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seen May 31 '13 at 10:56

Mar
1
awarded  Popular Question
May
7
answered Field extension question.
May
1
revised Finite Groups: $a \in G \implies a \in H$
formatting and structure
May
1
answered Finite Groups: $a \in G \implies a \in H$
Apr
29
comment Finding an isomorphism of fields
To the OP, you can right click existing notational symbols here and bring up their TeX commands.
Apr
29
comment Finding cosets of a sub group of the polynomials
Edit: Nevermind, question already asked.
Apr
29
awarded  Commentator
Apr
29
comment If $G/H$ is finitely generated, then so is $G$
How does the normality of H come into play?
Apr
23
awarded  Informed
Apr
18
comment Homework - Prove that a given set is a group
What is the definition of a group?
Apr
8
awarded  Nice Question
Mar
13
comment Question on a homomorphism of a set G.
@ Kneidell, thanks for clearing that up.
Mar
13
comment Question on a homomorphism of a set G.
@ Yoni, you're correct. I was stuck in thinking that we had to consider only a specific value of n, not all powers of all roots of unity for all n.
Mar
12
asked Question on a homomorphism of a set G.
Nov
18
comment A Book for abstract Algebra
I've read all three titles, I would suggest Dummit and Foote if you're a beginner. Personally, I thought Rotman did a better job at explaining the ideas.
Oct
3
answered If $a^3 b = ba^3$ and if $ a $ has order 7, show that $ab = ba$
Sep
26
comment Example of a union of subfields that is not a field
Indeed a great observation.
Sep
23
awarded  Teacher
Sep
20
comment Why is $\zeta ^0 = 1$ here under this isomorphism?
We usually define the integers modulo 8 by {0,1,...,7} so the author is just sticking to standard notation. That's just what I think.
Sep
20
answered Why is $\zeta ^0 = 1$ here under this isomorphism?