User Delio Mugnolo

13 votes

3 answers

3k views

history of calculus of several variables

asked Jan 29, 2014 at 13:32

11 votes

1 answer

548 views

doubly-stochastic isomorphisms of graphs

asked May 9, 2014 at 14:04

10 votes

2 answers

4k views

Direct proof of the separation theorem of Hahn-Banach

asked Jun 22, 2013 at 20:13

9 votes

1 answer

3k views

Hard maths on viXra? [closed]

asked Feb 3, 2016 at 23:08

8 votes

1 answer

250 views

A generalisation of $C_0$-semigroups

asked Dec 14, 2015 at 9:40

8 votes

3 answers

7k views

Spectrum of an adjacency matrix

asked Jan 8, 2014 at 16:09

8 votes

1 answer

750 views

normalized laplacian spectrum of trees

asked Sep 27, 2013 at 23:47

8 votes

0 answers

285 views

Lax pairs in an abstract formalism

asked Dec 18, 2017 at 11:14

7 votes

0 answers

232 views

orthogonal projector onto the set of convex functions

asked Nov 30, 2015 at 12:29

6 votes

1 answer

331 views

Optimal constant in Sobolev embedding

asked Oct 19, 2020 at 21:29

6 votes

4 answers

1k views

Radon-Nikodým property of $\ell^\infty$

asked May 7, 2013 at 17:41

5 votes

1 answer

2k views

Applications of line graphs

asked Mar 7, 2013 at 7:52

5 votes

0 answers

133 views

Series representation for unbounded perturbations of semigroup generators

asked Oct 15, 2013 at 10:53

5 votes

1 answer

854 views

traces of sobolev spaces under additional assumptions

asked Oct 30, 2013 at 11:00

5 votes

1 answer

609 views

projection of sobolev spaces onto cones

asked Mar 19, 2013 at 11:29

5 votes

2 answers

937 views

eigenvalue estimate of the adjacency matrix

asked Oct 9, 2014 at 8:43

5 votes

2 answers

207 views

significance of the Fučík spectrum

asked Nov 5, 2014 at 11:07

5 votes

1 answer

618 views

Boundedness of integral operators on spaces of continuous functions

asked Nov 28, 2019 at 7:31

4 votes

1 answer

253 views

An elementary inequality for graph Laplacians

asked Dec 3, 2017 at 23:32

4 votes

1 answer

725 views

binary intersection property in finite dimension

asked Jul 3, 2013 at 9:21

4 votes

0 answers

279 views

origin of the notion of "network" in graph theory

asked Mar 11, 2013 at 21:50

4 votes

0 answers

284 views

trace-class embeddings

asked Jun 5, 2013 at 20:23

4 votes

1 answer

2k views

Elements of the history of mathematics

asked Jan 22, 2013 at 10:19

4 votes

1 answer

1k views

existence of a minimum for a convex functional on a non-reflexive space

asked Mar 6, 2013 at 6:53

3 votes

1 answer

765 views

on an inequality of Brezis-Lieb

asked Jan 23, 2013 at 18:55

3 votes

1 answer

908 views

numerical range of a column-zero-sum matrix

asked Jul 29, 2013 at 19:33

3 votes

2 answers

407 views

Airy's equation on $\mathbb R_-$

asked Jan 13, 2016 at 16:09

3 votes

2 answers

407 views

A possible norm on a subspace of $C^\infty([0,1])$?

asked May 8, 2016 at 21:43

3 votes

0 answers

83 views

Compact Sobolev embedding with boundary conditions

asked Jun 17, 2021 at 14:51

3 votes

0 answers

78 views

Embedding theorems for Dini continuous functions

asked Nov 20, 2023 at 17:28

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50 Questions

history of calculus of several variables

doubly-stochastic isomorphisms of graphs

Direct proof of the separation theorem of Hahn-Banach

Hard maths on viXra? [closed]

A generalisation of $C_0$-semigroups

Spectrum of an adjacency matrix

normalized laplacian spectrum of trees

Lax pairs in an abstract formalism

orthogonal projector onto the set of convex functions

Optimal constant in Sobolev embedding

Radon-Nikodým property of $\ell^\infty$

Applications of line graphs

Series representation for unbounded perturbations of semigroup generators

traces of sobolev spaces under additional assumptions

projection of sobolev spaces onto cones

eigenvalue estimate of the adjacency matrix

significance of the Fučík spectrum

Boundedness of integral operators on spaces of continuous functions

An elementary inequality for graph Laplacians

binary intersection property in finite dimension

origin of the notion of "network" in graph theory

trace-class embeddings

Elements of the history of mathematics

existence of a minimum for a convex functional on a non-reflexive space

on an inequality of Brezis-Lieb

numerical range of a column-zero-sum matrix

Airy's equation on $\mathbb R_-$

A possible norm on a subspace of $C^\infty([0,1])$?

Compact Sobolev embedding with boundary conditions

Embedding theorems for Dini continuous functions