Results 21 to 30 of about 1,130,446 (280)

A curious integral

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 1996
A double integral which came from a cohomology calculation is evaluated explicitly using the properties of 3F2 and 2F1 hypergeometric functions.
David R. Masson
doaj   +1 more source

Open/closed duality for FZZT branes in c=1 [PDF]

open access: yes, 2005
We describe how the matrix integral of Imbimbo and Mukhi arises from a limit of the FZZT partition function in the double-scaled c=1 matrix model.
A. Hashimoto   +34 more
core   +2 more sources

Double neutrosophic integrals

open access: yesNeutrosophic Sets and Systems, 2023
Several previous papers dealt with neutrosophic integrals without introducing the idea of double neutrosophic integrals. In this article, double integrals were discussed by presenting several theories in double neutrosophic integrals over a rectangle and over a general region, the most important of which is the neutrosophic Fubini's theorem.
Yaser Ahmad Alhasan   +2 more
openaire   +2 more sources

Application of the ARA Method in Solving Integro-Differential Equations in Two Dimensions

open access: yesComputation, 2022
The main purpose of this study is to investigate solutions of some integral equations of different classes using a new scheme. This research introduces and implements the new double ARA transform to solve integral and partial integro-differential ...
Rania Saadeh
doaj   +1 more source

Algebraic-geometrical formulation of two-dimensional quantum gravity [PDF]

open access: yes, 1995
We find a volume form on moduli space of double punctured Riemann surfaces whose integral satisfies the Painlev\'e I recursion relations of the genus expansion of the specific heat of 2D gravity.
A. A. Beilinson   +17 more
core   +3 more sources

Refined Wirtinger-type integral inequality

open access: yesJournal of Inequalities and Applications, 2018
Based on the extreme value conditions of a multiple variables function, a new class of Wirtinger-type double integral inequality is established in this paper.
Liansheng Zhang, Shuxia Wang
doaj   +1 more source

Design and implementation of double-integral sliding-mode controller for brushless direct current motor speed control

open access: yesAdvances in Mechanical Engineering, 2017
This article presents a double-integral sliding-mode controller with an adaptive proportional–integral–derivative observer for brushless direct current motor speed controller. First, an integral sliding-mode control is designed based on the motor dynamic
Seng-Chi Chen, Chun-Yi Kuo
doaj   +1 more source

A Novel Generalized Integral Inequality Based on Free Matrices for Stability Analysis of Time-Varying Delay Systems

open access: yesIEEE Access, 2020
This paper proposes a novel generalized integral inequality based on free matrices and applies it to stability analysis of time-varying delay systems. The proposed integral inequality estimates the upper bound of the augmented quadratic term of the state
Jun Hui Lee, In Seok Park, Poogyeon Park
doaj   +1 more source

Correlation kernels for sums and products of random matrices [PDF]

open access: yes, 2015
Let $X$ be a random matrix whose squared singular value density is a polynomial ensemble. We derive double contour integral formulas for the correlation kernels of the squared singular values of $GX$ and $TX$, where $G$ is a complex Ginibre matrix and $T$
Claeys, Tom   +2 more
core   +3 more sources

Solution of Integral Differential Equations by New Double Integral Transform (Laplace–Sumudu Transform)

open access: yesAbstract and Applied Analysis, 2020
The primary purpose of this research is to demonstrate an efficient replacement double transform named the Laplace–Sumudu transform (DLST) to unravel integral differential equations.
Shams A. Ahmed   +2 more
doaj   +1 more source

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