MathGroup Archive 2007

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Functional Integration

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  • Subject: [mg83067] Functional Integration
  • From: Paul <paulbird at>
  • Date: Fri, 9 Nov 2007 05:16:25 -0500 (EST)

I wondered if it is possible to do "functional integration" in

e.g. something like:

FunctionalIntegral[ exp[ - Int[ F(x)*D(x,y)*F(x) ,x,y]  ] * F(a) *
F(b) , F ] = D^(-1)(a,b)

where D^(-1) is the inverse of the continuous matrix D.

Since things like field theory and string theory are based on
functional integrals this would be a very useful thing to have. Plus
since most solvable functional integrals are simple Gaussians then
this shouldn't be too hard to implement(?)

If not, are there any plans to implement this in future versions of

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