User ChrisNick92

12 votes

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Can we replace finite with countably infinite sequences in the definition of absolute continuous functions?

answered Apr 13, 2021 at 9:21

6 votes

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A simple ring which is not semisimple

answered Apr 4, 2021 at 21:54

4 votes

Operator norm of integral operator operator, bound from below

answered Apr 28, 2021 at 21:10

3 votes

To prove it is a Schauder basis?

answered Apr 29, 2021 at 18:10

3 votes

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Banach subspace of Banach space

answered Mar 25, 2021 at 13:04

3 votes

Any uncountable subset $S$ of $\mathbb{C}$ must have a limit point .

answered Apr 4, 2018 at 14:21

3 votes

The volume of a solid bounded by two cylinders and two cones.

answered Apr 12, 2018 at 7:13

3 votes

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Subsequence construction for lebesgue inequality

answered May 5, 2018 at 19:21

3 votes

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Is this space normed or not?

answered Nov 16, 2020 at 14:13

3 votes

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Limit of operator norm

answered Nov 21, 2020 at 23:13

3 votes

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prove the recurrence sequence is convergent

answered Dec 10, 2020 at 7:00

2 votes

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Uniform convergence of a sequence of functions on real line.

answered Dec 10, 2020 at 12:41

2 votes

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Prove this integration by parts formula

answered Nov 25, 2020 at 20:50

2 votes

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Is the limit of a sequence of continuous linear operators in the weak operator topology again a continuous linear operator?

answered Dec 11, 2020 at 21:14

2 votes

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Weakly convergent nets and compact operators

answered Dec 6, 2020 at 22:17

2 votes

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The James Space

answered Nov 18, 2020 at 22:01

2 votes

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Let $X$ be a normed space and $M$ a finite dimension subspace, $M\neq X$. Prove that $\exists x\in X$ such that $||x||=d(x,M)=1$. And prove...

answered Nov 22, 2020 at 20:07

2 votes

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Bolzano-Weierstrass on $\mathbb{R}^n$ with different Norms

answered Nov 12, 2020 at 15:44

2 votes

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Prove that $C([0,1]),||.||)$ with $||x||= \text{sup}_{t \in [0,1]}|tx(t)|$ is not complete using equivalence of norms

answered Nov 16, 2020 at 17:47

2 votes

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Convergent sequence in Range has convergent premimage for a surjective bounded operator

answered Nov 6, 2020 at 16:34

2 votes

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If $f$ is bounded then convolution $f*g$ is continuous

answered Nov 2, 2020 at 18:43

2 votes

how to solve Lazy janitor problem

answered Oct 29, 2020 at 19:39

2 votes

Pointwise convergence of an increasing sequence of step functions to a measurable function.

answered Apr 29, 2018 at 14:38

2 votes

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Applying the Uniform Boundedness Principle to $\ell ^p$ space

answered May 15, 2018 at 15:15

2 votes

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A sufficient condition for minimality in a Topological Dynamic System

answered Jan 2, 2019 at 19:29

2 votes

Definition of $L^p$ space and almost everywhere defined functions

answered Nov 9, 2019 at 15:36

2 votes

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Division of an irreducible element in a PID

answered Apr 10, 2018 at 12:22

2 votes

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Proving convergence of sequence of functions of sequence

answered Apr 6, 2018 at 18:09

2 votes

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Derivatives and Lebesgue measure.

answered Apr 7, 2018 at 18:38

2 votes

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Kolmogorov 0-1 law with almost sure convergence

answered Mar 17, 2018 at 0:57

Stack Exchange Network

104 Answers

Can we replace finite with countably infinite sequences in the definition of absolute continuous functions?

A simple ring which is not semisimple

Operator norm of integral operator operator, bound from below

To prove it is a Schauder basis?

Banach subspace of Banach space

Any uncountable subset $S$ of $\mathbb{C}$ must have a limit point .

The volume of a solid bounded by two cylinders and two cones.

Subsequence construction for lebesgue inequality

Is this space normed or not?

Limit of operator norm

prove the recurrence sequence is convergent

Uniform convergence of a sequence of functions on real line.

Prove this integration by parts formula

Is the limit of a sequence of continuous linear operators in the weak operator topology again a continuous linear operator?

Weakly convergent nets and compact operators

The James Space

Let $X$ be a normed space and $M$ a finite dimension subspace, $M\neq X$. Prove that $\exists x\in X$ such that $||x||=d(x,M)=1$. And prove...

Bolzano-Weierstrass on $\mathbb{R}^n$ with different Norms

Prove that $C([0,1]),||.||)$ with $||x||= \text{sup}_{t \in [0,1]}|tx(t)|$ is not complete using equivalence of norms

Convergent sequence in Range has convergent premimage for a surjective bounded operator

If $f$ is bounded then convolution $f*g$ is continuous

how to solve Lazy janitor problem

Pointwise convergence of an increasing sequence of step functions to a measurable function.

Applying the Uniform Boundedness Principle to $\ell ^p$ space

A sufficient condition for minimality in a Topological Dynamic System

Definition of $L^p$ space and almost everywhere defined functions

Division of an irreducible element in a PID

Proving convergence of sequence of functions of sequence

Derivatives and Lebesgue measure.

Kolmogorov 0-1 law with almost sure convergence