Question about Feynman’s path integrals

In summary, Feynman's path integrals, created by physicist Richard Feynman in the 1940s, are a mathematical tool used in quantum mechanics to calculate the probability of particle transitions over a period of time. They differ from traditional methods by considering all possible paths a particle could take, rather than just the most likely one. Widely accepted and used in theoretical physics, they have been confirmed through experiments and have been crucial in making predictions and discoveries in the field of quantum mechanics.
  • #1
Sophrosyne
128
21
In Feynman’s path integrals, there is:

∫dq″Π0(t″,t′;q″,q′)=1

What is the funny pi looking symbol?
 
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  • #2
I guess it's the product symbol.
 
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