George Kamberov, Stevens Institute of Technology, Hoboken, NJ, Peter Norman and Franz Pedit, University of Massachusetts, Amherst, MA, and Ulrich Pinkall, Technische Universitat, Berlin, Germany

Quaternions, Spinors, and Surfaces

Expected publication date is October 9, 2002

Description
Many problems in pure and applied mathematics boil down to determining the shape of a surface in space or constructing surfaces with prescribed geometric properties. These problems range from classical problems in geometry, elasticity, and capillarity to problems in computer vision, medical imaging, and graphics. There has been a sustained effort to understand these questions, but many problems remain open or only partially solved. These include determining the shape of a surface from its metric and mean curvature (Bonnet's problem), determining an immersion from the projectivised Gauss map (Christoffel's problem) and its applications to the computer vision problem on recovering shape from shading, the construction of surfaces with prescribed curvature properties, constructing extremal surfaces and interfaces, and representing surface deformations. This book studies these questions by presenting a theory applying to both global and local questions and emphasizing conformal immersions rather than isometric immersions.

The book offers:

A unified and comprehensive presentation of the quaternionic and spinor approach to the theory of surface immersions in three and four dimensional space.
New geometric invariants of surfaces in space and new open problems.
A new perspective and new results on the classical geometric problems of surface and surface shape recognition and surface representation.
A source of problems to motivate research and dissertations.
Applications in computer vision and computer graphics.
Proofs of many results presented by the authors at colloquia, conferences, and congresses over the past two years.
This book describes how to use quaternions and spinors to study conformal immersions of Riemann surfaces into Bbb R^3. The first part develops the necessary quaternionic calculus on surfaces, its application to surface theory and the study of conformal immersions and spinor transforms. The integrability conditions for spinor transforms lead naturally to Dirac spinors and their application to conformal immersions. The second part presents a complete spinor calculus on a Riemann surface, the definition of a conformal Dirac operator, and a generalized Weierstrass representation valid for all surfaces. This theory is used to investigate first, to what extent a surface is determined by its tangent plane distribution, and second, to what extent curvature determines the shape.

The book is geared toward graduate students and research mathematicians interested in differential geometry and geometric analysis and its applications, computer science, computer vision, and computer graphics.

Contents

Conformal immersions via quaternions
Quaternionic calculus and immersions
Applications
Surfaces and Dirac spinors
Spinor algebra
Dirac spinors and conformal immersions
Bibliography
Glossary of symbols
Index

Details:

Publisher: American Mathematical Society
Distributor: American Mathematical Society
Series: Contemporary Mathematics, Volume: 299
Publication Year: 2002
ISBN: 0-8218-1928-3
Paging: approximately 152 pp.
Binding: Softcover

Edited by: Franz-Viktor Kuhlmann, Salma Kuhlmann, and Murray Marshall,
University of Saskatchewan, Saskatoon, SK, Canada

Valuation Theory and Its Applications, Volume I

Description

This book is the first of two proceedings volumes stemming from the International Conference and Workshop on Valuation Theory held at the University of Saskatchewan (Saskatoon, SK, Canada).

Valuation theory arose in the early part of the twentieth century in connection with number theory and has many important applications to geometry and analysis: the classical application to the study of algebraic curves and to Dedekind and Prufer domains; the close connection to the famous resolution of the singularities problem; the study of the absolute Galois group of a field; the connection between ordering, valuations, and quadratic forms over a formally real field; the application to real algebraic geometry; the study of noncommutative rings; etc. The special feature of this book is its focus on current applications of valuation theory to this broad range of topics. Also included is a paper on the history of valuation theory.

The book is suitable for graduate students and research mathematicians working in algebra, algebraic geometry, number theory, and mathematical logic.

Contents

S. S. Abhyankar -- Two step descent in modular Galois theory, theorems of Burnside and Cayley, and Hilbert's Thirteenth Problem
M.-E. Alonso and H. Lombardi -- Generalized Taylor formulae, computations in real closed valued fields and quantifier elimination
S. A. Basarab -- The arithmetic-arboreal residue structure of a Prufer domain, I
H.-H. Brungs and G. Torner -- Left valuation rings, left cones, and a question of Frege's
V. Cossart, O. Piltant, and A. J. Reguera-Lopez -- Divisorial valuations dominating rational surface singularities
T. C. Craven -- Valuations and Hermitian forms on skew fields
S. D. Cutkosky -- Resolution of morphisms
T. S. Gardener and H. Schoutens -- Rigid subanalytic sets
J. Grater -- Dubrovin valuation rings and orders in central simple algebras
H. G. Grundman and T. L. Smith -- Q-adequate bicyclic bicubic fields
D. Harbater, M. van der Put, and R. Guralnick -- Valued fields and covers in characteristic p, with an appendix by R. Guralnick
U. T. Hartl -- Line bundles on rigid analytic spaces
P. Hitzler and A. K. Seda -- The fixed-point theorems of Priess-Crampe and Ribenboim in logic programming
S. K. Khanduja -- The minimum property of Krasner's constant
H. Lombardi -- About Merckel's lemma
A. Prestel -- Bounds for representations of polynomials positive on compact semi-algebraic sets
A. Prestel and N. Schwartz -- Model theory of real closed rings
P. Roquette -- History of valuation theory--Part I
J. Schmid -- A density property for PpC-fields
M. van der Put -- Valuation theory in rigid geometry and curves over valuation rings
A. R. Wadsworth -- Valuation theory on finite dimensional division algebras

Details:

Publisher: American Mathematical Society
Distributor: American Mathematical Society
Series: Fields Institute Communications, Volume: 32
Publication Year: 2002
ISBN: 0-8218-2813-4
Paging: 449 pp.
Binding: Hardcover

Edited by: Vadim B. Kuznetsov, University of Leeds, UK

The Kowalevski Property

Description

This book is a collection of survey articles on several topics related to the general notion of integrability. It stems from a workshop on "Mathematical Methods of Regular Dynamics" dedicated to Sophie Kowalevski. Leading experts introduce corresponding areas in depth. The book provides a broad overview of research, from the pioneering work of the nineteenth century to the developments of the 1970s through the present.

The book begins with two historical papers by R. L. Cooke on Kowalevski's life and work. Following are 15 research surveys on integrability issues in differential and algebraic geometry, classical complex analysis, discrete mathematics, spinning tops, Painleve equations, global analysis on manifolds, special functions, etc. It concludes with Kowalevski's famous paper published in Acta Mathematica in 1889, "Sur le probleme de la rotation d'un corps solide autour d'un point fixe".

The book is suitable for graduate students in pure and applied mathematics, the general mathematical audience studying integrability, and research mathematicians interested in differential and algebraic geometry, analysis, and special functions.

Contents

R. L. Cooke -- The life of S. V. Kovalevskaya
R. L. Cooke -- Kovalevskaya's mathematical work
B. Enriquez -- The KZB connection: Parametrizations, flat sections and q-deformation
L. Gavrilov -- Jacobians of singularized spectral curves and completely integrable systems
L. Haine -- The q-hypergeometric equation, Askey-Wilson type solitons and rational curves with singularities
K. Hikami -- Quantum discrete soliton equations
E. I. Horozov -- Dual algebras of differential operators
J.-S. Hu and M. Yan -- A link between two fundamental contributions of Kowalevski
A. A. Kapaev -- Monodromy deformation approach to the scaling limit of the Painleve first equation
V. B. Kuznetsov -- Kowalevski top revisited
D. Markushevich -- Some algebro-geometric integrable systems versus classical ones
M. Mazzocco -- Painleve sixth equation as isomonodromic deformations equation of an irregular system
A. Nakayashiki and F. A. Smirnov -- Euler characteristics of theta divisors of Jacobians for spectral curves
E. Previato -- Reduction theory, elliptic solitons and integrable systems
T. Sasaki and M. Yoshida -- Schwarzian derivatives and uniformization
A. O. Smirnov -- Elliptic solitons and Heun's equation
V. V. Sokolov -- Generalized Kowalevski top: New integrable cases on e(3) and so(4)
Reprint of the Original Paper
S. Kowalevski -- Sur le probleme de la rotation d'un corps solide autour d'un point fixe

Details:

Publisher: American Mathematical Society
Distributor: American Mathematical Society
Series: CRM Proceedings & Lecture Notes, Volume: 32
Publication Year: 2002
ISBN: 0-8218-2885-1
Paging: 372 pp.
Binding: Softcover

Barry Cipra

What's Happening in the Mathematical Sciences

Expected publication date is August 25, 2002

Reviews of the Previous Volumes:

"This lively presentation of an amazingly wide spectrum of happenings in mathematics is impressive ... [this book] should be presented to a wide audience even outside mathematics, which could be fascinated by the ideas, concepts and beauty of the mathematical topics."
-- European Mathematical Society Newsletter

"The articles are very well written, and usually include quotes from the mathematicians who were involved in the work in question, giving the whole thing a more "human" feel. This book offers professionals a way to keep abreast of what's going on in the field and also gives us a way to share with our students and colleagues some of the excitement of doing mathematics. Don't miss it."
-- MAA Online

Description

Mathematicians like to point out that mathematics is universal. In spite of this, most people continue to view it as either mundane (balancing a checkbook) or mysterious (cryptography). This fifth volume of the What's Happening series contradicts that view by showing that mathematics is indeed found everywhere--in science, art, history, and our everyday lives.

Here is some of what you'll find in this volume:

Mathematics and Science
Mathematical biology: Mathematics was key to cracking the genetic code. Now, new mathematics is needed to understand the three-dimensional structure of the proteins produced from that code.
Celestial mechanics and cosmology: New methods have revealed a multitude of solutions to the three-body problem. And other new work may answer one of cosmology's most fundamental questions: What is the size and shape of the universe?
Mathematics and Everyday Life
Traffic jams: New models are helping researchers understand where traffic jams come from-and maybe what to do about them!
Small worlds: Researchers have found a short distance from theory to applications in the study of small world networks.
Elegance in Mathematics
Beyond Fermat's Last Theorem: Number theorists are reaching higher ground after Wiles' astounding 1994 proof: new developments in the elegant world of elliptic curves and modular functions.
The Millennium Prize Problems: The Clay Mathematics Institute has offered a million dollars for solutions to seven important and difficult unsolved problems.
These are just some of the topics of current interest that are covered in this latest volume of What's Happening in the Mathematical Sciences. The book has broad appeal for a wide spectrum of mathematicians and scientists, from high school students through advanced-level graduates and researchers.

Contents

Introduction
New heights for number theory
Nothing to sphere but sphere itself
A mathematical twist to protein folding
Finite math
The mathematics of traffic jams
Rewriting history
It's a small, big, small, big world
A celestial Pas de Trois
Think and grow rich
Ising on the cake

Details:

Publisher: American Mathematical Society
Distributor: American Mathematical Society
Series: What's Happening in the Mathematical Sciences, Volume: 5
Publication Year: 2002
ISBN: 0-8218-2904-1
Paging: 95 pp.
Binding: Softcover