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Jun
26
comment Can a ring without a unit element have a subring with a unit element?
www-math.mit.edu/~poonen/papers/ring.pdf
May
12
awarded  Yearling
Apr
19
answered Uniqueness in Matrix Multiplication
Apr
8
comment if B is a maximal linearly independent set in V then B is a basis for V
It is a complete proof. Think about it some more.
Apr
8
comment if B is a maximal linearly independent set in V then B is a basis for V
Yes. I don't understand your line of questioning. Are you unfamiliar with proofs by contradiction?
Apr
7
comment if B is a maximal linearly independent set in V then B is a basis for V
That is the contradiction. ($B \cup \{w\}$ is linearly independent by assumption.)
Apr
7
answered if B is a maximal linearly independent set in V then B is a basis for V
Mar
3
revised Solving an equation in charcateristic 2 in sage OR finding 3-torsion points of an elliptic curve over field with char 2
Said "2-torsion" when "3-torsion" was meant
Mar
3
suggested suggested edit on Solving an equation in charcateristic 2 in sage OR finding 3-torsion points of an elliptic curve over field with char 2
Feb
23
answered For what values of $k$ does this system of equations have a unique solution?
Jan
16
answered Orthogonal Subspaces
Jan
16
awarded  Nice Question
Dec
12
answered What is the basis of basis?
Nov
29
comment Abstract Algebra: Field extensions
Right. The norm will be fixed since the composition of two automorphisms $\sigma_i$ and $\sigma_j$ is another automorphism $\sigma_k$.
Nov
28
answered Abstract Algebra: Field extensions
Nov
25
comment Important topics to cover in an intro course to algebraic number theory?
I can't upvote this answer enough.
Oct
9
answered Differences between infinite-dimensional and finite-dimensional vector spaces
Oct
3
comment Properties of Linear Transformations?
Very often, the motivation for studying a map $T:A \to B$ between algebraic objects is a scenario where we understand $B$ very well, and we wish to understand $A$ better. In order to be able to transfer information from $B$ back to $A$, we need our map $T$ to preserve the relevant structures.
Oct
3
comment Properties of Linear Transformations?
Oh, and $\mathbf{R}^n$ is an example of a vector space.
Oct
3
comment Properties of Linear Transformations?
they are somehow less useful to study. If you study more mathematics, you will encounter many more examples of this sort of thing, and it will make more sense then.