Question

How to prove a transformation exists and is valid between two objects.

score 126 · Answer 1 · 2026-03-30 12:21:17

126

Views

How to prove a transformation exists and is valid between two objects.

Published on 30 Mar 2026 - 12:21

score 64 · Answer 2 · 2018-05-25 14:43:50

64

Views

$\mathbb{R}^n \setminus C_r(0)$, $r>0$ connected for n>1

Published on 25 May 2018 - 14:43

score 52 · Answer 3 · 2018-05-25 16:05:59

52

Views

Is similarity defined for proper classes?

Published on 25 May 2018 - 16:05

score 489 · Answer 4 · 2026-03-25 11:16:27

489

Views

If $g \circ f $ and $f$ are covering maps, then so is $g$

Published on 25 Mar 2026 - 11:16

score 837 · Answer 5 · 2018-05-25 21:34:26

837

Views

Describing the preimage of a continuous function at a point.

Published on 25 May 2018 - 21:34

score 1.4k · Answer 6 · 2026-03-30 23:12:40

1.4k

Views

Is closed subset of irreducible irreducible?

Published on 30 Mar 2026 - 23:12

score 854 · Answer 7 · 2026-03-26 01:12:47

854

Views

Is the closure $\overline{ \{X \in \mathbb{R}^{m \times n} : \rho(M-NX) < 1\} }$ equal to $ \{X \in \mathbb{R}^{m \times n} : \rho(M-NX) \le 1\}$

Published on 26 Mar 2026 - 1:12

score 36 · Answer 8 · 2018-05-26 00:18:26

36

Views

Is there a definition of a r-interior similar to that of a r-neighborhood?

Published on 26 May 2018 - 0:18

score 170 · Answer 9 · 2026-04-01 15:07:40

170

Views

Degree 4 Regular based covering maps of the Torus with corresponding normal subgroup.

Published on 01 Apr 2026 - 15:07

score 163 · Answer 10 · 2026-04-01 15:08:56

163

Views

Find presentations of fundamental groups of topological spaces.

Published on 01 Apr 2026 - 15:08

score 487 · Answer 11 · 2026-03-28 11:34:17

487

Views

Is the set of all real symmetric matrices all of whose eigenvalues satisfy $|λ| \le 2 $ compact?

Published on 28 Mar 2026 - 11:34

score 227 · Answer 12 · 2026-04-06 17:12:01

227

Views

What is the closure of the level set of convex function $g(x):R^n\rightarrow R,$ $\{x:g(x)<a\}$.

Published on 06 Apr 2026 - 17:12

score 172 · Answer 13 · 2026-03-25 03:21:29

172

Views

$V = W \cap W^{-1}$ a symmetric neighborhood such that $V\cdot V \subset U$.

Published on 25 Mar 2026 - 3:21

score 220 · Answer 14 · 2018-05-26 16:58:57

220

Views

Is the union of open neighbourhoods of all rational numbers always $\mathbb{R}$?

Published on 26 May 2018 - 16:58

score 83 · Answer 15 · 2026-03-27 14:52:48

83

Views

How is it possible to recover properties of compactness, connectedness, hausdorff, of topological space by using the category of sheaves

Published on 27 Mar 2026 - 14:52

List Question

How to prove a transformation exists and is valid between two objects.

$\mathbb{R}^n \setminus C_r(0)$, $r>0$ connected for n>1

Is similarity defined for proper classes?

If $g \circ f $ and $f$ are covering maps, then so is $g$

Describing the preimage of a continuous function at a point.

Is closed subset of irreducible irreducible?

Is the closure $\overline{ \{X \in \mathbb{R}^{m \times n} : \rho(M-NX) < 1\} }$ equal to $ \{X \in \mathbb{R}^{m \times n} : \rho(M-NX) \le 1\}$

Is there a definition of a r-interior similar to that of a r-neighborhood?

Degree 4 Regular based covering maps of the Torus with corresponding normal subgroup.

Find presentations of fundamental groups of topological spaces.

Is the set of all real symmetric matrices all of whose eigenvalues satisfy $|λ| \le 2 $ compact?

What is the closure of the level set of convex function $g(x):R^n\rightarrow R,$ $\{x:g(x)<a\}$.

$V = W \cap W^{-1}$ a symmetric neighborhood such that $V\cdot V \subset U$.

Is the union of open neighbourhoods of all rational numbers always $\mathbb{R}$?

How is it possible to recover properties of compactness, connectedness, hausdorff, of topological space by using the category of sheaves

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