2007
DOI: 10.1590/s1806-11172007000300002
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Comentários sobre integrais impróprias que representam grandezas físicas

Abstract: Uma integral imprópria de função de variável real que representa certa grandeza físicaé freqüentemente calculada considerando-a como parte de uma integral no plano complexo cujo caminho de integração, num processo de limite, tende a incluir todo o eixo real, aproximando-se dos pólos reais do integrando de modo a produzir resultados fisicamente aceitáveis. Neste trabalho, descrevemos os métodos usualmente empregados no cálculo dessas integrais, comênfase em como as condições físicas determinam o modo de procede… Show more

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“…In fact, the + and − signs correspond, in the notation of Ref. [6], to the D −+ -and D +− -value of I(k x ), obtained with the first and second prescriptions shown in Fig. 4.…”
Section: First Methodsmentioning
confidence: 82%
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“…In fact, the + and − signs correspond, in the notation of Ref. [6], to the D −+ -and D +− -value of I(k x ), obtained with the first and second prescriptions shown in Fig. 4.…”
Section: First Methodsmentioning
confidence: 82%
“…The first integral, with the change of variable given by k x = k 0 u, becomes a known integral representation of the Neumann function of order zero 6 ∫…”
Section: First Methodsmentioning
confidence: 99%
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