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Ehsaan
  • Member for 10 years, 11 months
  • Last seen this week
  • Waterloo, Ontario
26 votes
0 answers
490 views

Is there a group $G$ for which $\mathrm{Aut}(G) \simeq (\mathbb{R},+)$?

11 votes
3 answers
703 views

Examples of subgroups where it's nontrivial to show closure under multiplication?

10 votes
1 answer
370 views

Morita equivalent rings have homeomorphic spectra?

8 votes
2 answers
2k views

Prove that semi-simple rings are Dedekind-finite

8 votes
1 answer
928 views

Nontrivial examples of pro-$p$ groups

7 votes
1 answer
3k views

Inducing homomorphisms on localizations of rings/modules

7 votes
3 answers
2k views

Quotient of locally free sheaf is locally free?

7 votes
2 answers
335 views

Algebraic results using lower K-theory as a blackbox

6 votes
1 answer
819 views

If $N$ and $G/N$ are virtually solvable, then $G$ is virtually solvable?

6 votes
1 answer
739 views

Rank of projective module defined as the smallest $n$ such that $P$ is a direct summand of $R^n$

5 votes
1 answer
178 views

If the torsion subset of a group has "finite index", is the group torsion?

4 votes
1 answer
316 views

If $R$ is a simple ring, is every corner $eRe$ simple?

4 votes
2 answers
135 views

If $H$ is a Hilbert space, does the coordinate projection $\pi :H\oplus H\rightarrow H$ take closed subspaces to closed subspaces?

4 votes
4 answers
1k views

Is there a (f.g., free) module isomorphic to a quotient of itself?

4 votes
1 answer
505 views

Sheaf of sections vanishing at a point is $\Gamma(E) \otimes I_p$

4 votes
4 answers
484 views

An extension of line bundles splits locally

4 votes
2 answers
131 views

If $(x_n)$ is a linear recurrence, is the same true for the subsequence $(x_{pn+q})$?

3 votes
1 answer
1k views

"Local free"ness in vector bundles and projective modules

3 votes
1 answer
225 views

Ultralimit extends limit of nets?

2 votes
0 answers
80 views

Is ultrafilter convolution a special case of convolution of probability measures?

2 votes
0 answers
147 views

Hadamard quotient of D-finite series

2 votes
1 answer
124 views

Characterization of real intervals $[a,b]$ as posets

2 votes
1 answer
170 views

When are a set and its complement both syndetic?

2 votes
0 answers
53 views

If $G$ is a topological/algebraic group, is there a purely group-theoretic interpretation of $G^0$?

2 votes
0 answers
69 views

Proof that a particular subgroup is proper

2 votes
1 answer
747 views

Every modular right ideal is contained in a modular maximal ideal

2 votes
1 answer
209 views

Prove that $H^1(\mathcal{M}^*)=0$.

2 votes
1 answer
2k views

What's wrong with my proof that reductive Lie algebras are semisimple?

2 votes
0 answers
80 views

If $\mathbb{C}[G]$ is Noetherian and $G$ has a representation on $V$, when must $V$ be finite-dimensional?

1 vote
1 answer
769 views

Countable set in a Banach space which spans densely?