- #1
ArcanaNoir
- 779
- 4
Homework Statement
I'm working on fields proof (intro level stuff) and I don't quite know how to interpret this field: (Zp, #, *) for prime p where [x]#[y]=[x+y] and [x]*[y]=[xy]
For (Z3, #, *), it was the 3 element set {0, 1, 2} and for example, 2#2=1 because 4 mod 3 is 1, and 1#2=0 for the same reason.
I'm supposed to show that this is a field but I can't figure out what the notation even means, what are the elements in the set, how do some of them operate on each other? That's what I need help with.
Homework Equations
A field means:
Both operations are associative and commutative
There is a identity element for #, and every element in the set has an inverse that gives #'s identity
there is an identity element for * that is not the same as the identity for #, and every element except For the identity element for # has an inverse that gives the identity for *
The Attempt at a Solution
Zp ={2, 3, 5, 7, 11,...}? Then 13#2=15_p=? Also, I don't see any identity or inverses here.