Sophrosyne Messages 128 Reaction score 21 Thread starter May 17, 2022 #1 In Feynman’s path integrals, there is: ∫dq″Π0(t″,t′;q″,q′)=1 What is the funny pi looking symbol?
haushofer Science Advisor Insights Author Messages 3,085 Reaction score 1,608 May 18, 2022 #2 I guess it's the product symbol.