Let integer p and q
I make it p(q-1)/2.
Edit: Oh, those are floors. Ignore me then.
Why did the vector cross the road?
It wanted to be normal.
I presume you mean
Let p and q be integers (q > 1) which are relatively prime.
Consider the integers
Since p and q are coprime, no two of them are congruent modulo q. Hence all the numbers are a permutation of 1, 2, , q−1 (mod q). Hence if we write
Last edited by JaneFairfax (2008-11-10 01:28:44)