List questions from normed-spaces

Published on 06 Jul 2016 - 3:09

38

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Prove a series finite a.e by proving that its $L_{1,\infty}$ norm is finite.

Published on 08 Jul 2016 - 10:13

65

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contraction mapping proof

Published on 10 Apr 2026 - 10:38

46

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Fibers of unbounded linear functional are dense

Published on 10 Apr 2026 - 14:19

86

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Determining whether equality $ \|T v\| = \|T\| \cdot \|v\|$ is possible

Published on 12 Apr 2026 - 15:44

66

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Difference between norm and distance.

Published on 12 Apr 2026 - 6:35

132

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Why does one necessarily need the triangle inequality

Published on 12 Apr 2026 - 9:08

95

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$A \subseteq \mathbb R^n $ s.t. for every continuous function $f : A \to \mathbb R$ , $f(A)$ is closed in $\mathbb R$ , is $A$ closed $\mathbb R^n$?

Published on 06 Apr 2026 - 17:33

55

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Simple norm inequality

Published on 12 Apr 2026 - 11:11

32

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A fast randomized algorithm for the approximation of matrices

Published on 13 Apr 2026 - 4:49

99

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closeness of matrices

Published on 13 Apr 2026 - 12:18

2.5k

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Inequality between operator norm and $\infty$-norm

Published on 09 Apr 2026 - 20:22

34

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Which of the followings are norms on $\mathbb R^2 ?$

Published on 13 Apr 2026 - 7:28

221

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Bounding sum of norms by the sum of sqaure of norms

Published on 13 Apr 2026 - 8:10

107

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For what value $p$ is $l_p$ not a norm or a metric?

Published on 07 Apr 2026 - 3:20

List Question

A lower bound for the ratio of $2$- and $\infty$-norms within a linear subspace

Prove a series finite a.e by proving that its $L_{1,\infty}$ norm is finite.

contraction mapping proof

Fibers of unbounded linear functional are dense

Determining whether equality $ \|T v\| = \|T\| \cdot \|v\|$ is possible

Difference between norm and distance.

Why does one necessarily need the triangle inequality

$A \subseteq \mathbb R^n $ s.t. for every continuous function $f : A \to \mathbb R$ , $f(A)$ is closed in $\mathbb R$ , is $A$ closed $\mathbb R^n$?

Simple norm inequality

A fast randomized algorithm for the approximation of matrices

closeness of matrices

Inequality between operator norm and $\infty$-norm

Which of the followings are norms on $\mathbb R^2 ?$

Bounding sum of norms by the sum of sqaure of norms

For what value $p$ is $l_p$ not a norm or a metric?

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