List questions from normed-spaces

Published on 22 Jan 2018 - 17:08

183

Views

A property of absolute norm inequality

Published on 22 Mar 2026 - 8:22

233

Views

What is the condition $|f(x)| \le f(|x|)$ called?

Published on 25 Mar 2026 - 3:07

30

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integrand of norm subjected to translation

Published on 22 Mar 2026 - 7:53

606

Views

Computing the norms of a non-principal ideal in $\Bbb Z[\sqrt{-5}]$?

Published on 25 Mar 2026 - 4:40

1.4k

Views

Is the total variation norm of a measure equal to its norm as a bounded functional?

Published on 25 Mar 2026 - 6:12

71

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How do I calculate the angle between this two vectors?

Published on 21 Mar 2026 - 5:47

138

Views

is a normed space is always closed?

Published on 22 Mar 2026 - 9:31

128

Views

Is it a equivalent semi norm in Campanato space?

Published on 23 Mar 2026 - 10:54

435

Views

An upper-bound for $\text{trace}(A^2)$ in terms of $\text{trace}(A)$

Published on 25 Mar 2026 - 4:39

294

Views

How to find the norm of this vector and the angles between him and other?

Published on 21 Mar 2026 - 3:38

74

Views

Is $\left\lVert f_U-f_V\right\rVert_{op}\leq \left\lVert U-V\right\rVert_2$ where $f_U = A\mapsto UAU^*$?

Published on 24 Mar 2026 - 10:58

274

Views

What is the operator norm of this operator?

Published on 22 Mar 2026 - 9:14

109

Views

How to bound the L-2 norm of the product of two non-square matrices

Published on 20 Mar 2026 - 8:05

45

Views

Show that if $\phi \in L^1(\mathbf R)$ and $f \in C_c(\mathbf R)$ then the convolution $\phi * f \in L^\infty(\mathbf R)$

Published on 25 Mar 2026 - 17:27

List Question

Obtaining an equality for product of $L^2$-norms

A property of absolute norm inequality

What is the condition $|f(x)| \le f(|x|)$ called?

integrand of norm subjected to translation

Computing the norms of a non-principal ideal in $\Bbb Z[\sqrt{-5}]$?

Is the total variation norm of a measure equal to its norm as a bounded functional?

How do I calculate the angle between this two vectors?

is a normed space is always closed?

Is it a equivalent semi norm in Campanato space?

An upper-bound for $\text{trace}(A^2)$ in terms of $\text{trace}(A)$

How to find the norm of this vector and the angles between him and other?

Is $\left\lVert f_U-f_V\right\rVert_{op}\leq \left\lVert U-V\right\rVert_2$ where $f_U = A\mapsto UAU^*$?

What is the operator norm of this operator?

How to bound the L-2 norm of the product of two non-square matrices

Show that if $\phi \in L^1(\mathbf R)$ and $f \in C_c(\mathbf R)$ then the convolution $\phi * f \in L^\infty(\mathbf R)$

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