User Jochen Glueck

36 votes

3 answers

3k views

What do we learn from the Wronskian in the theory of linear ODEs?

asked May 27, 2020 at 11:51

26 votes

2 answers

1k views

Symmetric strengthening of the Cauchy-Schwarz inequality

asked Jun 3, 2018 at 7:51

19 votes

1 answer

1k views

Suprema of directed sets

asked Dec 3, 2020 at 2:03

14 votes

1 answer

694 views

Criterion for a Banach algebra to be finite dimensional

asked Aug 30, 2018 at 17:07

11 votes

1 answer

691 views

Reference request: Fourier transform on the multiplicative group of real numbers

asked Mar 19, 2018 at 17:30

11 votes

2 answers

504 views

On dense embedding of Banach spaces

asked Apr 2, 2020 at 12:49

9 votes

1 answer

513 views

Regular $p$-norm of a matrix

asked Feb 17, 2018 at 1:18

8 votes

3 answers

690 views

Commutant of the conjugations by unitary matrices

asked Nov 30, 2019 at 9:58

8 votes

3 answers

663 views

Representation theorem for matrices (reference request)

asked Feb 9, 2020 at 21:50

8 votes

1 answer

389 views

Order bounded version of monotone complete $C^*$-algebras

asked Nov 10, 2023 at 21:55

7 votes

0 answers

195 views

Hölder continuity of spectrum of matrices

asked Nov 3, 2022 at 20:09

7 votes

2 answers

464 views

Representing an $L^2$-functional by a non-$L^2$-function on a dense subspace

asked Nov 17, 2022 at 19:49

6 votes

3 answers

681 views

Reference request: Long-term behaviour of the heat equation for bounded initial data

asked Oct 3, 2019 at 12:32

5 votes

0 answers

109 views

Reference request: a survey of (linear) Krein-Rutman theory

asked Mar 25, 2020 at 13:37

5 votes

1 answer

506 views

Weak compactness of order intervals in $L^1$

asked Feb 14, 2018 at 10:47

5 votes

1 answer

201 views

Characterization of operator ranges

asked May 21, 2019 at 20:03

5 votes

1 answer

188 views

Large ideally convex sets

asked Mar 16, 2023 at 14:42

4 votes

1 answer

279 views

Reference request: Baire's theorem for operator ranges

asked May 20, 2021 at 16:23

4 votes

1 answer

476 views

Bicommutant theorem for commutative operator algebras

asked Feb 19, 2019 at 18:50

4 votes

1 answer

220 views

Non-isolated ground state of a Schrödinger operator

asked Feb 25, 2019 at 22:49

4 votes

1 answer

151 views

Mapping inclusion theorem for the numerical range

asked Mar 23, 2019 at 9:29

3 votes

2 answers

485 views

Relative compactness in topological spaces (reference request)

asked Dec 17, 2020 at 12:55

3 votes

0 answers

65 views

Uniform stability of linear operators - reference request

asked Oct 12, 2020 at 12:11

1 vote

1 answer

89 views

Representing an $L^2$-functional by a non-$L^2$-function on a dense subspace - Part II

asked Nov 18, 2022 at 14:49

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24 Questions

What do we learn from the Wronskian in the theory of linear ODEs?

Symmetric strengthening of the Cauchy-Schwarz inequality

Suprema of directed sets

Criterion for a Banach algebra to be finite dimensional

Reference request: Fourier transform on the multiplicative group of real numbers

On dense embedding of Banach spaces

Regular $p$-norm of a matrix

Commutant of the conjugations by unitary matrices

Representation theorem for matrices (reference request)

Order bounded version of monotone complete $C^*$-algebras

Hölder continuity of spectrum of matrices

Representing an $L^2$-functional by a non-$L^2$-function on a dense subspace

Reference request: Long-term behaviour of the heat equation for bounded initial data

Reference request: a survey of (linear) Krein-Rutman theory

Weak compactness of order intervals in $L^1$

Characterization of operator ranges

Large ideally convex sets

Reference request: Baire's theorem for operator ranges

Bicommutant theorem for commutative operator algebras

Non-isolated ground state of a Schrödinger operator

Mapping inclusion theorem for the numerical range

Relative compactness in topological spaces (reference request)

Uniform stability of linear operators - reference request

Representing an $L^2$-functional by a non-$L^2$-function on a dense subspace - Part II