user156441's user avatar
user156441's user avatar
user156441's user avatar
user156441
  • Member for 8 years, 7 months
  • Last seen more than 1 year ago
17 votes
3 answers
9k views

Graph of real continuous function has measure zero

15 votes
2 answers
5k views

$p$ prime, Group of order $p^n$ is cyclic iff it is an abelian group having a unique subgroup of order $p$

12 votes
1 answer
6k views

Equivalent norms understanding proof visually

11 votes
2 answers
2k views

group of module homomorphisms is a module

10 votes
4 answers
1k views

$\mathbb Z[i]/ \langle 1+2i \rangle \cong \mathbb Z_5$

9 votes
3 answers
352 views

$\mathbb Z^n/\langle (a,...,a) \rangle \cong \mathbb Z^{n-1} \oplus \mathbb Z/\langle a \rangle$

9 votes
1 answer
6k views

Prove that $\cos(z)$ and $\sin(z)$ are surjective over the complex numbers. [duplicate]

6 votes
1 answer
3k views

Cross ratio and symmetric points exercise

6 votes
2 answers
4k views

Connected topological spaces, product is connected

5 votes
1 answer
780 views

If $0 \to M \to N \to S \to 0$ splits, then $N \cong M \oplus N$

5 votes
0 answers
132 views

Proving a holomorphic function is constant on an open connected set under certain conditions. [duplicate]

5 votes
1 answer
2k views

$2\times 2$ matrix $C=AB-BA$

5 votes
1 answer
510 views

$SL_2(\mathbb Z_3)/Z(SL_2(\mathbb Z_3)) \cong A_4$

5 votes
2 answers
3k views

Eigenvalues of composition of functions

5 votes
2 answers
479 views

Lebesgue-measurable function problem

5 votes
2 answers
2k views

Zariski topology, non-empty intersection of open sets

5 votes
1 answer
2k views

Graph $G$ with different weights on edges has unique minimum spanning tree

4 votes
1 answer
500 views

Radius of convergence of two power series

4 votes
2 answers
511 views

For a semisimple ring, if $M \oplus P \cong N \oplus P$, then $M \cong N$ (finitely generated $M$, $N$, $P$)

4 votes
1 answer
839 views

Inner measure of Vitali Set

4 votes
3 answers
417 views

Group of order $135$ abelian and not cyclic

4 votes
2 answers
4k views

$M$ is a simple module if and only if $M \cong R/I$ for some $I$ maximal ideal in $R$.

4 votes
1 answer
478 views

Characterize semisimple rings of quotients

4 votes
1 answer
159 views

$G/Z(G) \cong \mathbb Z_p \times \mathbb Z_p$ then $p||Z(G)|$

3 votes
2 answers
2k views

Vector space as simple $K[x]$-module

3 votes
2 answers
4k views

Finding equilibrium points of differential equation

3 votes
1 answer
1k views

Semidirect products of $\mathbb Z_3$ and $\mathbb Z_4$

3 votes
2 answers
1k views

Proof of Gauss theorem (divergence theorem) in $\mathbb R^2$

3 votes
1 answer
694 views

If $f$,$g$ and $\overline{f}g$ are holomorphic on $\Omega$, then $g=0$ or $f$ is constant

3 votes
1 answer
322 views

Finding Möbius transformations that satistfy certain conditions

1
2 3 4 5
7