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Characters and Cyclotomic Fields in Finite Geometry

Characters and Cyclotomic Fields in Finite Geometry
Author: Bernhard Schmidt
Publisher: Springer
Total Pages: 112
Release: 2004-10-13
Genre: Mathematics
ISBN: 3540457976

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This monograph contributes to the existence theory of difference sets, cyclic irreducible codes and similar objects. The new method of field descent for cyclotomic integers of presribed absolute value is developed. Applications include the first substantial progress towards the Circulant Hadamard Matrix Conjecture and Ryser`s conjecture since decades. It is shown that there is no Barker sequence of length l with 13


Finite Geometry and Character Theory

Finite Geometry and Character Theory
Author: Alexander Pott
Publisher: Springer
Total Pages: 185
Release: 2006-11-14
Genre: Mathematics
ISBN: 3540491821

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Difference sets are of central interest in finite geometry and design theory. One of the main techniques to investigate abelian difference sets is a discrete version of the classical Fourier transform (i.e., character theory) in connection with algebraic number theory. This approach is described using only basic knowledge of algebra and algebraic number theory. It contains not only most of our present knowledge about abelian difference sets, but also gives applications of character theory to projective planes with quasiregular collineation groups. Therefore, the book is of interest both to geometers and mathematicians working on difference sets. Moreover, the Fourier transform is important in more applied branches of discrete mathematics such as coding theory and shift register sequences.


Finite Geometry and Combinatorial Applications

Finite Geometry and Combinatorial Applications
Author: Simeon Ball
Publisher: Cambridge University Press
Total Pages: 299
Release: 2015-07-02
Genre: Mathematics
ISBN: 1107107997

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A graduate-level introduction to finite geometry and its applications to other areas of combinatorics.


Zeta Functions of Groups and Rings

Zeta Functions of Groups and Rings
Author: Marcus du Sautoy
Publisher: Springer Science & Business Media
Total Pages: 217
Release: 2008
Genre: Mathematics
ISBN: 354074701X

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Zeta functions have been a powerful tool in mathematics over the last two centuries. This book considers a new class of non-commutative zeta functions which encode the structure of the subgroup lattice in infinite groups. The book explores the analytic behaviour of these functions together with an investigation of functional equations. Many important examples of zeta functions are calculated and recorded providing an important data base of explicit examples and methods for calculation.


Axiom of Choice

Axiom of Choice
Author: Horst Herrlich
Publisher: Springer
Total Pages: 207
Release: 2006-07-21
Genre: Mathematics
ISBN: 3540342680

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AC, the axiom of choice, because of its non-constructive character, is the most controversial mathematical axiom. It is shunned by some, used indiscriminately by others. This treatise shows paradigmatically that disasters happen without AC and they happen with AC. Illuminating examples are drawn from diverse areas of mathematics, particularly from general topology, but also from algebra, order theory, elementary analysis, measure theory, game theory, and graph theory.


Combinatorial Stochastic Processes

Combinatorial Stochastic Processes
Author: Jim Pitman
Publisher: Springer Science & Business Media
Total Pages: 257
Release: 2006-05-11
Genre: Mathematics
ISBN: 354030990X

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The purpose of this text is to bring graduate students specializing in probability theory to current research topics at the interface of combinatorics and stochastic processes. There is particular focus on the theory of random combinatorial structures such as partitions, permutations, trees, forests, and mappings, and connections between the asymptotic theory of enumeration of such structures and the theory of stochastic processes like Brownian motion and Poisson processes.


Gröbner Bases and the Computation of Group Cohomology

Gröbner Bases and the Computation of Group Cohomology
Author: David J. Green
Publisher: Springer Science & Business Media
Total Pages: 156
Release: 2003-11-18
Genre: Mathematics
ISBN: 9783540203391

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This monograph develops the Gröbner basis methods needed to perform efficient state of the art calculations in the cohomology of finite groups. Results obtained include the first counterexample to the conjecture that the ideal of essential classes squares to zero. The context is J. F. Carlson’s minimal resolutions approach to cohomology computations.


C^\infinity - Differentiable Spaces

C^\infinity - Differentiable Spaces
Author: Juan A. Navarro González
Publisher: Springer Science & Business Media
Total Pages: 212
Release: 2003-10-29
Genre: Mathematics
ISBN: 9783540200727

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The volume develops the foundations of differential geometry so as to include finite-dimensional spaces with singularities and nilpotent functions, at the same level as is standard in the elementary theory of schemes and analytic spaces. The theory of differentiable spaces is developed to the point of providing a handy tool including arbitrary base changes (hence fibred products, intersections and fibres of morphisms), infinitesimal neighbourhoods, sheaves of relative differentials, quotients by actions of compact Lie groups and a theory of sheaves of Fréchet modules paralleling the useful theory of quasi-coherent sheaves on schemes. These notes fit naturally in the theory of C^\infinity-rings and C^\infinity-schemes, as well as in the framework of Spallek’s C^\infinity-standard differentiable spaces, and they require a certain familiarity with commutative algebra, sheaf theory, rings of differentiable functions and Fréchet spaces.


Arithmetic of Finite Fields

Arithmetic of Finite Fields
Author: Ferruh Özbudak
Publisher: Springer
Total Pages: 257
Release: 2012-07-02
Genre: Computers
ISBN: 364231662X

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This book constitutes the refereed proceedings of the 4th International Workshop on the Arithmetic of Finite Field, WAIFI 2012, held in Bochum, Germany, in July 2012. The 13 revised full papers and 4 invited talks presented were carefully reviewed and selected from 29 submissions. The papers are organized in topical sections on coding theory and code-based cryptography, Boolean functions, finite field arithmetic, equations and functions, and polynomial factorization and permutation polynomial.


Representation Theory and Complex Analysis

Representation Theory and Complex Analysis
Author: Michael Cowling
Publisher: Springer Science & Business Media
Total Pages: 400
Release: 2008-02-27
Genre: Mathematics
ISBN: 3540768912

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Six leading experts lecture on a wide spectrum of recent results on the subject of the title. They present a survey of various interactions between representation theory and harmonic analysis on semisimple groups and symmetric spaces, and recall the concept of amenability. They further illustrate how representation theory is related to quantum computing; and much more. Taken together, this volume provides both a solid reference and deep insights on current research activity.