Pi Notation

Pi Notation (aka Product Notation) is a handy way to express products, as Sigma Notation expresses sums. The thumbnail shows the binomial coefficent expressed this way. While we won't be using this particular notation in our proof of the Basel Problem, Euler made use of it in his original proof. It is also handy in a more general form of the Basel Problem, which is what the Riemann Hypothesis is all about. ... https://www.youtube.com/watch?v=R0p4kvG0JGA