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Convergence Methods for Double Sequences and Applications
  • Language: en
  • Pages: 171

Convergence Methods for Double Sequences and Applications

This book exclusively deals with the study of almost convergence and statistical convergence of double sequences. The notion of “almost convergence” is perhaps the most useful notion in order to obtain a weak limit of a bounded non-convergent sequence. There is another notion of convergence known as the “statistical convergence”, introduced by H. Fast, which is an extension of the usual concept of sequential limits. This concept arises as an example of “convergence in density” which is also studied as a summability method. Even unbounded sequences can be dealt with by using this method. The book also discusses the applications of these non-matrix methods in approximation theory. ...

Applied Summability Methods
  • Language: en
  • Pages: 124

Applied Summability Methods

This short monograph is the first book to focus exclusively on the study of summability methods, which have become active areas of research in recent years. The book provides basic definitions of sequence spaces, matrix transformations, regular matrices and some special matrices, making the material accessible to mathematicians who are new to the subject. Among the core items covered are the proof of the Prime Number Theorem using Lambert's summability and Wiener's Tauberian theorem, some results on summability tests for singular points of an analytic function, and analytic continuation through Lototski summability. Almost summability is introduced to prove Korovkin-type approximation theorems and the last chapters feature statistical summability, statistical approximation, and some applications of summability methods in fixed point theorems.

Double Sequence Spaces and Four-Dimensional Matrices
  • Language: en
  • Pages: 252

Double Sequence Spaces and Four-Dimensional Matrices

  • Type: Book
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  • Published: 2022-04-22
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  • Publisher: CRC Press

Double Sequence Spaces and Four-Dimensional Matrices provides readers with a clear introduction to the spaces of double sequences and series, as well as their properties. The book then goes beyond this to investigate paranormed double sequence spaces and their algebraic and topological properties, triangle matrices and their domains in certain spaces of double sequences, dual spaces of double sequence spaces, and matrix transformations between double sequence spaces and related topics. Each chapter contains a conclusion section highlighting the importance of results and pointing out possible new ideas that can be studied further. Features Suitable for students at graduate or post-graduate level and researchers Investigates different types of summable spaces and computes their duals Characterizes several four-dimensional matrix classes transforming one summable space into other Discusses several algebraic and topological properties of new sequence spaces generated by the domain of triangles.

Measure of Noncompactness, Fixed Point Theorems, and Applications
  • Language: en
  • Pages: 222

Measure of Noncompactness, Fixed Point Theorems, and Applications

  • Type: Book
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  • Published: 2024-04-24
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  • Publisher: CRC Press

The theory of the measure of noncompactness has proved its significance in various contexts, particularly in the study of fixed point theory, differential equations, functional equations, integral and integrodifferential equations, optimization, and others. This edited volume presents the recent developments in the theory of the measure of noncompactness and its applications in pure and applied mathematics. It discusses important topics such as measures of noncompactness in the space of regulated functions, application in nonlinear infinite systems of fractional differential equations, and coupled fixed point theorem. Key Highlights: • Explains numerical solution of functional integral equ...

Integral Transforms and Operational Calculus
  • Language: en
  • Pages: 510

Integral Transforms and Operational Calculus

  • Type: Book
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  • Published: 2019-11-20
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  • Publisher: MDPI

Researches and investigations involving the theory and applications of integral transforms and operational calculus are remarkably wide-spread in many diverse areas of the mathematical, physical, chemical, engineering and statistical sciences. This Special Issue contains a total of 36 carefully-selected and peer-reviewed articles which are authored by established researchers from many countries. Included in this Special Issue are review, expository and original research articles dealing with the recent advances on the topics of integral transforms and operational calculus as well as their multidisciplinary applications

Summability Theory and Its Applications
  • Language: en
  • Pages: 865

Summability Theory and Its Applications

  • Type: Book
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  • Published: 2022-06-27
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  • Publisher: CRC Press

Summability Theory and Its Applications explains various aspects of summability and demonstrates its applications in a rigorous and coherent manner. The content can readily serve as a reference or as a useful series of lecture notes on the subject. This substantially revised new edition includes brand new material across several chapters as well as several corrections, including: the addition of the domain of Cesaro matrix C(m) of order m in the classical sequence spaces to Chapter 4; and introducing the domain of four-dimensional binomial matrix in the spaces of bounded, convergent in the Pringsheim's sense, both convergent in the Pringsheim's sense and bounded, and regularly convergent double sequences, in Chapter 7. Features Investigates different types of summable spaces and computes their dual Suitable for graduate students and researchers with a (special) interest in spaces of single and double sequences, matrix transformations and domains of triangle matrices Can serve as a reference or as supplementary reading in a computational physics course, or as a key text for special Analysis seminars.

Advances in Summability and Approximation Theory
  • Language: en
  • Pages: 241

Advances in Summability and Approximation Theory

  • Type: Book
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  • Published: 2018-12-30
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  • Publisher: Springer

This book discusses the Tauberian conditions under which convergence follows from statistical summability, various linear positive operators, Urysohn-type nonlinear Bernstein operators and also presents the use of Banach sequence spaces in the theory of infinite systems of differential equations. It also includes the generalization of linear positive operators in post-quantum calculus, which is one of the currently active areas of research in approximation theory. Presenting original papers by internationally recognized authors, the book is of interest to a wide range of mathematicians whose research areas include summability and approximation theory. One of the most active areas of research...

Scientia Magna, Vol. 8, No. 1, 2012
  • Language: en
  • Pages: 128

Scientia Magna, Vol. 8, No. 1, 2012

Papers on the hybrid mean value of the Smarandache kn digital, separation axioms in an ordered intuitionistic fuzzy bitopological space, iterations of strongly pseudocontractive maps in Banach spaces, certain differential subordination involving a multiplier transformation, modified multi-step Noor method for a finite family of strongly pseudo-contractive maps, and similar topics. Contributors: N. Subramanian, R. N. Devi, U. K. Misra, A. A. Mogbademu, S. Hussain, S. Panayappan, S. Chauhan, and others.

Approximation Theory, Sequence Spaces and Applications
  • Language: en
  • Pages: 277

Approximation Theory, Sequence Spaces and Applications

This book publishes original research chapters on the theory of approximation by positive linear operators as well as theory of sequence spaces and illustrates their applications. Chapters are original and contributed by active researchers in the field of approximation theory and sequence spaces. Each chapter describes the problem of current importance and summarizes ways of their solution and possible applications which improve the current understanding pertaining to sequence spaces and approximation theory. The presentation of the articles is clear and self-contained throughout the book.

Sequence Space Theory with Applications
  • Language: en
  • Pages: 307

Sequence Space Theory with Applications

  • Type: Book
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  • Published: 2022-07-20
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  • Publisher: CRC Press

The book features original chapters on sequence spaces involving the idea of ideal convergence, modulus function, multiplier sequences, Riesz mean, Fibonacci difference matrix etc., and illustrate their involvement in various applications. The preliminaries have been presented in the beginning of each chapter and then the advanced discussion takes place, so it is useful for both expert and nonexpert on aforesaid topics. The book consists of original thirteen research chapters contributed by the well-recognized researchers in the field of sequence spaces with associated applications. Features Discusses the Fibonacci and vector valued difference sequence spaces Presents the solution of Volterr...