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So what happened with `Feynman's famous formula'? (See Witten et. al., Quantum fields and strings: A course for mathematicians, Volume 1, page 427, Proposition 1.3.) 22.214.171.124 (talk) 08:05, 2 February 2010 (UTC)
Can someone define the symbol "alpha" in section "Integrals with differential operators in the argument"? 126.96.36.199 (talk) 05:34, 22 September 2010 (UTC)