I'm looking over the solution for one of my assignment questions, which is the picture you see here.
A part of a solution says "Supose [a] = [a]^-1. This implies that a^2 is congruent to 1 mod p." I do not get how it transitioned between the steps.
Hey, can you post up the full solution? I just want to make sure I am interpreting the notation correctly before I answer your question.
Content will be erased after question is completed.
Enter the email address associated with your account, and we will email you a link to reset your password.
Forgot your password?