An Arithmetic Riemann-Roch Theorem for Singular Arithmetic Surfaces

An Arithmetic Riemann-Roch Theorem for Singular Arithmetic Surfaces
Author: Wayne Aitken
Publisher: American Mathematical Soc.
Total Pages: 189
Release: 1996
Genre: Mathematics
ISBN: 0821804073

The following gives a development of Arakelov theory general enough to handle not only regular arithmetic surfaces but also a large class of arithmetic surfaces whose generic fiber has singularities. This development culminates in an arithmetic Riemann-Roch theorem for such arithmetic surfaces. The first part of the memoir gives a treatment of Deligne's functorial intersection theory, and the second develops a class of intersection functions for singular curves which behaves analogously to the canonical Green's functions introduced by Arakelov for smooth curves.

Lectures on the Arithmetic Riemann-Roch Theorem. (AM-127), Volume 127

Lectures on the Arithmetic Riemann-Roch Theorem. (AM-127), Volume 127
Author: Gerd Faltings
Publisher: Princeton University Press
Total Pages: 118
Release: 2016-03-02
Genre: Mathematics
ISBN: 1400882478

The arithmetic Riemann-Roch Theorem has been shown recently by Bismut-Gillet-Soul. The proof mixes algebra, arithmetic, and analysis. The purpose of this book is to give a concise introduction to the necessary techniques, and to present a simplified and extended version of the proof. It should enable mathematicians with a background in arithmetic algebraic geometry to understand some basic techniques in the rapidly evolving field of Arakelov-theory.

Integrable Systems and Riemann Surfaces of Infinite Genus

Integrable Systems and Riemann Surfaces of Infinite Genus
Author: Martin Ulrich Schmidt
Publisher: American Mathematical Soc.
Total Pages: 127
Release: 1996
Genre: Mathematics
ISBN: 082180460X

This memoir develops the spectral theory of the Lax operators of nonlinear Schrödinger-like partial differential equations with periodic boundary conditions. Their special curves, i.e., the common spectrum with the periodic shifts, are generically Riemann surfaces of infinite genus. The points corresponding to infinite energy are added. The resulting spaces are no longer Riemann surfaces in the usual sense, but they are quite similar to compact Riemann surfaces.

Algebraic Curves and Riemann Surfaces

Algebraic Curves and Riemann Surfaces
Author: Rick Miranda
Publisher: American Mathematical Soc.
Total Pages: 414
Release: 1995
Genre: Mathematics
ISBN: 0821802682

In this book, Miranda takes the approach that algebraic curves are best encountered for the first time over the complex numbers, where the reader's classical intuition about surfaces, integration, and other concepts can be brought into play. Therefore, many examples of algebraic curves are presented in the first chapters. In this way, the book begins as a primer on Riemann surfaces, with complex charts and meromorphic functions taking centre stage. But the main examples come fromprojective curves, and slowly but surely the text moves toward the algebraic category. Proofs of the Riemann-Roch and Serre Dualtiy Theorems are presented in an algebraic manner, via an adaptation of the adelic proof, expressed completely in terms of solving a Mittag-Leffler problem. Sheaves andcohomology are introduced as a unifying device in the later chapters, so that their utility and naturalness are immediately obvious. Requiring a background of one term of complex variable theory and a year of abstract algebra, this is an excellent graduate textbook for a second-term course in complex variables or a year-long course in algebraic geometry.

Gauge Theory on Compact Surfaces

Gauge Theory on Compact Surfaces
Author: Ambar Sengupta
Publisher: American Mathematical Soc.
Total Pages: 98
Release: 1997
Genre: Mathematics
ISBN: 0821804847

In this paper we develop a concrete description of connections on principal bundles, possibly non-trivial, over compact surfaces and use this description to construct the Yang-Mills measure which underlies the Euclidean quantum theory of gauge fields, involving compact gauge groups, on compact connected two-dimensional Riemannian manifolds (possibly with boundary). Using this measure we compute expectation values of important random variables, the Wilson loops variables, corresponding to a broad class of configurations of loops on the surface.

Axiomatic Stable Homotopy Theory

Axiomatic Stable Homotopy Theory
Author: Mark Hovey
Publisher: American Mathematical Soc.
Total Pages: 130
Release: 1997
Genre: Mathematics
ISBN: 0821806246

We define and investigate a class of categories with formal properties similar to those of the homotopy category of spectra. This class includes suitable versions of the derived category of modules over a commutative ring, or of comodules over a commutative Hopf algebra, and is closed under Bousfield localization. We study various notions of smallness, questions about representability of (co)homology functors, and various kinds of localization. We prove theorems analogous to those of Hopkins and Smith about detection of nilpotence and classification of thick subcategories. We define the class of Noetherian stable homotopy categories, and investigate their special properties. Finally, we prove that a number of categories occurring in nature (including those mentioned above) satisfy our axioms.

Generalized Minkowski Content, Spectrum of Fractal Drums, Fractal Strings and the Riemann Zeta-Functions

Generalized Minkowski Content, Spectrum of Fractal Drums, Fractal Strings and the Riemann Zeta-Functions
Author: Christina Q. He
Publisher: American Mathematical Soc.
Total Pages: 114
Release: 1997
Genre: Mathematics
ISBN: 0821805975

This memoir provides a detailed study of the effect of non power-like irregularities of (the geometry of) the fractal boundary on the spectrum of "fractal drums" (and especially of "fractal strings"). In this work, the authors extend previous results in this area by using the notionof generalized Minkowski content which is defined through some suitable "gauge functions" other than power functions. (This content is used to measure the irregularity (or "fractality") of the boundary of an open set in R]n by evaluating the volume of its small tubular neighborhoods). In the situation when the power function is not the natural "gauge function", this enables the authors to obtain more precise estimates, with a broader potential range of applications than in previous papers of the second author and his collaborators. This text will also be of interest to those working in mathematical physics.

Model Theory and Linear Extreme Points in the Numerical Radius Unit Ball

Model Theory and Linear Extreme Points in the Numerical Radius Unit Ball
Author: Michael A. Dritschel
Publisher: American Mathematical Soc.
Total Pages: 77
Release: 1997
Genre: Mathematics
ISBN: 0821806513

This memoir initiates a model theory-based study of the numerical radius norm. Guided by the abstract model theory of Jim Agler, the authors propose a decomposition for operators that is particularly useful in understanding their properties with respect to the numerical radius norm. Of the topics amenable to investigation with these tools, the following are presented: a complete description of the linear extreme points of the non-matrix (numerical radius) unit ball; several equivalent characterizations of matricial extremals in the unit ball, that is, those members which do not allow a nontrivial extension remaining in the unit ball; and applications to numerical ranges of matrices, including a complete parameterization of all matrices whose numerical ranges are closed disks.

Geometry of Loop Spaces and the Cobar Construction

Geometry of Loop Spaces and the Cobar Construction
Author: Hans J. Baues
Publisher: American Mathematical Soc.
Total Pages: 194
Release: 1980
Genre: Mathematics
ISBN: 0821822306

The homology of iterated loop spaces [capital Greek]Omega [superscript]n [italic]X has always been a problem of major interest because it gives some insight into the homotopy of [italic]X, among other things. Therefore, if [italic]X is a CW-complex, one has been interested in small CW models for [capital Greek]Omega [superscript]n [italic]X in order to compute the cellular chain complex. The author proves a very general model theorem from which he can derive models, in addition to very technical proofs of the model theorem for several other models.

Crossed Products with Continuous Trace

Crossed Products with Continuous Trace
Author: Siegfried Echterhoff
Publisher: American Mathematical Soc.
Total Pages: 149
Release: 1996
Genre: Mathematics
ISBN: 0821805630

This memoir presents an extensive study of strongly continuous actions of abelian locally compact groups on [italic capital]C*-algebras with continuous trace. Expositions of the Mackey-Green-Rieffel machine of induced representations and the theory of Morita equivalent [italic capital]C*-dynamical systems are included. There is also an elaboration of the representation theory of crossed products by actions of abelian groups on type I [italic capital]C*-algebras.