WorldCat Identities

Powers, David L.

Overview
Works: 28 works in 130 publications in 2 languages and 3,995 library holdings
Genres: Textbooks 
Roles: Author, Other
Classifications: QA379, 515.353
Publication Timeline
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Most widely held works by David L Powers
Boundary value problems by David L Powers( Book )

80 editions published between 1972 and 2014 in 3 languages and held by 1,351 WorldCat member libraries worldwide

"Boundary Value Problems is the leading text on boundary value problems and Fourier series for professionals and students in engineering, science, and mathematics who work with partial differential equations. In this update classic, author David Powers provides a thorough overview of solving boundary value problems involving partial differential equations by separation of variables. Additional techniques used include Laplace transform and numerical methods. This edition offers a thorough treatment of one dimensional models before introducing more complicated problems."--Jacket
Zero-symmetric graphs : trivalent graphical regular representations of groups by H. S. M Coxeter( Book )

13 editions published in 1981 in English and Undetermined and held by 304 WorldCat member libraries worldwide

Elementary differential equations with boundary value problems by David L Powers( Book )

10 editions published between 1985 and 1987 in English and Undetermined and held by 199 WorldCat member libraries worldwide

Highway investment analysis package volume II, technical manual by Richard D Juster( Book )

1 edition published in 1981 in English and held by 5 WorldCat member libraries worldwide

Highway investment analysis package volume III, computer user's guide by Richard D Juster( Book )

1 edition published in 1981 in English and held by 5 WorldCat member libraries worldwide

Instructor's manual for boundary value problems by David L Powers( Book )

2 editions published in 1979 in English and held by 4 WorldCat member libraries worldwide

Boundary value problems by David L Powers( )

1 edition published in 1972 in English and held by 2 WorldCat member libraries worldwide

Student's partial solutions manual to accompany Elementary differential equations by David L Powers( Book )

1 edition published in 1987 in English and held by 2 WorldCat member libraries worldwide

SHOE: the extraction of hierarchical structure for machine learning of natural language by David L Powers( Book )

1 edition published in 1991 in English and held by 2 WorldCat member libraries worldwide

Simulation of traffic in emergency evacuations by John C Cosby( Book )

1 edition published in 1982 in English and held by 1 WorldCat member library worldwide

Instructor's manual for Boundary value problems, second edition by David L Powers( Book )

1 edition published in 1979 in English and held by 1 WorldCat member library worldwide

A Surprising Property of Some Regular Polytopes( Book )

1 edition published in 1986 in English and held by 1 WorldCat member library worldwide

The Platonic solids and some other polytopes have the property that the adjacency information contained in the skeleton (graph) is enough to determine the polytope completely. In particular, the eigenmatrix of the adjacency matrix corresponding to the second eigenvalue provides the coordinates of the vertices. (Author)
TOEFL 2000 writing framework : a working paper( Book )

1 edition published in 2000 in English and held by 1 WorldCat member library worldwide

Pivoted plane pad bearings : a variational solution by A. Z Szeri( Book )

1 edition published in 1969 in English and held by 1 WorldCat member library worldwide

Eigenvectors of Graphs( Book )

2 editions published between 1986 and 1988 in English and held by 1 WorldCat member library worldwide

Let z be an eigenvector of the adjacency matrix A of a connected graph G. Say a vertix is positive, nonnegative, zero, etc. if the same is true of the corresponding element of z. If z is an eigenvector for the second largest eigenvalue of A, it is known that the nonnegative vertices of G form a connected subgraph. This separation of vertices according to sign provides the basis for studying the structure of G as revealed by its eigenvectors, inequalities on the number of edges joining positive and negative vertices, bounds on the number of zero vertices, bounds on multiplicities and some description of the variability of the elements of z. The rows of an eigenmatrix provide a mapping of the vertices of G into m-dimensional euclidean space. Some graphs thus 'draw themselves'. This phenomenon is especially interesting if the graph is the skeleton of a polytope
Graph Partitioning by Eigenvectors( Book )

1 edition published in 1987 in English and held by 1 WorldCat member library worldwide

Let A be the adjacency matrix of a connected graph G. If z is a column vector, we say that a vertex of G is positive, nonnegative, null, etc. if the corresponding entry of z has that property. For z such that Az> or = alpha z, we bound the number of components in the subgraph induced by positive vertices. For eigenvectors z having a null element, we bound the number of components in the graph induced by non-null vertices. Finally, bounds are established for the number of null elements in an eigenvector, for the multiplicity of an eigenvalue and for the magnitudes of the second and last eignevalues of a general or a bipartite graph
Instructors manual for [D[D[D[D[D[D[D[D[D[D[D[D[D's manual for boundary value problems by David L Powers( Book )

1 edition published in 1979 in English and held by 1 WorldCat member library worldwide

Eigenvectors of Distance-Regular Graphs( Book )

1 edition published in 1987 in English and held by 1 WorldCat member library worldwide

The objective of this work is to find properties of a distance-regular graph G that are expressed in the eigenvectors of its adjacency matrix. The approach is to consider the rows of a matrix of orthogonal eigencolumns as (coordinates of) points in euclidean space, each one corresponding to a vertex of G. For the second eigenvalue, the symmetry group of the points is isomorphic to the automorphism group of G. Adjacency of vertices is related to linear dependence, linear independence and proximity of points. Relative position of points studied by way of the polytope that is their convex hull. Several families of examples are included
Student's solutions manual, to accompany Boundary value problems, sixth edition by David L Powers( )

1 edition published in 2010 in English and held by 0 WorldCat member libraries worldwide

Student Solutions Manual, Boundary Value Problems and Partial Differential Equations by David L Powers( )

1 edition published in 2009 in English and held by 0 WorldCat member libraries worldwide

Student Solutions Manual, Boundary Value Problems
 
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Audience level: 0.30 (from 0.18 for Boundary v ... to 1.00 for Graph Part ...)

Boundary value problems
Alternative Names
Powers, D.

Powers, D. (David L.)

Powers, David Leusch

Languages
English (114)

Spanish (1)

Covers