Results 21 to 30 of about 2,481 (254)

Approximation of the pth Roots of a Matrix by Using Trapezoid Rule

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 2012
The computation of the roots of positive definite matrices arises in nuclear magnetic resonance, control theory, lattice quantum chromo-dynamics (QCD), and several other areas of applications.
Amir Sadeghi, Ahmad Izani Md. Ismail
doaj   +1 more source

Fractional integro-differential equations with nonlocal conditions and ψ–Hilfer fractional derivative

open access: yesMathematical Modelling and Analysis, 2019
Considering a fractional integro-differential equation with nonlocal conditions involving a general form of Hilfer fractional derivative with respect to another function.
Mohammed S. Abdo   +2 more
doaj   +1 more source

KERNEL DETERMINATION PROBLEM FOR ONE PARABOLIC EQUATION WITH MEMORY

open access: yesUral Mathematical Journal, 2023
This paper studies the inverse problem of determining a multidimensional kernel function of an integral term which depends on the time variable \(t\) and \((n-1)\)-dimensional space variable \(x'= \left(x_1,\ldots, x_ {n-1}\right)\) in the \(n ...
Durdimurod K. Durdiev   +1 more
doaj   +1 more source

Lagrangian flows for vector fields with gradient given by a singular integral [PDF]

open access: yes, 2013
We prove quantitative estimates on ows of ordinary di erential equations with vector field with gradient given by a singular integral of an L1 function.
Crippa, Gianluca, Bouchut, Francois
core   +1 more source

An analog of the Cauchy formula for certain Beltrami equations

open access: yesУчёные записки Казанского университета: Серия Физико-математические науки, 2019
The Beltrami differential equations are intrinsic generalizations of the Cauchy–Riemann system in complex analysis. Their solutions generalize holomorphic functions. As known, solutions to many problems of the complex analysis are based on application of
D.B. Katz, B.A. Kats
doaj   +1 more source

Differential equations with tempered Ψ-Caputo fractional derivative

open access: yesMathematical Modelling and Analysis, 2021
In this paper we define a new type of the fractional derivative, which we call tempered Ψ−Caputo fractional derivative. It is a generalization of the tempered Caputo fractional derivative and of the Ψ−Caputo fractional derivative.
Milan Medveď, Eva Brestovanská
doaj   +1 more source

Relationship Between Cauchy Integral Theorem and Residue Theorems

open access: yesHighlights in Science, Engineering and Technology, 2023
Cauchy integral theorem belongs to an extremely important part of complex functions, which is a fundamental bridge, and people can derive Cauchy integral theorem from the residue theorem. Cauchy's integral theorem is generally applied in many higher mathematics, is an important theorem concerning path integrals of fully pure functions.
Jiaming Guo, Biran Song
openaire   +1 more source

A brief proof of Cauchy’s integral theorem [PDF]

open access: yesProceedings of the American Mathematical Society, 1971
A short proof of Cauchy’s theorem for circuits homologous to 0 is presented. The proof uses elementary local properties of analytic functions but no additional geometric or topological arguments.
openaire   +2 more sources

On the regularization of Cauchy-type integral operators via the density interpolation method and applications [PDF]

open access: yes, 2021
This paper presents a regularization technique for the high order efficient numerical evaluation of nearly singular, principal-value, and finite-part Cauchy-type integral operators.
Gomez, Vicente, Perez-Arancibia, Carlos
core   +1 more source

The Logic of Quantum Mechanics Derived from Classical General Relativity [PDF]

open access: yes, 1997
For the first time it is shown that the logic of quantum mechanics can be derived from Classical Physics. An orthomodular lattice of propositions, characteristic of quantum logic, is constructed for manifolds in Einstein's theory of general relativity. A
Hadley, Mark J.
core   +2 more sources

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