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Aug
14
asked What, and how can, topological invariants can be computed from a space's algebra of functions?
Aug
3
asked profinite completion of a ring of integers in a global field
Feb
25
asked co-idempotents: algebraic dual of an idempotent element?
Feb
24
answered Comultiplication of sum
Feb
9
asked dimension of tensor products over a submodule
Jan
25
answered Univariate and Matrix Representation of Affine Transformation
Jan
23
asked kernel of maps associated to the root of an irreducible polynomial
Jan
14
asked when is a ring a free module over a subring?
Dec
20
asked Most efficient way to find distinct complementary subspaces over a finite field
Dec
9
asked What's the connection between irreducible polynomials and fixed-frobenius elements in a finite ring?
Nov
27
asked finding fixed points of frobenius endomorphism of a ring of char > $p$ (not a domain)
Jan
5
answered $U_q$ Quantum group and the four variables: $E, F, K, K^{-1}$
Dec
17
answered Prove well-definedness of comultiplication and counit of $GL_q(2)$ and $SL_q(2)$.
Dec
16
asked proving that a action of hopf algebra k(G) on A implies a G-grading on A
Aug
6
asked What are some examples of vector spaces that aren't graded?
Aug
3
answered proving that this coproduct and product get along well enough to make a bialgebra (Quantum Groups, Kassel)
Aug
1
asked proving that this coproduct and product get along well enough to make a bialgebra (Quantum Groups, Kassel)
Jul
4
asked what simple extensions can be naturally embedded into Conway's algebraic closure of $\mathbb{F}_2$?
May
8
answered What does the word “ideal” mean in this context?
May
7
asked What is a maximal abelian extension of a number field and what does its Galois group look like?