Results 31 to 40 of about 6,568 (311)

Modified Gauss-Legendre, Lobatto and Radau cubature formulas for the numerical evaluation of 2-D singular integrals

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 1983
A numerical technique, first reported in 1979 in refs.[1] and [2], for the numerical evaluation of two-dimensional Cauchy-type principal-value integrals, is extended in this paper to include several cubature formlas of the Radau and Lobatto types.
P. S. Theocaris
doaj   +1 more source

A Direct Method for Solving Singular Integrals in Three-Dimensional Time-Domain Boundary Element Method for Elastodynamics

open access: yesMathematics, 2022
The analytically time integrable time-space domain (ATI-TSD) is discovered based on which the minimum time-space domain is identified for treatment on singularities in the three-dimensional time-domain boundary element method (3D TD-BEM) formulation.
Xiaofei Qin   +3 more
doaj   +1 more source

Singular integral operators associated to curves with rational components [PDF]

open access: yes, 2008
We prove L-p(R-n),1 < p < infinity, bounds for[GRAPHICS]and[GRAPHICS]where R-j(t) = P-j(t)/Q(j)(t),j = 1,2...,n, are rational functions. Our bounds depend only on the degrees of the polynomials P-j, Q(j) and, in particular, they do not depend on ...
Folch-Gabayet, Magali, Wright, James
core   +1 more source

SINGULAR INTEGRALS AND THE PRINCIPAL SERIES [PDF]

open access: yesProceedings of the National Academy of Sciences, 1969
The L 2 theory of singular integral operators on nilpotent Lie groups is studied, extending known results for IR n . The intertwining operators for the representations of the simple Lie groups of real rank one turn out to be of this type. As a result we
Knapp, A. W., Stein, Elias M.
openaire   +3 more sources

A Simple, Accurate and Semi-Analytical Meshless Method for Solving Laplace and Helmholtz Equations in Complex Two-Dimensional Geometries

open access: yesMathematics, 2022
A localized virtual boundary element–meshless collocation method (LVBE-MCM) is proposed to solve Laplace and Helmholtz equations in complex two-dimensional (2D) geometries.
Xingxing Yue   +3 more
doaj   +1 more source

Weighted norm inequalities for a class of rough singular integrals

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 2005
Weighted norm inequalities are proved for a rough homogeneous singular integral operator and its corresponding maximal truncated singular operator.
H. M. Al-Qassem
doaj   +1 more source

The finite part of divergent integrals with logarithmic factors

open access: yesMathematical Modelling and Analysis, 2011
The concepts of the finite part (f.p.) and analytic finite part (a.f.p.) of divergent integrals are defined in the situation where the singular function in the integral has a logarithmic factor.
Kaido Latt
doaj   +1 more source

Organoids in pediatric cancer research

open access: yesFEBS Letters, EarlyView.
Organoid technology has revolutionized cancer research, yet its application in pediatric oncology remains limited. Recent advances have enabled the development of pediatric tumor organoids, offering new insights into disease biology, treatment response, and interactions with the tumor microenvironment.
Carla Ríos Arceo, Jarno Drost
wiley   +1 more source

Numerical Quadrature for Singular Integrals on Fractals

open access: yes, 2022
We present and analyse numerical quadrature rules for evaluating regular and singular integrals on self-similar fractal sets. The integration domain $\mathbb{R}^n$ is assumed to be the compact attractor of an iterated function system of contracting ...
Hewett, D. P.   +6 more
core   +1 more source

Spatiotemporal and quantitative analyses of phosphoinositides – fluorescent probe—and mass spectrometry‐based approaches

open access: yesFEBS Letters, EarlyView.
Fluorescent probes allow dynamic visualization of phosphoinositides in living cells (left), whereas mass spectrometry provides high‐sensitivity, isomer‐resolved quantitation (right). Their synergistic use captures complementary aspects of lipid signaling. This review illustrates how these approaches reveal the spatiotemporal regulation and quantitative
Hiroaki Kajiho   +3 more
wiley   +1 more source

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