Functional Analysis and Mathematical Optimization

A special issue of Mathematics (ISSN 2227-7390). This special issue belongs to the section "Computational and Applied Mathematics".

Deadline for manuscript submissions: 31 August 2024 | Viewed by 747

Special Issue Editors


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Guest Editor
Saskatchewan Polytechnic, 1130 Idylwyld Drive North, Saskatoon, SK, Canada
Interests: functional analysis; data science; optimization; operator theory; operations research

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Guest Editor
School of Mathematics and Statistics, Southwest University, RC9G+RJQ, Bayi Rd, Beibei District, Chongqing 400715, China
Interests: computational number theory: properties of algebraic integers, rational approximations of irrational numbers, etc.

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Guest Editor
School of Mathematics and Statistics, Southwest University, RC9G+RJQ, Bayi Rd, Beibei District, Chongqing 400715, China
Interests: nonlinear functional analysis; nonlinear elliptic equations; Hamiltonian systems

Special Issue Information

Dear Colleagues,

The theory of mathematical optimization or mathematical programming is at the crossroads of many subjects. The subject grew from a realization that quantitative problems in manifestly different disciplines have important mathematical elements in common. Because of this commonality, many problems can be formulated and solved by using the unified set of ideas and methods that make up the field of optimization. The terms “minimum,” “maximum,” and “optimum” are in line with the mathematical tradition. Historically, linear programs were the focus in the optimization community, and initially, it was thought that the major divide was between linear and nonlinear optimization problems; later, people discovered that some nonlinear problems were much harder than others, and the “right” divide was between convex and nonconvex problems. Optimization is also generally divided into two subfields: discrete optimization and continuous optimization. Optimization problems arise in all quantitative disciplines, from computer science and engineering to operations research and economics, and the development of solution methods has been of interest in mathematics for centuries.

Functional analysis is a branch of mathematical analysis dealing with functionals, or functions of functions. A functional, like a function, is a relationship between objects, but the objects may be numbers, vectors, or functions. Groupings of such objects are called spaces. Functional analysis is a subject that is seen as the study of vector spaces endowed with a topology, and in particular, infinite dimensional spaces. An important part of functional analysis is the extension of the theories of measureintegration, and probability to infinite dimensional spaces.

Optimization and functional analysis are interrelated. Regarding function space methods for optimization problems, much discussion has taken place.  For example, the necessary optimality conditions can, in general, be written as nonlinear operator equations for the primal variable and Lagrange multiplier. The Lagrange multiplier theory of a general class of non-smooth and non-convex optimization can be based on functional analysis tools. Many of the constraints for optimization problems may also be governed by partial differential and functional equations, and/or non-smooth and non-convex operator equations.

Dr. Renying Zeng
Prof. Dr. Qiang Wu
Prof. Dr. Chunlei Tang
Guest Editors

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Keywords

  • functional analysis
  • number theory
  • operator theory
  • theories of measure, integration, and probability in infinite dimensional spaces
  • applications of functional analysis
  • discrete optimization
  • continuous optimization
  • stochastic optimization
  • optimization algorithms
  • calculus of variations
  • optimization techniques and applications

Published Papers (1 paper)

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Research

10 pages, 269 KiB  
Article
µ-Integrable Functions and Weak Convergence of Probability Measures in Complete Paranormed Spaces
by Renying Zeng
Mathematics 2024, 12(9), 1333; https://doi.org/10.3390/math12091333 - 27 Apr 2024
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Abstract
This paper works with functions defined in metric spaces and takes values in complete paranormed vector spaces or in Banach spaces, and proves some necessary and sufficient conditions for weak convergence of probability measures. Our main result is as follows: Let X be [...] Read more.
This paper works with functions defined in metric spaces and takes values in complete paranormed vector spaces or in Banach spaces, and proves some necessary and sufficient conditions for weak convergence of probability measures. Our main result is as follows: Let X be a complete paranormed vector space and Ω an arbitrary metric space, then a sequence {μn} of probability measures is weakly convergent to a probability measure μ if and only if limnΩg(s)dμn=Ωg(s)dμ for every bounded continuous function g: Ω → X. A special case is as the following: if X is a Banach space, Ω an arbitrary metric space, then {μn} is weakly convergent to μ if and only if limnΩg(s)dμn=Ωg(s)dμ for every bounded continuous function g: Ω → X. Our theorems and corollaries in the article modified or generalized some recent results regarding the convergence of sequences of measures. Full article
(This article belongs to the Special Issue Functional Analysis and Mathematical Optimization)
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