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I do not see why the upper limit of integration are u_1,...,u_{n-2} after the integration using the delta function. This form does not agree with the usual triangle loop, where after the integration with the delta one of the two remaining variables get as an upper limit, e.g., 1-x. — Preceding unsigned comment added by 2001:14BA:21DD:8AF0:62A4:4CFF:FE64:1148 ( talk) 18:51, 27 February 2016 (UTC)
That's for two variables. For many this is the correct upper limit. I'm putting back this form of the integrals, as it is the one I use most often and it is perfectly equivalent. It's taken from Weinberg. Aerthis ( talk) 21:18, 22 June 2016 (UTC)
This site has the proof of a slightly less general identity that might be integrated in this article. It could be a useful source for some copy-and-paste expansion of this article, as it is licensed under FDL. — Preceding unsigned comment added by Japs 88 ( talk • contribs) 13:12, 28 October 2011 (UTC)
what exactly is this making a breeze? -- MarSch 12:24, 18 December 2006 (UTC)
Since the results are not limited to integer powers, would it not be better to alter the last two multiple integrals to have -function pre-multipliers? (This would also imply what is generally true, that the method works for powers _n whose real parts are positive.)
Note, incidentally, that this method is useful in areas well outside quantum electodynamics! (I have used them many times in other areas.) Hair Commodore 20:17, 8 August 2007 (UTC)
This subject would be better described if an example or two were supplied. I will attempt to do so - soon(ish). Hair Commodore 17:16, 10 August 2007 (UTC)
Should not this page, and its brother at Schwinger parametrization have the spelling parameterization? (That's the way in which I - and many others have spelt it for many years ...) Hair Commodore 19:24, 20 August 2007 (UTC)
According to Sylvan Schweber's extensive (and classic) book, QED and the men who made it: Dyson, Feynman, Schwinger and Tomonaga (Princeton, 1994), the classical (simple: 1/(AB)) formula for Feynman parameterization (sic!) as recorded in the main article was given to Richard Feynman by Julian Schwinger. The latter left it to Feynman to develop and use. Hair Commodore 19:22, 28 August 2007 (UTC)
This article is rated Stub-class on Wikipedia's
content assessment scale. It is of interest to the following WikiProjects: | |||||||||||||||||||||
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I do not see why the upper limit of integration are u_1,...,u_{n-2} after the integration using the delta function. This form does not agree with the usual triangle loop, where after the integration with the delta one of the two remaining variables get as an upper limit, e.g., 1-x. — Preceding unsigned comment added by 2001:14BA:21DD:8AF0:62A4:4CFF:FE64:1148 ( talk) 18:51, 27 February 2016 (UTC)
That's for two variables. For many this is the correct upper limit. I'm putting back this form of the integrals, as it is the one I use most often and it is perfectly equivalent. It's taken from Weinberg. Aerthis ( talk) 21:18, 22 June 2016 (UTC)
This site has the proof of a slightly less general identity that might be integrated in this article. It could be a useful source for some copy-and-paste expansion of this article, as it is licensed under FDL. — Preceding unsigned comment added by Japs 88 ( talk • contribs) 13:12, 28 October 2011 (UTC)
what exactly is this making a breeze? -- MarSch 12:24, 18 December 2006 (UTC)
Since the results are not limited to integer powers, would it not be better to alter the last two multiple integrals to have -function pre-multipliers? (This would also imply what is generally true, that the method works for powers _n whose real parts are positive.)
Note, incidentally, that this method is useful in areas well outside quantum electodynamics! (I have used them many times in other areas.) Hair Commodore 20:17, 8 August 2007 (UTC)
This subject would be better described if an example or two were supplied. I will attempt to do so - soon(ish). Hair Commodore 17:16, 10 August 2007 (UTC)
Should not this page, and its brother at Schwinger parametrization have the spelling parameterization? (That's the way in which I - and many others have spelt it for many years ...) Hair Commodore 19:24, 20 August 2007 (UTC)
According to Sylvan Schweber's extensive (and classic) book, QED and the men who made it: Dyson, Feynman, Schwinger and Tomonaga (Princeton, 1994), the classical (simple: 1/(AB)) formula for Feynman parameterization (sic!) as recorded in the main article was given to Richard Feynman by Julian Schwinger. The latter left it to Feynman to develop and use. Hair Commodore 19:22, 28 August 2007 (UTC)