User Hans-Peter Stricker

49 votes

6 answers

6k views

What is Yoneda's Lemma a generalization of?

asked Jan 21, 2010 at 7:48

43 votes

5 answers

9k views

Origins of names of algebraic structures

asked Aug 11, 2010 at 22:30

39 votes

7 answers

8k views

Spectral graph theory: Interpretability of eigenvalues and -vectors

asked May 17, 2010 at 8:09

33 votes

3 answers

6k views

Bringing Number and Graph Theory Together: A Conjecture on Prime Numbers

asked Mar 23, 2010 at 0:50

29 votes

2 answers

2k views

Why did Dedekind claim that $\sqrt{2}\cdot\sqrt{3}=\sqrt{6}$ hadn't been proved before?

asked Sep 21, 2018 at 23:45

23 votes

7 answers

2k views

Supervenience in mathematics

asked Jan 6, 2011 at 11:32

21 votes

3 answers

12k views

Quantum mathematics?

asked Mar 25, 2011 at 17:54

21 votes

4 answers

3k views

Can you determine whether a graph is the 1-skeleton of a polytope?

asked Dec 18, 2009 at 9:57

20 votes

13 answers

7k views

Longest coinciding pair of integer sequences known

asked Jan 14, 2011 at 18:37

19 votes

3 answers

6k views

Kuratowski's definition of ordered pairs

asked Apr 23, 2011 at 23:24

18 votes

7 answers

4k views

Simple show cases for the Yoneda lemma

asked Jan 15, 2010 at 8:05

18 votes

5 answers

4k views

Category theory and model theory as "natural" counterparts

asked Jan 29, 2010 at 8:52

17 votes

3 answers

977 views

Primacy of arcs/arrows over vertices/objects

asked Jan 26, 2010 at 9:03

17 votes

7 answers

2k views

Non-constructive proofs of decidability?

asked Feb 10, 2010 at 17:12

17 votes

3 answers

2k views

Gödel's Incompleteness Theorem and the complexity of arithmetic

asked Sep 3, 2010 at 10:08

16 votes

8 answers

6k views

Infinite groups which contain all finite groups as subgroups

asked Jun 21, 2010 at 12:44

15 votes

3 answers

2k views

Relativistic Cellular Automata

asked Nov 16, 2010 at 8:42

14 votes

1 answer

513 views

Contexts and notations for composing asymmetric simplices

asked Jan 15, 2015 at 19:02

12 votes

2 answers

3k views

Non-standard models of finite set theory

asked May 4, 2011 at 6:49

12 votes

4 answers

6k views

Undecidability in Conway's Game of Life

asked Nov 8, 2010 at 23:40

12 votes

5 answers

1k views

Predicates of infinite arity

asked Feb 22, 2011 at 17:38

12 votes

2 answers

706 views

Ways to define "definability"

asked Nov 2, 2013 at 17:07

11 votes

6 answers

1k views

Reasons for the importance of planarity and colorability?

asked Jan 10, 2011 at 19:05

11 votes

5 answers

9k views

Models of ZFC Set Theory - Getting Started

asked Feb 1, 2010 at 0:44

11 votes

5 answers

12k views

Number of permutations with a specified number of fixed points

asked Dec 21, 2009 at 16:24

10 votes

5 answers

871 views

What's the name of graphs with each vertex contained in a cycle?

asked Jan 11, 2010 at 0:29

10 votes

1 answer

1k views

Characterizations of Euclidean space

asked Dec 1, 2010 at 8:46

10 votes

1 answer

889 views

Spanning polytopes

asked Jun 9, 2010 at 8:39

10 votes

1 answer

1k views

Reconstruction conjecture: Can other decks do the job?

asked May 19, 2010 at 9:06

9 votes

3 answers

12k views

Number of trees with n nodes and m leaves

asked Apr 16, 2010 at 16:45

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202 Questions

What is Yoneda's Lemma a generalization of?

Origins of names of algebraic structures

Spectral graph theory: Interpretability of eigenvalues and -vectors

Bringing Number and Graph Theory Together: A Conjecture on Prime Numbers

Why did Dedekind claim that $\sqrt{2}\cdot\sqrt{3}=\sqrt{6}$ hadn't been proved before?

Supervenience in mathematics

Quantum mathematics?

Can you determine whether a graph is the 1-skeleton of a polytope?

Longest coinciding pair of integer sequences known

Kuratowski's definition of ordered pairs

Simple show cases for the Yoneda lemma

Category theory and model theory as "natural" counterparts

Primacy of arcs/arrows over vertices/objects

Non-constructive proofs of decidability?

Gödel's Incompleteness Theorem and the complexity of arithmetic

Infinite groups which contain all finite groups as subgroups

Relativistic Cellular Automata

Contexts and notations for composing asymmetric simplices

Non-standard models of finite set theory

Undecidability in Conway's Game of Life

Predicates of infinite arity

Ways to define "definability"

Reasons for the importance of planarity and colorability?

Models of ZFC Set Theory - Getting Started

Number of permutations with a specified number of fixed points

What's the name of graphs with each vertex contained in a cycle?

Characterizations of Euclidean space

Spanning polytopes

Reconstruction conjecture: Can other decks do the job?

Number of trees with n nodes and m leaves