Results 41 to 50 of about 65,466 (259)

Sums of finite products of Chebyshev polynomials of the third and fourth kinds

open access: yesAdvances in Difference Equations, 2018
In this paper, we study sums of finite products of Chebyshev polynomials of the third and fourth kinds and obtain Fourier series expansions of functions associated with them. Then from these Fourier series expansions we will be able to express those sums
Taekyun Kim   +3 more
doaj   +1 more source

Finite products of limits of direct systems induced by maps

open access: yesApplied General Topology, 2015
Let Z, H be spaces. In previous work, we introduced the direct (inclusion) system induced by the set of maps between the spaces Z and H. Its direct limit is a subset of Z × H, but its topology is different from the relative topology.
Ivan Ivansic, Leonard R. Rubin
doaj   +1 more source

Factorization in Phase-Space Finite Geometry and Weak Mutually Unbiased Bases

open access: yesAfrican Scientific Reports, 2023
A phase-space factorization of lines in finite geometry G(m) with variables in Zm and its correspondence in finite Hilbert space H(m) for m a non-prime was discussed. Using the method of Good [15], lines in G(m) were factorized as products of lines G(mi)
A. D. Adeshola   +3 more
doaj   +1 more source

Finite sum – product logic

open access: yesTheory and Applications of Categories, 2001
Summary: In this paper we describe a deductive system for categories with finite products and coproducts, prove decidability of equality of morphisms via cut elimination, and prove a ``Whitman theorem'' for the free such categories over arbitrary base categories.
Cockett, J. R. B., Seely, R. A. G.
openaire   +2 more sources

On the Connection between Kronecker and Hadamard Convolution Products of Matrices and Some Applications

open access: yesJournal of Inequalities and Applications, 2009
We are concerned with Kronecker and Hadamard convolution products and present some important connections between these two products. Further we establish some attractive inequalities for Hadamard convolution product.
Adem Kılıçman   +1 more
doaj   +2 more sources

Faithful group actions and Schreier graphs

open access: yesKarpatsʹkì Matematičnì Publìkacìï, 2018
Each action of a finitely generated group on a set uniquely defines a labelled directed graph called the Schreier graph of the action. Schreier graphs are used mainly as a tool to establish geometrical and dynamical properties of corresponding group ...
M. Fedorova
doaj   +1 more source

Nonsolvable Groups Whose Degrees of All Proper Subgroups Are the Direct Products of at Most Two Prime Numbers

open access: yesJournal of Mathematics, 2022
Huppert and Manz have determined the nonsolvable groups whose character degrees are products of at most two prime numbers. In this paper, we change the condition from “degrees of a group are products of at most two prime divisors” to “degrees of all ...
Shitian Liu, Xingzheng Tang
doaj   +1 more source

Normal‐Appearing White Matter Injury Mediates Chronic Deep Venous Hypoxia and Disease Progression in Multiple Sclerosis

open access: yesAnnals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective To explore how cerebral hypoxia and Normal‐Appearing White Matter (NAWM) integrity affect MS lesion burden and clinical course. Methods Seventy‐nine MS patients, including 13 clinically isolated syndrome (CIS) patients and 66 relapsing–remitting multiple sclerosis (RRMS) patients, and 44 healthy controls (HCs) were recruited from ...
Xinli Wang   +8 more
wiley   +1 more source

On the Subsets Product in Finite Groups

open access: yesEuropean Journal of Combinatorics, 1991
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
openaire   +2 more sources

A Q‐Learning Algorithm to Solve the Two‐Player Zero‐Sum Game Problem for Nonlinear Systems

open access: yesInternational Journal of Adaptive Control and Signal Processing, Volume 39, Issue 3, Page 566-581, March 2025.
A Q‐learning algorithm to solve the two‐player zero‐sum game problem for nonlinear systems. ABSTRACT This paper deals with the two‐player zero‐sum game problem, which is a bounded L2$$ {L}_2 $$‐gain robust control problem. Finding an analytical solution to the complex Hamilton‐Jacobi‐Issacs (HJI) equation is a challenging task.
Afreen Islam   +2 more
wiley   +1 more source

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