Question

The differentiation process is unstable with the $||f||_{\infty}=\text{max}_{0\leq x\leq 1}|f(x)|$, where $f\in C^1[0,1]$.

score 161 · Answer 1 · 2018-02-25 18:04:08

161

Views

The differentiation process is unstable with the $||f||_{\infty}=\text{max}_{0\leq x\leq 1}|f(x)|$, where $f\in C^1[0,1]$.

Published on 25 Feb 2018 - 18:04

score 27 · Answer 2 · 2018-02-25 19:06:39

27

Views

Connectivity of the space of $l_p^n$s

Published on 25 Feb 2018 - 19:06

score 143 · Answer 3 · 2018-02-25 19:09:57

143

Views

Find norm of the operator $A: C[-1,1] \to C[-1,1]$, $(Ax)(t) = \int_{-1}^t x(s) ds - \int_0^1 s x(s) ds$

Published on 25 Feb 2018 - 19:09

score 53 · Answer 4 · 2018-02-26 11:19:32

53

Views

Why is $||\cdot||_1=\sum_{i=1}^n |x_i|$ not strictly subadditive (in $\mathbb{R}^2$)?

Published on 26 Feb 2018 - 11:19

score 76 · Answer 5 · 2026-03-25 14:22:34

76

Views

linear map between two completions of a vectors space: is onto?

Published on 25 Mar 2026 - 14:22

score 92 · Answer 6 · 2026-03-25 07:39:49

92

Views

Characterizing Ideals in C(X)

Published on 25 Mar 2026 - 7:39

score 345 · Answer 7 · 2018-02-27 17:55:42

345

Views

Frechet derivative of bilinear map

Published on 27 Feb 2018 - 17:55

score 161 · Answer 8 · 2018-02-27 18:30:31

161

Views

Limit involving norm of matrices

Published on 27 Feb 2018 - 18:30

score 206 · Answer 9 · 2026-03-24 22:10:11

206

Views

Closed subspace

Published on 24 Mar 2026 - 22:10

score 17k · Answer 10 · 2026-03-23 05:54:13

17k

Views

Operator norm calculation for simple matrix

Published on 23 Mar 2026 - 5:54

score 90 · Answer 11 · 2026-03-25 12:22:23

90

Views

Verifying two (simple) inequalities about projections

Published on 25 Mar 2026 - 12:22

score 548 · Answer 12 · 2026-03-26 07:33:16

548

Views

Is there a semi-norm that respects matrix similitary?

Published on 26 Mar 2026 - 7:33

score 114 · Answer 13 · 2026-03-25 04:43:55

114

Views

$\sup_{\|\,f\|_{L^2(\mu)}=1}\big(\int_X \varphi_1^2\, f^2\,d\mu + \int_X \varphi_2^2 \,f^2\,d\mu\big)=\big\|\varphi_1^2+\varphi_2^2\big\|_\infty$

Published on 25 Mar 2026 - 4:43

score 558 · Answer 14 · 2026-03-25 12:24:46

558

Views

Is Schatten p-norm a monotone ideal norm?

Published on 25 Mar 2026 - 12:24

score 40 · Answer 15 · 2018-02-28 21:31:10

40

Views

Conditions on matrices such that $\| \boldsymbol{Ax} \|_2 \geq \| \boldsymbol{Bx} \|_2$ is satisfied

Published on 28 Feb 2018 - 21:31

List Question

The differentiation process is unstable with the $||f||_{\infty}=\text{max}_{0\leq x\leq 1}|f(x)|$, where $f\in C^1[0,1]$.

Connectivity of the space of $l_p^n$s

Find norm of the operator $A: C[-1,1] \to C[-1,1]$, $(Ax)(t) = \int_{-1}^t x(s) ds - \int_0^1 s x(s) ds$

Why is $||\cdot||_1=\sum_{i=1}^n |x_i|$ not strictly subadditive (in $\mathbb{R}^2$)?

linear map between two completions of a vectors space: is onto?

Characterizing Ideals in C(X)

Frechet derivative of bilinear map

Limit involving norm of matrices

Closed subspace

Operator norm calculation for simple matrix

Verifying two (simple) inequalities about projections

Is there a semi-norm that respects matrix similitary?

$\sup_{\|\,f\|_{L^2(\mu)}=1}\big(\int_X \varphi_1^2\, f^2\,d\mu + \int_X \varphi_2^2 \,f^2\,d\mu\big)=\big\|\varphi_1^2+\varphi_2^2\big\|_\infty$

Is Schatten p-norm a monotone ideal norm?

Conditions on matrices such that $\| \boldsymbol{Ax} \|_2 \geq \| \boldsymbol{Bx} \|_2$ is satisfied

Trending Questions

Popular # Hahtags

Popular Questions