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Feb
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revised Prime polynomials over GF(q)
adding relevant tag
Feb
25
suggested approved edit on Prime polynomials over GF(q)
Feb
25
asked co-idempotents: algebraic dual of an idempotent element?
Feb
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answered Comultiplication of sum
Feb
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revised dimension of tensor products over a submodule
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asked dimension of tensor products over a submodule
Jan
26
comment Category of $\textbf{Ring}$.
it's sometimes easier to have a convention that excludes slightly trivial or slightly pathological examples. Dummit and Foote just take a ring to mean something with a unit, they never deal with unit-less rings, and it's extra baggage to carry that around when you aren't using it.
Jan
26
comment Univariate and Matrix Representation of Affine Transformation
the map $\phi$ is implicit in what I'm doing, it's essentially a change-of-basis matrix. if you let $e_i$ be the canonical basis (a column with all 0s except on the i-th row, that's a 1) for $\mathbb{F}^n$, then $\phi : \mathbb{F}^n \to \mathbb{E}^n$ by $e_i \mapsto \{\text{some expression in the t basis I gave}\}$ then it'll do the trick.
Jan
25
comment Univariate and Matrix Representation of Affine Transformation
I'm not 100% sure I'm correct on the last step, but hopefully you see the idea now? :)
Jan
25
revised Univariate and Matrix Representation of Affine Transformation
expanding a lot
Jan
25
comment Application of Category Theory
you might look at these questions: math.stackexchange.com/questions/312605/… and mathoverflow.net/questions/19325/… (heavier maths there)
Jan
25
revised Univariate and Matrix Representation of Affine Transformation
missing a key detail about the finite field.
Jan
25
answered Univariate and Matrix Representation of Affine Transformation
Jan
25
suggested approved edit on Univariate and Matrix Representation of Affine Transformation