Results 1 to 10 of about 1,233,346 (75)

Comparando diferentes métodos de integração intervalar [PDF]

Vetor, 2016
Quando se trabalha com números de ponto flutuante o resultado obtido é apenas uma aproximação de um valor real e erros são gerados por arredondamentos ou por algoritmos instáveis, levando algumas vezes a resultados incorretos.
Maurício Dorneles Caldeira Balboni, Alice Fonseca Finger, Lucas Mendes Tortelli, Aline Brum Loreto   +3 more
doaj   +7 more sources

Stability Analysis of a Simple Discretization Method for a Class of Strongly Singular Integral Equations [PDF]

Integral equations and operator theory, 2023
Motivated by the discrete dipole approximation (DDA) for the scattering of electromagnetic waves by a dielectric obstacle that can be considered as a simple discretization of a Lippmann–Schwinger style volume integral equation for time-harmonic Maxwell ...
M. Costabel, M. Dauge, K. Nedaiasl
semanticscholar   +1 more source

INTEGRAL REPRESENTATION FORMULA FOR LINEAR NONAUTONOMOUS DIFFERENCE-DELAY EQUATIONS [PDF]

Journal of Integral Equations and Applications, 2023
This note states and proves an integral representation formula of the ``variation-of-constant'' type for continuous solutions of linear non-autonomous difference delay systems, in terms of a Lebesgue-Stieltjes integral involving a fundamental solution ...
L. Baratchart, S'ebastien Fueyo, Jean-Baptiste Pomet   +2 more
semanticscholar   +1 more source

The SHARK integral generation and digestion system

Journal of Computational Chemistry, 2022
In this paper, the SHARK integral generation and digestion engine is described. In essence, SHARK is based on a reformulation of the popular McMurchie/Davidson approach to molecular integrals.
F. Neese
semanticscholar   +1 more source

Integral reduction with Kira 2.0 and finite field methods [PDF]

Computer Physics Communications, 2020
We present the new version 2.0 of the Feynman integral reduction program Kira and describe the new features. The primary new feature is the reconstruction of the final coefficients in integration-by-parts reductions by means of finite field methods with ...
J. Klappert, Fabian Lange, P. Maierhöfer, J. Usovitsch   +3 more
semanticscholar   +1 more source

FIRE6: Feynman Integral REduction with modular arithmetic [PDF]

Computer Physics Communications, 2019
FIRE is a program performing reduction of Feynman integrals to master integrals. The C++ version of FIRE was presented in 2014. There have been multiple changes and upgrades since then including the possibility to use multiple computers for one reduction
Alexander V. Smirnov, Alexander V. Smirnov, F. S. Chukharev   +2 more
semanticscholar   +1 more source

INTEGRAL Detection of the First Prompt Gamma-Ray Signal Coincident with the Gravitational-wave Event GW170817 [PDF]

, 2017
We report the INTernational Gamma-ray Astrophysics Laboratory (INTEGRAL) detection of the short gamma-ray burst GRB 170817A (discovered by Fermi-GBM) with a signal-to-noise ratio of 4.6, and, for the first time, its association with the gravitational ...
V. Savchenko, C. Ferrigno, E. Kuulkers, A. Bazzano, E. Bozzo, S. Brandt, J. Chenevez, T. Courvoisier, R. Diehl, A. Domingo, L. Hanlon, E. Jourdain, A. Kienlin, P. Laurent, F. Lebrun, A. Lutovinov, A. Martin-Carrillo, S. Mereghetti, L. Natalucci, J. Rodi, J. Roques, R. Sunyaev, P. Ubertini   +22 more
semanticscholar   +1 more source

Controle ótimo com condição inicial intervalar

, 2013
Neste trabalho sera apresentado uma abordagem para resolver problemas de controle otimo quadratico linear irrestrito cuja condicao inicial possui incerteza do tipo intervalar. Para tal proposito, utilizar- se-a o conceito de equacao integral e um exemplo
U.A.S. Leal, Geraldo Silva, W. Lodwick
semanticscholar   +1 more source

Exatidão máxima no cálculo da probabilidade com distribuição Normal da Pressão Arterial Diastólica

, 2015
No estudo das variaveis aleatorias continuas sobre o conjunto dos numeros reais, R, um dos problemas e o calculo de probabilidades, visto que e necessario resolver uma integral definida da funcao densidade que, na maioria das vezes, nao possui primitiva ...
M. D. C. Balboni, L. M. Tortelli, A. Finger, A. Loreto   +3 more
semanticscholar   +1 more source

Kira - A Feynman integral reduction program [PDF]

Computer Physics Communications, 2017
In this article, we present a new implementation of the Laporta algorithm to reduce scalar multi-loop integrals appearing in quantum field theoretic calculations to a set of master integrals. We extend existing approaches by using an additional algorithm
P. Maierhöfer, J. Usovitsch, P. Uwer
semanticscholar   +1 more source