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Articles 1 - 30 of 146
Full-Text Articles in Physical Sciences and Mathematics
Model And Design-Based Analysis Of Complex Surveys., Joydip Mitra Dr.
Model And Design-Based Analysis Of Complex Surveys., Joydip Mitra Dr.
Doctoral Theses
We consider estimating the total Y of a variable y defined on a survey population. The survey is complex only in the sense that we admit sample selection with arbitrary probabilities. Our 'analysis' consists in examining efficacies of conf Idence intervals for the For this we need point estimators and or mean square error (MSE) variance { estimators, respectively say, total. the corresponding e and v. The distribution, resulting from repeated sampling, of the pivotal quantity d = (e-Y)/V 1s supposed to approximate that of standard normal deviate t or of Students t with (n-1) degrees of freedom, assuming large …
Computer Simplification Of Engineering Systems Formulas, J. W. Helton, Mark Stankus, John Wavrik
Computer Simplification Of Engineering Systems Formulas, J. W. Helton, Mark Stankus, John Wavrik
Mathematics
Currently, the three most popular commercial computer algebra systems are Mathematica, Maple, and MACSYMA (the 3 M’s). These systems provide a wide variety of symbolic computation facilities for commutative algebra and contain implementations of powerful algorithms in that domain. The Gröbner Basis Algorithm, for example, is an important tool used in computation with commutative algebras and in solving systems of polynomial equations.
On the other hand, most of the computation involved in linear control theory is performed on matrices and these do not commute. A typical issue of IEEE TAC is full of A B C D type linear systems …
Square Roots Of Finite Groups - Ii, Matthew Devos, David Mcadams, Rebecca Rapoport
Square Roots Of Finite Groups - Ii, Matthew Devos, David Mcadams, Rebecca Rapoport
Mathematical Sciences Technical Reports (MSTR)
A subset R of a finite group G is a square root of G if R2 = G. If R is a square root of G for which |R|2 = G, then R is referred to as a perfect square root of G. It can be shown using character theory that perfect square roots do not exist. The purpose of this paper is to work toward an elementary proof of this result.
Topologies Invariant Under A Group Action, Paul Bankston
Topologies Invariant Under A Group Action, Paul Bankston
Mathematics, Statistics and Computer Science Faculty Research and Publications
We study links between faithful group actions on a set and topologies on that set. In one direction, a group action has its invariant topologies (so we may regard members of the action to be homeomorphisms relative to those topologies); in the other direction, a topology has its preserving group actions (i.e., the subgroups of the homeomorphism group of the topology). This two-way passage allows us to discuss topological features of group actions as well as symmetry features of topologies.
Review Of “Linear Programming And Related Problems” By E. Nering And A. W. Tucker, Stephen B. Maurer
Review Of “Linear Programming And Related Problems” By E. Nering And A. W. Tucker, Stephen B. Maurer
Mathematics & Statistics Faculty Works
No abstract provided.
Quasireversibility Methods For Non-Well-Posed Problems, Gordon W. Clark, Seth F. Oppenheimer
Quasireversibility Methods For Non-Well-Posed Problems, Gordon W. Clark, Seth F. Oppenheimer
Faculty and Research Publications
The nal value problem,
ae u t + Au = 0 ; 0 ! t ! T u(T ) = f
with positive self-adjoint unbounded A is known to be ill-posed. One approach to dealing with this has been the method of quasireversibility, where the operator is perturbed to obtain a well-posed problem which approximates the original problem. In this work, we will use a quasi-boundary-value method, where we perturb the nal condition to form an approximate non-local problem depending on a small parameter. We show that the approximate problems are well posed and that their solutions u converge on …
First Passage Processes In Queuing System Mx/Gr/1 With Service Delay Discipline, Lev M. Abolnikov, Jewgeni H. Dshalalow, Alexander M. Dukhovny
First Passage Processes In Queuing System Mx/Gr/1 With Service Delay Discipline, Lev M. Abolnikov, Jewgeni H. Dshalalow, Alexander M. Dukhovny
Mathematics and System Engineering Faculty Publications
This article deals with a general single-server bulk queueing system with a server waiting until the queue will reach level r before it starts processing customers. If at least r customers are available the server takes a batch of the fixed size r of units for service. The input stream is assumed to be a compound Poisson process modulated by a semi-Markov process and with a multilevel control of service time. The authors evaluate the steady state probabilities of the queueing processes with discrete and continuous time parameter preliminarily establishing necessary and sufficient conditions for the ergodicity of the processes. …
A Characterization Of Sigma-Symmetrically Porous Symmetrical Cantor Sets, M. Evans, P. Humke, Karen Saxe
A Characterization Of Sigma-Symmetrically Porous Symmetrical Cantor Sets, M. Evans, P. Humke, Karen Saxe
Karen Saxe
No abstract provided.
Multiple Solutions For A Nonlinear Dirichlet Problem, Alfonso Castro, Jorge Cossio
Multiple Solutions For A Nonlinear Dirichlet Problem, Alfonso Castro, Jorge Cossio
All HMC Faculty Publications and Research
The authors prove that a semilinear elliptic boundary value problem has five solutions when the range of the derivative of the nonlinearity includes at least the first two eigenvalues. Extensive use is made of Lyapunov-Schmidt reduction arguments, the mountain pass lemma, and characterizations of the local degree of critical points.
Multiple Solutions For A Semilinear Dirichlet Problem, Alfonso Castro, Jorge Cossio
Multiple Solutions For A Semilinear Dirichlet Problem, Alfonso Castro, Jorge Cossio
All HMC Faculty Publications and Research
The authors prove that a semilinear elliptic boundary value problem has five solutions when the range of the derivative of the nonlinearity includes at least the first two eigenvalues. Extensive use is made of Lyapunov–Schmidt reduction arguments, the mountain pass lemma, and characterizations of the local degree of critical points.
Lajos Takács And His Work, Jewgeni H. Dshalalow, Ryszard Syski
Lajos Takács And His Work, Jewgeni H. Dshalalow, Ryszard Syski
Mathematics and System Engineering Faculty Publications
This paper, written in honor of the 70th birthday of Lajos Takács, addresses his life and work, and includes some personal observations and appreciation of his contributions. In particular, it includes a short biography, an informal discussion of some of his major research areas (queueing, fluctuations, waiting time processes, and random rooted trees), and an account of the relationship of his work to that of Félix Pollaczek.
Studies On Design, Routing And Fault Tolerance Of Interconnection Network., Krishnendu Mukhopadhyay Dr.
Studies On Design, Routing And Fault Tolerance Of Interconnection Network., Krishnendu Mukhopadhyay Dr.
Doctoral Theses
A recent trend in computing is to distribute the computations among a set of processing elements. There are two basic appronches to this - one is to build a loosely-coupled system and the other is to form a tightly-coupled system [PS85].In a loosely-coupled system, the processors do not share common memory or a common clock; but sharing of important resources like data files, softwares, special hardware components etc., is possible without duplicating the resources themselves. The processing nodes may even be geographicully separated from each other and are connected through databuses, telephone/radio links, satellite, etc. Such loosely- coupled systems are …
Commutators As Powers In Free Products Of Groups, Leo Comerford, Charles C. Edmunds, Gerhard Rosenberger
Commutators As Powers In Free Products Of Groups, Leo Comerford, Charles C. Edmunds, Gerhard Rosenberger
Leo Comerford
The ways in which a nontrivial commutator can be a proper power in a free product of groups are identified
A Positive Answer To The Busemann-Petty Problem In 3 Dimensions, Richard J. Gardner
A Positive Answer To The Busemann-Petty Problem In 3 Dimensions, Richard J. Gardner
Mathematics Faculty Publications
We prove that in E3 the Busemann-Petty problem, concerning central sections of centrally symmetric convex bodies, has a positive answer. Together with other results, this settles the problem in each dimension.
Commutators As Powers In Free Products Of Groups, Leo Comerford, Charles C. Edmunds, Gerhard Rosenberger
Commutators As Powers In Free Products Of Groups, Leo Comerford, Charles C. Edmunds, Gerhard Rosenberger
Faculty Research and Creative Activity
The ways in which a nontrivial commutator can be a proper power in a free product of groups are identified
Commutators As Powers In Free Products Of Groups, Leo Comerford, Charles Edmunds, Gerhard Rosenberger
Commutators As Powers In Free Products Of Groups, Leo Comerford, Charles Edmunds, Gerhard Rosenberger
Faculty Research and Creative Activity
The ways in which a nontrivial commutator can be a proper power in a free product of groups are identified
Perturbations Of Certain Reflexive Algebras, David R. Pitts
Perturbations Of Certain Reflexive Algebras, David R. Pitts
Department of Mathematics: Faculty Publications
In this note we use cohomological techniques to prove that if there is a linear map between two CSL algebras which is close to the identity, then the two CSL algebras are similar. We use our result to show that if 2' is a purely atomic, hyperreflexive CSL with uniform infinite multiplicity which satisfies the 4-cycle interpolation condition, then there are constants d, C > 0 such that whenever L is another CSL such that d(Alg2' , AlgL) < d, then there is an invertible operator S such that S Alg2'S-1 = AlgL and IISII liS-III < 1 + Cd(AIg2' , AIgL).
Lattice-Ordered Algebras That Are Subdirect Products Of Valuation Domains, Melvin Henriksen, Suzanne Larson, Jorge Martinez, R. G. Woods
Lattice-Ordered Algebras That Are Subdirect Products Of Valuation Domains, Melvin Henriksen, Suzanne Larson, Jorge Martinez, R. G. Woods
All HMC Faculty Publications and Research
An f-ring (i.e., a lattice-ordered ring that is a subdirect product of totally ordered rings) A is called an SV-ring if A/P is a valuation domain for every prime ideal P of A. If M is a maximal ℓ-ideal of A , then the rank of A at M is the number of minimal prime ideals of A contained in M, rank of A is the sup of the ranks of A at each of its maximal ℓ-ideals. If the latter is a positive integer, then A is said to have finite rank, and if A …
Lattice-Ordered Algebras That Are Subdirect Products Of Valuation Domains, Melvin Henriksen, Suzanne Larson, Jorge Martinez, R. G. Woods
Lattice-Ordered Algebras That Are Subdirect Products Of Valuation Domains, Melvin Henriksen, Suzanne Larson, Jorge Martinez, R. G. Woods
Mathematics Faculty Works
An f-ring (i.e., a lattice-ordered ring that is a subdirect product pf totally ordered rings) A is called an SV-ring if AIP is a valuation domain for every prime ideal P of A. If M is a maximal e-ideal of A,then the rank of A at M is the number of minimal prime ideals of A contained in M, rank of A is the sup of the ranks of A at each of its maximal e-ideals. If the latter is a positive integer, then A is said to have finite rank, and if A = C(X) is the ring of …
On Lexical And Syntactic Processing Of Bangla Language By Computer., Probal Sengupta Dr.
On Lexical And Syntactic Processing Of Bangla Language By Computer., Probal Sengupta Dr.
Doctoral Theses
A distinctive intelligent trait of human beings is the ability to carry out meaningful communication through language. The communication may be direct as in spoken conversation or indirect as in written form, through the audio-visual media, etc. Linguistic ability in humans have fascinated scholars ever since man first learnt to use language. Linguistics, the branch of study involved in studying the nature of human linguistic communication, is perhaps as old as language itself. The invention of the computer added a new dimension to linguistics. Making the computer emu- late human linguistic behaviour was taken up as a challenge by computer …
An Algebraic Approach To Derivatives, Julia Lee Roman
An Algebraic Approach To Derivatives, Julia Lee Roman
Theses & Dissertations
The purpose of this thesis is to relate a unique method of dealing with the concept of the derivative of a function. The traditional approach to teaching calculus introduces the idea of the limit of a function early in the course as evidenced in the Essential Elements of the State Board of Education of Texas which places the limit concept as the second essential element of calculus in Texas high schools (Texas Education Agency (TEA) Essential Elements 1991). The "concepts and skills associated with the derivative" (TEA Essential Elements 1991) follow immediately after the introduction of the limit of a …
Partial Difference Sets In P-Groups, James A. Davis
Partial Difference Sets In P-Groups, James A. Davis
Department of Math & Statistics Faculty Publications
Most of the examples of PDS have come in p-groups, and most of these examples are in elementary abelian p-groups. In this paper, we will show an exponent bound for PDS with the same parameters as the elementary abelian case.
Letter From The Editor, Issue 10, 1994, Alvin White
Letter From The Editor, Issue 10, 1994, Alvin White
Humanistic Mathematics Network Journal
No abstract provided.
Female Voices In Mathematics: A New Course, Shobha Gulati
Female Voices In Mathematics: A New Course, Shobha Gulati
Humanistic Mathematics Network Journal
No abstract provided.
Poetry, Helen Lewy
Mathematics In Literature And Poetry, Joanne S. Growney
Mathematics In Literature And Poetry, Joanne S. Growney
Humanistic Mathematics Network Journal
No abstract provided.
Math: It's Not Just A Four Letter Word, Susan Byerly
Math: It's Not Just A Four Letter Word, Susan Byerly
Humanistic Mathematics Network Journal
No abstract provided.
Nctm Standards, Second Edition: A Review And Commentary On Zalman Usiskin's Address, Harald M. Ness
Nctm Standards, Second Edition: A Review And Commentary On Zalman Usiskin's Address, Harald M. Ness
Humanistic Mathematics Network Journal
No abstract provided.
What Changes Should Be Made For The Second Edition Of The Nctm Standards?, Zalman Usiskin
What Changes Should Be Made For The Second Edition Of The Nctm Standards?, Zalman Usiskin
Humanistic Mathematics Network Journal
No abstract provided.
Epsilon And Delta: A Little Love Story, Bonnie Shulman
Epsilon And Delta: A Little Love Story, Bonnie Shulman
Humanistic Mathematics Network Journal
No abstract provided.