- #1
- 5,654
- 1,559
Homework Statement
Given a field F, FS4 is a group algebra... we have a representation X that maps FS4 to 3x3 matrices over (presumably) F. Let V denote the FS4 module corresponding to X... do stuff. My question is, what the heck is V supposed to be?
I assumed that V is F3, but that seemingly contradicts what the question wants me to do. So is V the free module of the representation of FS4 over itself (and then why bother having a representation)? I can't think of what else it could be
The full question can be found at
http://www.maths.ox.ac.uk/courses/2008/part-b/b2-algebra/b2a-introduction-representation-theory/materialsheet 5, question 3
EDIT: I was wrong... if V=F3 the question's conclusion is correct. For some reason I was associating the 4 in S4 with F instead, and thought it had characteristic 4... I noticed my error when I realized a) it has characteristic 0 b) 4 isn't the characteristic of a field. Good job by me wasting an hour working in a non-existent field
Last edited: