Source: http://web.mit.edu/dvp/www/Work/8.06/dvp-8.06-paper.pdf(adsbygoogle = window.adsbygoogle || []).push({});

Regarding page 5 of 14, I don't understand the multiple integrals thing.

Ain't we supposed to sum up all the paths like in this equation (4) but why do they instead multiply and integrate over integration and so on?

Also for equation (7) , shouldn't it be this instead?

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# Path Integral Formulation

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