Common integrals in quantum field theory: Difference between revisions

Revision as of 00:55, 2 January 2018

Revision as of 15:50, 4 August 2018

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This is best illustrated with a two-dimensional example.

===Example: Simple gaussianGaussian integration in two dimensions===

The gaussianGaussian integral in two dimensions is

:<math>\int \exp\left( - \frac 1 2 A_{ij} x^i x^j \right) d^2x = \sqrt{\frac{(2\pi)^2}{\det A}}</math>