I'm reading this book and cannot make sense of the proof presented here: http://bit.ly/h8qAOJ
I have some understanding of abstract algebra but I'm not even sure if that's what we're dealing with here.
Some questions:
What is a homogeneous morphism? Is it the same as a homomorphism?
What does the notation "f [element of] Hom(v,u)" mean?
What does the notation "f = (f_1,...f_n)" mean? Is this a permutation group?
What is the degree of a homogeneous morphism?
What is A^p?
reddit xref: http://www.reddit.com/r/math/comments/fpzja/homogeneous_morphism_proof_from_perecs_life_a/