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Radiation Protection Guidance for Diagnostic X Rays
  • Language: en
  • Pages: 48

Radiation Protection Guidance for Diagnostic X Rays

  • Type: Book
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  • Published: 1976
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  • Publisher: Unknown

None

The Rotarian
  • Language: en
  • Pages: 64

The Rotarian

  • Type: Magazine
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  • Published: 1951-07
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  • Publisher: Unknown

Established in 1911, The Rotarian is the official magazine of Rotary International and is circulated worldwide. Each issue contains feature articles, columns, and departments about, or of interest to, Rotarians. Seventeen Nobel Prize winners and 19 Pulitzer Prize winners – from Mahatma Ghandi to Kurt Vonnegut Jr. – have written for the magazine.

A New Construction of Homogeneous Quaternionic Manifolds and Related Geometric Structures
  • Language: en
  • Pages: 79

A New Construction of Homogeneous Quaternionic Manifolds and Related Geometric Structures

Let $V = {\mathbb R}^{p,q}$ be the pseudo-Euclidean vector space of signature $(p,q)$, $p\ge 3$ and $W$ a module over the even Clifford algebra $C\! \ell^0 (V)$. A homogeneous quaternionic manifold $(M,Q)$ is constructed for any $\mathfrak{spin}(V)$-equivariant linear map $\Pi : \wedge^2 W \rightarrow V$. If the skew symmetric vector valued bilinear form $\Pi$ is nondegenerate then $(M,Q)$ is endowed with a canonical pseudo-Riemannian metric $g$ such that $(M,Q,g)$ is a homogeneous quaternionic pseudo-Kahler manifold. If the metric $g$ is positive definite, i.e. a Riemannian metric, then the quaternionic Kahler manifold $(M,Q,g)$ is shown to admit a simply transitive solvable group of automo...

The $AB$ Program in Geometric Analysis: Sharp Sobolev Inequalities and Related Problems
  • Language: en
  • Pages: 113

The $AB$ Program in Geometric Analysis: Sharp Sobolev Inequalities and Related Problems

Function theory and Sobolev inequalities have been the target of investigation for many years. Sharp constants in these inequalities constitute a critical tool in geometric analysis. The $AB$ programme is concerned with sharp Sobolev inequalities on compact Riemannian manifolds. This text summarizes the results of contemporary research and gives an up-to-date report on the field.

Differential Equations Methods for the Monge-Kantorovich Mass Transfer Problem
  • Language: en
  • Pages: 81

Differential Equations Methods for the Monge-Kantorovich Mass Transfer Problem

In this volume, the authors demonstrate under some assumptions on $f $, $f $ that a solution to the classical Monge-Kantorovich problem of optimally rearranging the measure $\mu{ }=f dx$ onto $\mu =f dy$ can be constructed by studying the $p$-Laplacian equation $- \roman{div}(\vert DU_p\vert p-2}Du_p)=f -f $ in the limit as $p\rightarrow\infty$. The idea is to show $u_p\rightarrow u$, where $u$ satisfies $\vert Du\vert\leq 1, -\roman{div}(aDu)=f -f $ for some density $a\geq0$, and then to build a flow by solving a nonautonomous ODE involving $a, Du, f $ and $f $

The Moduli Space of $N=1$ Superspheres with Tubes and the Sewing Operation
  • Language: en
  • Pages: 150

The Moduli Space of $N=1$ Superspheres with Tubes and the Sewing Operation

Within the framework of complex supergeometry and motivated by two-dimensional genus-zero holomorphic $N = 1$ superconformal field theory, this book defines the moduli space of $N=1$ genus-zero super-Riemann surfaces with oriented and ordered half-infinite tubes, modulo superconformal equivalence.

Structurally Stable Quadratic Vector Fields
  • Language: en
  • Pages: 122

Structurally Stable Quadratic Vector Fields

This book solves a problem that has been open for over 20 years--the complete classification of structurally stable quadratic vector fields modulo limit cycles. The authors give all possible phase portraits for such structurally stable quadratic vector fields. No index. Annotation copyrighted by Book News, Inc., Portland, OR

Existence and Persistence of Invariant Manifolds for Semiflows in Banach Space
  • Language: en
  • Pages: 145

Existence and Persistence of Invariant Manifolds for Semiflows in Banach Space

Extends the theory for normally hyperbolic invariant manifolds to infinite dimensional dynamical systems in a Banach space, thereby providing tools for the study of PDE's and other infinite dimensional equations of evolution. In the process, the authors establish the existence of center-unstable and center-stable manifolds in a neighborhood of the unperturbed compact manifold. No index. Annotation copyrighted by Book News, Inc., Portland, OR

Non-Additive Exact Functors and Tensor Induction for Mackey Functors
  • Language: en
  • Pages: 89

Non-Additive Exact Functors and Tensor Induction for Mackey Functors

First the author introduces a generalization of the notion of (right)-exact functor between abelian categories to the case of non-additive functors. The main result of this section is an extension theorem: any functor defined on a suitable subcategory can be extended uniquely to a right exact functor defined on the whole category. Next those results are used to define various functors of generalized tensor induction, associated to finite bisets, between categories attached to finite groups. This includes a definition of tensor induction for Mackey functors, for cohomological Mackey functors, for p-permutation modules and algebras. This also gives a single formalism of bisets for restriction, inflation, and ordinary tensor induction for modules.

Periodic Hamiltonian Flows on Four Dimensional Manifolds
  • Language: en
  • Pages: 87

Periodic Hamiltonian Flows on Four Dimensional Manifolds

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