Path integrals

You can now find the announced notes on path integrals on the semester page, which both summarize what we did so far in the lecture (and a bit more), and fill in some of the gaps... happy reading^* ! :)

^{* reading means of course as usual actual work -- but try do not get hung up in the details of how the path integrals are defined and performed, at least at first and second reading, it's more much important that you obtain a good handle on how to use functional derivatives and generating functionals.}

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