Higher Initial Ideals of Homogeneous Ideals

Higher Initial Ideals of Homogeneous Ideals PDF Author: Gunnar Fløystad
Publisher: American Mathematical Soc.
ISBN: 0821808532
Category : Mathematics
Languages : en
Pages : 82

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Book Description
Given a homogeneous ideal I and a monomial order, the initials ideal in (I) can be formed. The initial idea gives information about I, but quite a lot of information is also lost. The author remedies this by defining a series of higher initial ideals of a homogenous ideal, and considers the case when I is the homogenous ideal of a curve in P3 and the monomial order is reverse lexicographic. No index. Annotation copyrighted by Book News, Inc., Portland, OR

Higher Initial Ideals of Homogeneous Ideals

Higher Initial Ideals of Homogeneous Ideals PDF Author: Gunnar Fløystad
Publisher: American Mathematical Soc.
ISBN: 0821808532
Category : Mathematics
Languages : en
Pages : 82

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Book Description
Given a homogeneous ideal I and a monomial order, the initials ideal in (I) can be formed. The initial idea gives information about I, but quite a lot of information is also lost. The author remedies this by defining a series of higher initial ideals of a homogenous ideal, and considers the case when I is the homogenous ideal of a curve in P3 and the monomial order is reverse lexicographic. No index. Annotation copyrighted by Book News, Inc., Portland, OR

Integral Closure of Ideals, Rings, and Modules

Integral Closure of Ideals, Rings, and Modules PDF Author: Craig Huneke
Publisher: Cambridge University Press
ISBN: 0521688604
Category : Mathematics
Languages : en
Pages : 446

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Book Description
Ideal for graduate students and researchers, this book presents a unified treatment of the central notions of integral closure.

Almost Automorphic and Almost Periodic Dynamics in Skew-Product Semiflows

Almost Automorphic and Almost Periodic Dynamics in Skew-Product Semiflows PDF Author: Wenxian Shen
Publisher: American Mathematical Soc.
ISBN: 0821808672
Category : Mathematics
Languages : en
Pages : 111

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Book Description
This volume is devoted to the study of almost automorphic dynamics in differential equations. By making use of techniques from abstract topological dynamics, it is shown that almost automorphy, a notion which was introduced by S. Bochner in 1955, is essential and fundamental in the qualitative study of almost periodic differential equations.

Periodic Hamiltonian Flows on Four Dimensional Manifolds

Periodic Hamiltonian Flows on Four Dimensional Manifolds PDF Author: Yael Karshon
Publisher: American Mathematical Soc.
ISBN: 0821811819
Category : Mathematics
Languages : en
Pages : 87

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Book Description
This book is intended for graduate students and research mathematicians interested in global analysis, analysis on manifolds, and symplectic geometry.

Spectral Asymptotics on Degenerating Hyperbolic 3-Manifolds

Spectral Asymptotics on Degenerating Hyperbolic 3-Manifolds PDF Author: Józef Dodziuk
Publisher: American Mathematical Soc.
ISBN: 0821808370
Category : Mathematics
Languages : en
Pages : 90

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Book Description
In this volume, the authors study asymptotics of the geometry and spectral theory of degenerating sequences of finite volume hyperbolic manifolds of three dimensions. Thurston's hyperbolic surgery theorem assets the existence of non-trivial sequences of finite volume hyperbolic three manifolds which converge to a three manifold with additional cusps. In the geometric aspect of their study, the authors use the convergence of hyperbolic metrics on the thick parts of the manifolds under consideration to investigate convergentce of tubes in the manifolds of the sequence to cusps of the limiting manifold. In the specral theory aspect of the work, they prove convergence of heat kernels. They then define a regualrized heat race associated to any finite volume, complete, hyperbolic three manifold, and study its asymptotic behaviour through degeneration. As an application of the analysis of the regularized heat trace, they study asymptotic behaviours of the spectral zeta function, determinant of the Laplacian, Selberg zeta function, and spectral counting functions through degeneration. The authors' methods are an adaptation to three dimensions of the earlier work of Jorgenson and Lundelius who investigated the asymptotic behaviour of spectral functions on degenerating families of finite area hyperbolic Riemann surfaces.

Bosonic Construction of Vertex Operator Para-Algebras from Symplectic Affine Kac-Moody Algebras

Bosonic Construction of Vertex Operator Para-Algebras from Symplectic Affine Kac-Moody Algebras PDF Author: Michael David Weiner
Publisher: American Mathematical Soc.
ISBN: 0821808664
Category : Mathematics
Languages : en
Pages : 121

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Book Description
Begins with the bosonic construction of four level -1/2 irreducible representations of the symplectic affine Kac-Moody Lie algebra Cl. The direct sum of two of these is given the structure of a vertex operator algebra (VOA), and the direct sum of the other two is given the structure of a twisted VOA-module. The dissertation includes the bosonic analog of the fermionic construction of a vertex operator superalgebra from the four level 1 irreducible modules of type Dl. No index. Annotation copyrighted by Book News, Inc., Portland, OR

Basic Almost-Poised Hypergeometric Series

Basic Almost-Poised Hypergeometric Series PDF Author: Wenchang Chu
Publisher: American Mathematical Soc.
ISBN: 9780821808115
Category : Mathematics
Languages : en
Pages : 116

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Book Description
Presents a systematic treatment for the evaluation of basic almost poised series. Some 200 identities are covered, among which most are believed to be new. Their connections with the q-Clausen formulae as well as Rogers-Ramanujan identities are sketched. No index. Annotation copyrighted by Book News, Inc., Portland, OR

Uniform Rectifiability and Quasiminimizing Sets of Arbitrary Codimension

Uniform Rectifiability and Quasiminimizing Sets of Arbitrary Codimension PDF Author: Guy David
Publisher: American Mathematical Soc.
ISBN: 0821820486
Category : Mathematics
Languages : en
Pages : 146

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Book Description
This book is intended for graduate students and research mathematicians interested in calculus of variations and optimal control; optimization.

Algebraic and Strong Splittings of Extensions of Banach Algebras

Algebraic and Strong Splittings of Extensions of Banach Algebras PDF Author: William G. Bade
Publisher: American Mathematical Soc.
ISBN: 0821810588
Category : Mathematics
Languages : en
Pages : 129

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Book Description
In this volume, the authors address the following: Let $A$ be a Banach algebra, and let $\sum\:\ 0\rightarrow I\rightarrow\frak A\overset\pi\to\longrightarrow A\rightarrow 0$ be an extension of $A$, where $\frak A$ is a Banach algebra and $I$ is a closed ideal in $\frak A$. The extension splits algebraically (respectively, splits strongly) if there is a homomorphism (respectively, continuous homomorphism) $\theta\: A\rightarrow\frak A$ such that $\pi\circ\theta$ is the identity on $A$. Consider first for which Banach algebras $A$ it is true that every extension of $A$ in a particular class of extensions splits, either algebraically or strongly, and second for which Banach algebras it is true that every extension of $A$ in a particular class which splits algebraically also splits strongly. These questions are closely related to the question when the algebra $\frak A$ has a (strong) Wedderburn decomposition. The main technique for resolving these questions involves the Banach cohomology group $\cal H2(A,E)$ for a Banach $A$-bimodule $E$, and related cohomology groups. Later chapters are particularly concerned with the case where the ideal $I$ is finite-dimensional. Results are obtained for many of the standard Banach algebras $A$.

Invariants under Tori of Rings of Differential Operators and Related Topics

Invariants under Tori of Rings of Differential Operators and Related Topics PDF Author: Ian Malcolm Musson
Publisher: American Mathematical Soc.
ISBN: 0821808850
Category : Mathematics
Languages : en
Pages : 99

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Book Description
If $G$ is a reductive algebraic group acting rationally on a smooth affine variety $X$, then it is generally believed that $D(X) $ has properties very similar to those of enveloping algebras of semisimple Lie algebras. In this book, the authors show that this is indeed the case when $G$ is a torus and $X=k \times (k ) $. They give a precise description of the primitive ideals in $D(X) $ and study in detail the ring theoretical and homological properties of the minimal primitive quotients of $D(X) $. The latter are of the form $B =D(X) /({\germ g}-\chi({\germ g}))$ where ${\germ g}= {\rm Lie}(G)$, $\chi\in {\germ g} ast$ and ${\germ g}-\chi({\germ g})$ is the set of all $v-\chi(v)$ with $v\in {\germ g}$. They occur as rings of twisted differential operators on toric varieties. It is also proven that if $G$ is a torus acting rationally on a smooth affine variety, then $D(X/\!/G)$ is a simple ring.