Question

Explicitly demonstrating non-compactness of closed unit ball in $l^{\infty}$

score 193 · Answer 1 · 2017-01-13 02:58:28

193

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Explicitly demonstrating non-compactness of closed unit ball in $l^{\infty}$

Published on 13 Jan 2017 - 2:58

score 727 · Answer 2 · 2017-01-13 06:07:33

727

Views

Proof of the Compactness Theorem for propositional logic by topological compactness

Published on 13 Jan 2017 - 6:07

score 601 · Answer 3 · 2017-01-13 19:09:23

601

Views

Example 4.21 in Baby Rudin: Why is the inverse of this function not continuous at this point?

Published on 13 Jan 2017 - 19:09

score 280 · Answer 4 · 2017-01-15 11:51:11

280

Views

Subsequences of a sequence in a topological space

Published on 15 Jan 2017 - 11:51

score 91 · Answer 5 · 2017-01-15 18:14:50

91

Views

What are the continuous functions from this space to the space $\mathbb{R}$ of real numbers with standard topology?

Published on 15 Jan 2017 - 18:14

score 71 · Answer 6 · 2017-01-15 23:51:03

71

Views

$G_{\delta }$ Sets in $\beta (\mathbb N)\setminus \mathbb N.$

Published on 15 Jan 2017 - 23:51

score 662 · Answer 7 · 2017-01-16 16:31:54

662

Views

Smallest closed ball enclosing a compact set

Published on 16 Jan 2017 - 16:31

score 761 · Answer 8 · 2017-01-17 10:39:54

761

Views

A topological space is locally compact then here is an open base at each point has all of its set with compact closure

Published on 17 Jan 2017 - 10:39

score 32 · Answer 9 · 2017-01-19 18:37:58

32

Views

Let $A \in M_n (\mathbb{C})$ and let $\rho (A) = max\{ \mid {\Lambda} : \Lambda$ is an eigenvalue of A \} $

Published on 19 Jan 2017 - 18:37

score 492 · Answer 10 · 2017-01-21 12:18:24

492

Views

Spivak Calculus on Manifolds - Problem 1.22

Published on 21 Jan 2017 - 12:18

score 118 · Answer 11 · 2026-03-28 14:07:38

118

Views

$C(X) := X \times [0,1]/ \sim $, when $(x_1,0) \sim (x_2,0)$ is connected.

Published on 28 Mar 2026 - 14:07

score 292 · Answer 12 · 2026-03-29 05:11:54

292

Views

Spivak Calculus on Manifolds - Problem 2.26 (d)

Published on 29 Mar 2026 - 5:11

score 924 · Answer 13 · 2017-01-22 09:07:42

924

Views

True or False : There exists a continuous map $f:[0,1] \to SL_2(\Bbb R)$ which is surjective. (NBHM 2017 exam India)

Published on 22 Jan 2017 - 9:07

score 943 · Answer 14 · 2017-01-24 00:14:12

943

Views

Closed $L^2$ unit ball in a closed subspace of $C[0,1]$ is compact

Published on 24 Jan 2017 - 0:14

score 85 · Answer 15 · 2017-01-24 20:04:28

85

Views

Showing that a subset is compact.

Published on 24 Jan 2017 - 20:04

List Question

Explicitly demonstrating non-compactness of closed unit ball in $l^{\infty}$

Proof of the Compactness Theorem for propositional logic by topological compactness

Example 4.21 in Baby Rudin: Why is the inverse of this function not continuous at this point?

Subsequences of a sequence in a topological space

What are the continuous functions from this space to the space $\mathbb{R}$ of real numbers with standard topology?

$G_{\delta }$ Sets in $\beta (\mathbb N)\setminus \mathbb N.$

Smallest closed ball enclosing a compact set

A topological space is locally compact then here is an open base at each point has all of its set with compact closure

Let $A \in M_n (\mathbb{C})$ and let $\rho (A) = max\{ \mid {\Lambda} : \Lambda$ is an eigenvalue of A \} $

Spivak Calculus on Manifolds - Problem 1.22

$C(X) := X \times [0,1]/ \sim $, when $(x_1,0) \sim (x_2,0)$ is connected.

Spivak Calculus on Manifolds - Problem 2.26 (d)

True or False : There exists a continuous map $f:[0,1] \to SL_2(\Bbb R)$ which is surjective. (NBHM 2017 exam India)

Closed $L^2$ unit ball in a closed subspace of $C[0,1]$ is compact

Showing that a subset is compact.

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