Category Archives: math
Let us prove:
Let be a short exact sequence, if the center then
Proof: When then , so .
If is a set with and such that then there are different of them.
Follow the link pascalbernoulli for a double induction proof.
such that .
By employing the Double Coset Counting Formula we have , and since then such that .
But so , hence, having , this implies that , where .
Then, for with we deduce it is