1 School of Mathematics, KNT University of Technology, Tehran, Iran. 2 Department of Mathematics, College of Basic Sciences, Karaj branch Islamic Azad University ...

Approximation of classes of -integrals of periodic functions of many variables by rectangular linear means of their Fourier series. Ukr Math J. (2005) 57: 678 – 86. 10.1007/s11253-005-0219-2 ...

Abstract: The concepts of the lower approximation integral, the upper approximation integral and rough integrals are given on the basis of function rough sets. Based on these concepts, the relation of ...

SOME of the electron repulsion integrals [ϕaχb|θcψd]=∫ϕa* (1)χb (1)r−112θ*cψd (2) d (1)d (2) which arise in the molecular orbital theory based on linear combinations of atomic orbitals are ...

Abstract: In this paper, we approximate the integration of continuous fuzzy real number valued function of one and two variables. To do this, we use Bernstein-type ...

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Learn how to approximate the integral of a function using the Reimann sum approximation. Reimann sum is an approximation of ...

Many modern semiempirical molecular orbital models are built on the neglect of diatomic differential overlap (NDDO) approximation. An in-depth understanding of this approximation is therefore ...

This package supports computing singular integrals involving Hilbert/Stieltjes/Cauchy, log, and power law kernels.

The function newtoniansquare([x,y], p) computes a matrix of Newtonian potentials of Legendre polynomials on the unit square $Ω := [-1,1]^2$. That is it computes ...