDEs in structured population dynamics.
      Horst R. Thieme*, Arizona State University
      (855-35-199)
    • 4:30 p.m.
      Rearrangements and vorticity.
      Alan Elcrat*, Wichita State University
      Kenneth Miller, Wichita State University
      (855-34-84)

  • Friday March 16, 1990, 2:00 p.m.-4:50 p.m.
    Special Session on Commutative Algebra, II
    Room 102, Cardwell Hall

    • 2:00 p.m.
      Curve singularities of finite Cohen-Macaulay type.
      Roger Wiegand*, University of Nebraska, Lincoln
      (855-13-197)
    • 2:30 p.m.
      Local cohomology of Rees algebras and Hilbert functions.
      Bernard Johnston*, Louisiana State University, Baton Rouge
      Jugal Verma, Louisiana State University, Baton Rouge
      (855-13-144)
    • 3:00 p.m.
      Modules with linear syzygies.
      David Eisenbud, Brandeis University
      Jee Koh*, Indiana University, Bloomington
      (855-13-143)
    • 3:30 p.m.
      Etale cohomology and the topology of algebraic varieties.
      Gennady Lyubeznik*, University of Chicago
      (855-14-142)
    • 4:00 p.m.
      Unmixed local rings of type two are Cohen-Macaulay.
      Thomas Marley*, University of Nebraska, Lincoln
      (855-13-176)
    • 4:30 p.m.
      Canonical resolution of hypersurface singularities of characteristic zero.
      T. T. Moh*, Purdue University, West Lafayette
      (855-13-177)

  • Friday March 16, 1990, 2:00 p.m.-4:30 p.m.
    Special Session on Inverse Problems and Scattering Theory, II
    Room 143, Cardwell Hall

    • 2:00 p.m.
      Inverse scattering at fixed energy in three dimensions.
      A. G. Ramm*, University of Kansas
      (855-35-27)
    • 2:55 p.m.
      Two inverse problems for partial differential equations.
      Mikhail V. Klibanov*, Courant Institute of Mathematical Sciences, New York University
      (855-35-63)
    • 3:50 p.m.
      Clifford Tori and overdetermined problems.
      Carlos Berenstein*, University of Maryland, College Park
      Max Karlovitz, University of Maryland, College Park
      (855-35-60)

  • Friday March 16, 1990, 2:00 p.m.-4:20 p.m.
    Special Session on Ergodic Theory, II
    Room 130, Cardwell Hall

    • 2:00 p.m.
      Cayley graphs and recurrence in dynamical systems.
      Alan Forrest*, Ohio State University, Columbus
      (855-28-38)
    • 2:30 p.m.
      Some remarks on the convergence of weighted ergodic averages.
      I. Kornfeld*, North Dakota State University
      (855-28-149)
    • 3:00 p.m.
      Random sampling of stationary processes.
      Karl Petersen*, University of North Carolina, Chapel Hill
      (855-28-62)
    • 3:30 p.m.
      On almost everywhere convergence of convolution powers in L^1(X).
      Karin Reinhold-Larsson*, Ohio State University, Columbus
      (855-28-148)
    • 4:00 p.m.
      Two applications of a theorem on invariant measures for multiplication.
      Daniel J. Rudolph*, University of Maryland, College Park
      (855-28-181)

  • Friday March 16, 1990, 2:00 p.m.-4:20 p.m.
    Special Session on Graph Theory, II
    Room 146, Cardwell Hall

    • 2:00 p.m.
      Unavoidable subgraphs of sparse graphs: Lagniappe.
      C. A. Barefoot, University of New Mexico
      L. H. Clark, University of New Mexico
      R. C. Entringer*, University of New Mexico
      A. A. Kooshesh, University of New Mexico
      L. A. Sz\'ekely, University of New Mexico
      (855-05-75)
    • 2:30 p.m.
      Homomorphisms with the lifting property.
      Bennet Manvel*, Colorado State University
      Richard Osborne, Colorado State University
      (855-05-93)
    • 3:00 p.m.
      A prime number theorem for normed graphs.
      Robin J. Wilson*, Open University, England
      (855-05-112)
    • 3:30 p.m.
      Size and independence in triangle-free graphs with fixed maximum degree.
      Kathryn F. Jones*, University of Colorado
      (855-05-88)
    • 4:00 p.m.
      An upper bound for the average number of regions.
      Saul Stahl*, University of Kansas
      (855-05-21)

  • Friday March 16, 1990, 2:00 p.m.-3:50 p.m.
    Special Session on Groups and Geometries, II
    Room 145, Cardwell Hall

    • 2:00 p.m.
      High-weight modules for quotients of affine buildings.
      Stephen D. Smith*, University of Illinois, Chicago
      (855-20-11)
    • 2:30 p.m.
      Ru less < E_7(5).
      Ulrich Meierfrankenfeld*, Michigan State University
      (855-20-159)
    • 3:00 p.m.
      Groups generated by 3-transpositions.
      Jonathan I. Hall*, Michigan State University
      (855-20-107)
    • 3:30 p.m.
      Informal Discussion

  • Friday March 16, 1990, 2:00 p.m.-4:20 p.m.
    Special Session on Applications of Category Theory, II
    Room 103, Cardwell Hall

    • 2:00 p.m.
      Categorical foundations and set theory.
      Saunders Mac Lane*, University of Chicago
      (855-18-15)
    • 2:30 p.m.
      Does anybody really know what a Hopf algebra is?
      Robert Pare*, Dalhousie University
      (855-18-42)
    • 3:00 p.m.
      Metatheory of Boolean categories.
      Ernest G. Manes*, University of Massachusetts, Amherst
      (855-18-35)
    • 3:30 p.m.
      Weak adjunctions between categories of CPO's.
      Michael W. Mislove, Tulane University
      Frank J. Oles*, University of Pennsylvania and IBM T. J. Watson Research Center, Yorktown Heights, New York
      (855-68-127)
    • 4:00 p.m.
      Completions of continuous posets and modules of concurrency.
      Michael W. Mislove*, Tulane University
      (855-68-192)

  • Friday March 16, 1990, 2:00 p.m.-3:30 p.m.
    General Session
    Room 120, Cardwell Hall

    • 2:00 p.m.
      The value of certain determinants with elements zero and one.
      Dale Woods*, Central State University
      D. J. Boyce, Central State University
      (855-15-136)
    • 2:20 p.m.
      Total cosine of normal matrices.
      Morteza Seddighin*, Panhandle State University
      (855-15-147)
    • 2:40 p.m.
      Expansions of chromatic polynomials and log-concavity.
      Francesco Brenti*, University of Michigan, Ann Arbor
      (855-05-41)
    • 3:00 p.m.
      An inverse convolution method for regular parabolic equations.
      B. A. Mair*, University of Florida
      D. S. Gilliam, Texas Tech University
      C. F. Martin, Texas Tech University
      (855-35-45)
    • 3:20 p.m.
      Badug tablet.
      Myungkark Park*, Prompter Publications, Cincinnati, Ohio
      (855-11-201)

Saturday March 17, 1990

  • Saturday March 17, 1990, 7:00 a.m.-9:50 a.m.
    Special Session on Geometric Function Theory, III
    Room 144, Cardwell Hall

    • 7:00 a.m.
      A maximum principle for the Bergman space.
      Boris Korenblum*, State University of New York, Albany
      (855-30-04)
    • 7:30 a.m.
      Maximal functions, A_infinity-measures and quasiconformal maps.
      Susan G. Staples*, University of Texas, Austin
      (855-30-104)
    • 8:00 a.m.
      The quasihyperbolic metric is exponentially integrable on H\"older domains in R^n.
      Wayne Smith, University of Washington
      David A. Stegenga*, University of Hawaii, Honolulu
      (855-30-110)
    • 8:30 a.m.
      The boundary distributions of analytic functions on the disc.
      Carl Sundberg*, University of Tennessee, Knoxville
      (855-30-135)
    • 9:00 a.m.
      The BMOA-distance of a function from VMOA.
      David Stegenga, University of Hawaii, Manoa
      Kenneth Stephenson*, University of Tennessee, Knoxville
      (855-30-134)
    • 9:30 a.m.
      The Cauchy integral operator and the eigenvalue problem for the Laplacian.
      Dmitry Khavinson*, University of Arkansas, Fayetteville
      J. M. Anderson, University College, England
      Victor Lomonosov, Moscow, USSR
      (855-30-10)

  • Saturday March 17, 1990, 7:00 a.m.-9:20 a.m.
    Special Session on Partial Differential Equations, III
    Room 129, Cardwell Hall

    • 7:00 a.m.
      Fully nonlinear parabolic boundary value problems in higher space dimensions, II.
      Chin-Yuan Lin*, Texas A & M University, College Station
      (855-35-53)
    • 7:30 a.m.
      Bifurcation turning points in combustion equations.
      Karl Gustafson*, University of Colorado, Boulder
      (855-35-06)
    • 8:00 a.m.
      Optimal control for elliptic Volterra-Lotka type equations.
      Anthony Leung*, University of Cincinnati
      Srdjan Stojanovic, University of Cincinnati
      (855-35-154)
    • 8:30 a.m.
      Reaction-diffusion models and elliptic eigenvalue problems.
      Chris Cosner*, University of Miami
      (855-35-155)
    • 9:00 a.m.
      The wave equation with nonlinear boundary conditions.
      Irena Lasiecka, University of Virginia
      Andreas Stahel*, University of Utah
      (855-35-153)

  • Saturday March 17, 1990, 7:00 a.m.-9:50 a.m.
    Special Session on Graph Theory, III
    Room 146, Cardwell Hall

    • 7:00 a.m.
      Edge-graceful cubic graphs.
      John Watkins*, Colorado College
      (855-05-91)
    • 7:30 a.m.
      Ramsey problems and their relation to Turan type extremal problems.
      R. J. Faudree*, Memphis State University
      M. Simonovits, Hungarian Academy of Sciences, Hungary
      (855-05-111)
    • 8:00 a.m.
      On peripheral vertices in graphs.
      Gary Chartrand*, Western Michigan University
      Garry Johns, Saginaw Valley State University
      Ortrud R. Oellermann, University of Natal, South Africa
      (855-05-92)
    • 8:30 a.m.
      Some unconventional games on graphs.
      Paul Erd\"os*, Hungarian Academy of Sciences, Hungary
      (855-05-65)
    • 9:00 a.m.
      Minimum Boolean factorization of tournament codes.
      Greg Bain, University of Colorado, Denver
      J. Richard Lundgren*, University of Colorado, Denver
      John S. Maybee, University of Colorado, Boulder
      (855-05-71)
    • 9:30 a.m.
      The dimension of a random partial order of height one.
      W. T. Trotter*, Arizona State University
      H. Kierstead, Arizona State University
      P. Erd\"os, Hungarian Academy of Sciences, Hungary
      (855-05-101)

  • Saturday March 17, 1990, 7:00 a.m.-9:50 a.m.
    Special Session on Groups and Geometries, III
    Room 145, Cardwell Hall

    • 7:00 a.m.
      Affine cap lambda-buildings.
      Curtis Bennett*, University of Chicago
      (855-51-66)
    • 7:30 a.m.
      Extended generalized polygons.
      Richard Weiss*, Tufts University
      (855-20-13)
    • 8:00 a.m.
      The embeddings of flag-transitive classical locally polar geometries of rank 3.
      Satoshi Yoshiara*, Tufts University
      (855-51-34)
    • 8:30 a.m.
      Embeddings of polar spaces.
      Peter M. Johnson*, Wayne State University
      (855-51-172)
    • 9:00 a.m.
      Locally polar spaces with affine planes.
      Hans Cuypers*, Michigan State University
      Antonio Pasini, University of Naples, Italy
      (855-51-106)
    • 9:30 a.m.
      Totally irregular collineation groups.
      Chat Yin Ho*, University of Florida
      (855-20-23)

  • Saturday March 17, 1990, 7:30 a.m.-9:50 a.m.
    Special Session on Commutative Algebra, III
    Room 102, Cardwell Hall

    • 7:30 a.m.
      Strongly regular ring.
      Budh Nashier*, Florida State University
      (855-13-122)
    • 8:00 a.m.
      Conormal bundle of determinantal curves.
      A. Prabhakar Rao*, University of Missouri, St.\ Louis
      (855-14-178)
    • 8:30 a.m.
      Rings with low dimensional formal fibres.
      Christel Rotthaus*, Michigan State University
      (855-13-16)
    • 9:00 a.m.
      Space curves as complete intersection.
      Avinash Sathaye*, University of Kentucky
      Jon Stenerson, University of Kentucky
      (855-14-195)
    • 9:30 a.m.
      Zero cycles and the number of generators of modules.
      M. P. Murthy*, University of Chicago
      (855-13-123)

  • Saturday March 17, 1990, 7:30 a.m.-9:50 a.m.
    Special Session on Inverse Problems and Scattering Theory, III
    Room 143, Cardwell Hall

    • 7:30 a.m.
      Inversion of the backscatter data in the 3D potential scattering problem.
      Reese T. Prosser*, Dartmouth College
      (855-81-156)
    • 8:20 a.m.
      Inverse spectral theory in one and two dimensions.
      Roger Knobel, Rensselaer Polytechnic Institute
      Joyce R. McLaughlin*, Rensselaer Polytechnic Institute
      (855-34-174)
    • 9:10 a.m.
      On an inverse boundary value problem in two dimensions.
      Ziqi Sun*, University of Washington
      (855-35-01)

  • Saturday March 17, 1990, 8:00 a.m.-9:50 a.m.
    Special Session on Harmonic Analysis and Probability Theory, III
    Room 131, Cardwell Hall

    • 8:00 a.m.
      Another lacunarity property for Fourier series.
      Kenneth A. Ross*, University of Oregon
      (855-43-55)
    • 8:30 a.m.
      A homomorphism theorem for maximal multiplier transforms.
      Nakhle' Asmar*, University of Missouri, Columbia
      Earl Berkson, University of Illinois, Urbana-Champaign
      T. Alastair Gillespie, University of Edinburgh, Scotland
      (855-43-17)
    • 9:00 a.m.
      Theta function of a Riemannian manifold with boundary.
      Pei Hsu*, Northwestern University
      (855-58-64)
    • 9:30 a.m.
      The angular part of Brownian motion on negatively curved Riemannian manifolds.
      Anton Thalmaier*, University of Texas, Austin
      (855-60-99)

  • Saturday March 17, 1990, 8:00 a.m.-9:50 a.m.
    Special Session on Orthostructures, III
    Room 121, Cardwell Hall

    • 8:00 a.m.
      Constructible hypergraphs.
      Christian Schindler*, University of Denver
      (855-05-186)
    • 8:30 a.m.
      Generalized measure theory on orthostructures.
      Gottfried T. R\"uttimann*, University of Bern, Switzerland
      (855-28-167)
    • 9:00 a.m.
      An undecidability result in lattice theory.
      Otmar Spinas*, Mathematisches Institut Universit\"at Z\"urich, Switzerland
      (855-06-169)
    • 9:30 a.m.
      Maximum likelihood estimation on quasimanuals.
      Matthias P. Kl\"ay*, Sandoz AG, Switzerland
      David J. Foulis, University of Massachusetts, Amherst
      (855-60-165)

  • Saturday March 17, 1990, 8:00 a.m.-9:50 a.m.
    Special Session on Numerical Analysis, II
    Room 122, Cardwell Hall

    • 8:00 a.m.
      Series expansions for solitary waves.
      Steve Pennell*, University of Lowell
      (855-65-79)
    • 8:30 a.m.
      Simulations of incompressible flows containing interfaces using front tracking methods.
      Gretar Tryggvason*, University of Michigan, Ann Arbor
      Ozen Unverdi, University of Michigan, Ann Arbor
      Kahled Sbeih, University of Michigan, Ann Arbor
      (855-65-82)
    • 9:00 a.m.
      A second-order accurate scheme for the incompressible Navier-Stokes equations.
      John Strikwerda*, University of Wisconsin, Madison
      (855-65-80)
    • 9:30 a.m.
      A new class of nonoscillatory discontinuous Galerkin finite element methods for conservation laws in multidimensions.
      Bernardo Cockburn, University of Minnesota, Minneapolis
      Suchung Hou, University of Minnesota, Minneapolis
      Chi-Wang Shu*, Brown University
      (855-65-81)

  • Saturday March 17, 1990, 8:00 a.m.-9:50 a.m.
    Special Session on Ergodic Theory, III
    Room 130, Cardwell Hall

    • 8:00 a.m.
      On the converse of the dominated ergodic theorem.
      Laszlo I. Szabo*, Ohio State University, Columbus
      (855-28-97)
    • 8:30 a.m.
      Measures with prescribed marginals, extreme points and measure preserving transformations.
      M. B. Rao*, North Dakota State University
      K. Subramanyam, University of North Carolina, Wilmington
      (855-28-151)
    • 9:00 a.m.
      Almost everywhere divergence and the "strong sweeping out property".
      Alexandra Bellow*, Northwestern University
      (855-28-105)
    • 9:30 a.m.
      Weak sequential compactness and a. e. convergence of Cesaro averages.
      Dogan Comez*, North Dakota State University
      (855-47-150)

  • Saturday March 17, 1990, 8:00 a.m.-9:50 a.m.
    Special Session on Applications of Category Theory, III
    Room 103, Cardwell Hall

    • 8:00 a.m.
      Topological Eilenberg-Moore algebras.
      Sergio Salbany*, University of Zimbabwe, Zimbabwe
      D. Pumpl\"un, Fern Universit\"at Hagen, Federal Republic of Germany
      (855-18-28)
    • 8:30 a.m.
      Regular closure operators and compactness.
      Gabriele Castellini*, University of Puerto Rico, Mayag\"uez
      (855-18-19)
    • 9:00 a.m.
      Appropriate domains for infinite dimensional calculus.
      L. D. Nel*, Carleton University
      (855-58-30)
    • 9:30 a.m.
      Special objects in the category of cap gamma-convex spaces.
      Helmut Rohrl*, La Jolla, California
      (855-18-20)

  • Saturday March 17, 1990, 10:00 a.m.-11:00 a.m.
    Invited Address
    Examples of Cauchy-Riemann structures.
    Room 101, Cardwell Hall
    Jean-Pierre Rosay*, University of Wisconsin, Madison
    (855-32-202)

  • Saturday March 17, 1990, 12:30 p.m.-1:30 p.m.
    Invited Address
    Harmonic measure and applications.
    Room 101, Cardwell Hall
    Jang-Mei Wu*, University of Illinois, Urbana-Champaign
    (855-30-90)

  • Saturday March 17, 1990, 2:00 p.m.-4:20 p.m.
    Special Session on Harmonic Analysis and Probability Theory, IV
    Room 131, Cardwell Hall

    • 2:00 p.m.
      Nonexplosion of a stochastic partial differential equation.
      Carl Mueller*, University of Rochester
      (855-60-189)
    • 2:30 p.m.
      Gradient estimates using coupling.
      Michael Cranston*, University of Rochester
      (855-60-108)
    • 3:00 p.m.
      Exponentially fast uniform convergence in one dimensinal stochastic Ising models.
      Richard Holley*, University of Colorado, Boulder
      Dan Stroock, Massachusetts Institute of Technology
      (855-60-44)
    • 3:30 p.m.
      Lifetime distribution of h processes.
      Burgess Davis*, Purdue University, West Lafayette
      (855-60-67)
    • 4:00 p.m.
      Sharp square-function inequalities for conditionally symmetric martingales.
      Gang Wang*, Purdue University, West Lafayette
      (855-60-09)

  • Saturday March 17, 1990, 2:00 p.m.-3:50 p.m.
    Special Session on Orthostructures, IV
    Room 121, Cardwell Hall

    • 2:00 p.m.
      Profinite orthomodular lattices.
      Tae Ho Choe*, McMaster University
      Richard J. Greechie, Kansas State University
      (855-06-50)
    • 2:30 p.m.
      Blocks and commutators in orthomodular lattices.
      G\"unter Bruns, McMaster University
      Richard Greechie*, Kansas State University
      (855-06-164)
    • 3:00 p.m.
      Orthomodular structures from sesquilinear forms.
      Robert Piziak*, Baylor University
      (855-06-166)
    • 3:30 p.m.
      A method of constructing orthomodular lattices.
      John R. Harding*, McMaster University
      (855-06-168)

  • Saturday March 17, 1990, 2:00 p.m.-3:50 p.m.
    Special Session on Numerical Analysis, III
    Room 122, Cardwell Hall

    • 2:00 p.m.
      A least-squares finite element method for Helmholtz equation.
      Ching Lung Chang*, Cleveland State University
      (855-35-83)
    • 2:30 p.m.
      Numerical simulation of gas-solid fluid flows.
      Yue-Kuen Kwok*, San Jose State University
      (855-65-46)
    • 3:00 p.m.
      Lattice gas automata -- a new method for solving the Navier-Stokes equations.
      Shiyi Chen*, Los Alamos National Laboratory
      Gary D. Doolen, Los Alamos National Laboratory
      (855-65-129)
    • 3:30 p.m.
      A comparison of some numerical conformal mapping methods for exterior regions.
      Thomas K. DeLillo*, Wichita State University
      Alan R. Elcrat, Wichita State University
      (855-65-130)

  • Saturday March 17, 1990, 2:00 p.m.-5:20 p.m.
    Special Session on Geometric Function Theory, IV
    Room 144, Cardwell Hall

    • 2:00 p.m.
      Goluzin inequalities and minimum energy for mappings onto nonoverlapping regions.
      P. L. Duren*, University of Michigan, Ann Arbor
      M. M. Schiffer, Stanford University
      (855-30-58)
    • 2:30 p.m.
      On a fixed area problem.
      Y. J. Leung*, University of Delaware
      (855-30-175)
    • 3:00 p.m.
      Linear invariance and uniform local univalence.
      Wancang Ma, University of Cincinnati
      David Minda*, University of Cincinnati
      (855-30-198)
    • 3:30 p.m.
      Extremal distance and quasiconformal circle domains.
      David A. Herron*, University of Cincinnati
      Pekka Koskela, University of Jyv\"askyl\"a, Finland
      (855-30-117)
    • 4:00 p.m.
      Some numerical calculations related to the Riemann Hypothesis.
      Karl Barth*, Syracuse University
      (855-30-120)
    • 4:30 p.m.
      Iteration and zeros of the second derivative.
      A. Hinkkanen*, University of Texas, Austin
      (855-30-103)
    • 5:00 p.m.
      Real zeros of the second derivative of the reciprocal of an entire function.
      George Csordas, University of Hawaii, Honolulu
      Wayne Smith*, University of Hawaii, Honolulu
      Jack Williamson, University of Hawaii, Honolulu
      (855-30-133)

  • Saturday March 17, 1990, 2:00 p.m.-3:50 p.m.
    Special Session on Partial Differential Equations, IV
    Room 129, Cardwell Hall

    • 2:00 p.m.
      Existence of travelling wave solutions for an evolutionary ecology model.
      Roger Lui*, University of Utah
      (855-35-33)
    • 2:30 p.m.
      Slow motion manifolds for the Cahn-Hilliard equation in 1 space dimension.
      Nicholas D. Alikakos*, University of Tennessee, Knoxville
      (855-35-203)
    • 3:00 p.m.
      Informal Discussion

  • Saturday March 17, 1990, 2:00 p.m.-4:50 p.m.
    Special Session on Commutative Algebra, IV
    Room 102, Cardwell Hall

    • 2:00 p.m.
      Linear triangularization of homogeneous polynomial maps.
      David Wright*, Washington University
      (855-13-98)
    • 2:30 p.m.
      Ranks of indecomposable modules over one-dimensional rings, II.
      Leo Chouinard, University of Nebraska, Lincoln
      Sylvia Wiegand*, University of Nebraska, Lincoln
      (855-13-158)
    • 3:00 p.m.
      On the structure of certain normal ideals.
      Craig Huneke, Purdue University, West Lafayette
      Wolmer Vasconcelos, Rutgers University, New Brunswick
      Bernd Ulrich*, Michigan State University
      (855-13-119)
    • 3:30 p.m.
      Rees algebras of two-dimensional Cohen-Macaulay local rings.
      Jugal Verma*, Louisiana State University, Baton Rouge
      (855-13-145)
    • 4:00 p.m.
      Divisorial properties of the canonical module for invariant subrings.
      Dana T. Weston*, University of Missouri, Columbia
      (855-13-32)
    • 4:30 p.m.
      On the non-existence of a minimal algebra resolution despite vanishing of Avramov obstructions.
      Hema Srinivasan*, University of Missouri, Columbia
      (855-13-121)

  • Saturday March 17, 1990, 2:00 p.m.-4:20 p.m.
    Special Session on Inverse Problems and Scattering Theory, IV
    Room 143, Cardwell Hall

    • 2:00 p.m.
      Informal Discussion

  • Saturday March 17, 1990, 2:00 p.m.-3:50 p.m.
    Special Session on Ergodic Theory, IV
    Room 130, Cardwell Hall

    • 2:00 p.m.
      Multiparameter and subsequence ergodic theorems.
      James H. Olsen*, North Dakota State University
      (855-47-131)
    • 2:30 p.m.
      Mixing examples in the class of piecewise continuous and expanding interval maps.
      Christopher Bose*, University of Victoria
      (855-28-124)
    • 3:00 p.m.
      Polynomial van der Waerden implies polynomial Szemeredi.
      Vitaly Bergelson*, Ohio State University, Columbus
      (855-28-180)
    • 3:30 p.m.
      Counterexamples from Gaussian automorphisms.
      Andr\'es del Junco*, University of Toronto
      (855-28-190)

  • Saturday March 17, 1990, 2:00 p.m.-4:50 p.m.
    Special Session on Groups and Geometries, IV
    Room 145, Cardwell Hall

    • 2:00 p.m.
      Generalized quadrangles with s=t^2: A survey of recent results.
      Stanley E. Payne*, University of Colorado, Denver
      (855-51-126)
    • 2:30 p.m.
      Skeletons of conical flocks.
      Norman L. Johnson*, University of Iowa
      (855-51-26)
    • 3:00 p.m.
      Generalized quadrangles in p-groups.
      Diane Herrmann*, University of Chicago
      (855-20-132)
    • 3:30 p.m.
      Restrictions on groups with a Kantor family.
      Xu Ming Chen, Wayne State University
      Daniel Frohardt*, Wayne State University
      (855-20-171)
    • 4:00 p.m.
      Orthogonal resolutions of designs.
      Spyros S. Magliveras*, University of Nebraska, Lincoln
      (855-05-61)
    • 4:30 p.m.
      Informal Discussion

  • Saturday March 17, 1990, 2:00 p.m.-4:20 p.m.
    Special Session on Applications of Category Theory, IV
    Room 103, Cardwell Hall

    • 2:00 p.m.
      An internal characterization of Beta.
      Guenther E. Richter*, University of Bielefeld, Federal Republic of Germany
      (855-18-25)
    • 2:30 p.m.
      Enriched category theory based on relations.
      Jurgen Koslowski*, Macalester College
      (855-18-47)
    • 3:00 p.m.
      A-epimorphisms, diagonal-separation, and disconnectedness.
      Harriet M. Lord*, California State Polytechnic University
      (855-18-14)
    • 3:30 p.m.
      Topological universe hulls inside the category of pseudotopological spaces.
      Friedhelm Schwarz*, University of Toledo
      (855-18-85)
    • 4:00 p.m.
      Completely regular spaces.
      H. L. Bentley*, University of Toledo
      E. Lowen-Colebunders, Free University of Brussels, Belgium
      (855-54-59)
Inquiries:  meet@ams.org