# Help with abstract algebra

1. ### Fulger

1
Help with abstract algebra!!

Here is my quetion.
What is the order of the set of all 2x2 matricies (such that its entries a,b,c,d are between 0 and p-1), and whose determinant is
congruent to 1 modulo p ?
=> Order of SL(2,Fp)
thanks :)

Last edited: Oct 16, 2005
2. ### Tom Mattson

5,538
Staff Emeritus
According to the section entitled "Homework Help" in the Physics Forums Global Guidelines which you agreed to:

So whatcha got?