Hans-Peter Stricker's user avatar
Hans-Peter Stricker's user avatar
Hans-Peter Stricker's user avatar
Hans-Peter Stricker
  • Member for 14 years, 3 months
  • Last seen this week
  • Germany
5 votes
1 answer
571 views

Expressive power of first-order category theory

5 votes
3 answers
468 views

Counting without one-to-one correspondence? [closed]

5 votes
2 answers
625 views

The slope of $nx\ \%\ m$ [closed]

5 votes
1 answer
460 views

Explaining patterns in modular multiplication graphs

5 votes
2 answers
443 views

Drawing (graphs) by numbers: a minimality question

5 votes
2 answers
570 views

Rado graph containing infinitely many isomorphic subgraphs

5 votes
2 answers
620 views

Can we alter the axioms of Euclidean space to have $\mathbb{Q}^3$ as a unique model?

5 votes
3 answers
2k views

Undecidable graph problems?

5 votes
1 answer
950 views

Can topologies induce a metric? (revised)

5 votes
2 answers
168 views

Abstract characterization of polygonizations

5 votes
1 answer
271 views

Approximating Jordan curves

5 votes
3 answers
678 views

Isometric but differently shaped closed surfaces in $\mathbb{R}^3$

5 votes
3 answers
511 views

Probing a manifold with closed curves

5 votes
2 answers
485 views

Mathematical analysis of Lewisian concepts, esp. natural properties

5 votes
5 answers
1k views

Concrete models of abstract structures

5 votes
1 answer
1k views

Commutative diagrams for groups

4 votes
2 answers
576 views

Formulaic definitions

4 votes
1 answer
188 views

Some questions about ideal knots

4 votes
2 answers
205 views

Jordan-like cycles in graphs

4 votes
1 answer
629 views

Combinatorial geodesics

4 votes
1 answer
487 views

Generalized graph products in view of vertex-transitive graphs

4 votes
2 answers
2k views

Regular graph colorings

4 votes
0 answers
412 views

Interpretations as morphisms

4 votes
2 answers
767 views

Number of independent distances between n points in d-dimensional Euclidean space?

4 votes
1 answer
341 views

Can the inner structure of an object be systematically deduced from its position in the category? [closed]

4 votes
3 answers
514 views

Can infinite first-order categories be specified other than as categories of models?

4 votes
2 answers
284 views

Goedelizability and decidability of a property of Peano formulas

4 votes
1 answer
727 views

In search for isotropic graphs: Straight lines and parallels

4 votes
1 answer
1k views

Smallest non-isomorphic strongly regular graphs

4 votes
1 answer
221 views

A distinguishing node property in trees?

1 2
3
4 5
7