Deriving Weierstrass representation of the Gamma function

[@norbertduchting6217]

You are using the same symbol k for two different things, namely as an index for a sum and an index for a product. You should use differnt symbols and explain why the result is still correct.

[@cipherunity]

It does not matter .
Prod_(k=1 to n) e^(s/k) =Prod_(b=1 to n) e^(s/b)