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
3 answers
468 views

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

1 vote
1 answer
243 views

Understanding a group of transformations of the plane $\mathbb{Z} \times \mathbb{Z}$

3 votes
0 answers
232 views

Visualization of hidden structures in numbers

8 votes
2 answers
1k views

The Stacks project

19 votes
3 answers
6k views

Kuratowski's definition of ordered pairs

8 votes
7 answers
2k views

Visualizing polyhedra from their 1-skeletons

1 vote
2 answers
203 views

Symmetry preserving graph products

5 votes
2 answers
470 views

Another graph characteristic

5 votes
1 answer
271 views

Approximating Jordan curves

1 vote
0 answers
261 views

Characterization of non-Zeno functions $f:\mathbb{R}\rightarrow \{0,1\}$

4 votes
1 answer
487 views

Generalized graph products in view of vertex-transitive graphs

3 votes
0 answers
204 views

Classes which interpret any structure

2 votes
1 answer
239 views

Edge-objectified graphs

0 votes
0 answers
92 views

Name and theory of multi-valued functions $F:\mathbb{N}^k \rightarrow \mathbb{N}^l$

1 vote
0 answers
79 views

Another characteristic of subsets of (finite) power sets

0 votes
0 answers
83 views

Generalized concept of subgraph (input/output graphs)

5 votes
1 answer
1k views

Commutative diagrams for groups

17 votes
7 answers
2k views

Non-constructive proofs of decidability?

4 votes
1 answer
727 views

In search for isotropic graphs: Straight lines and parallels

7 votes
4 answers
3k views

The ABC of categories: ABstract vs Concrete

2 votes
1 answer
424 views

Ways to look at a polyhedral graph

6 votes
2 answers
809 views

Human brains considered as directed graphs

4 votes
1 answer
139 views

Fuzzy layers in graphs and neural networks

2 votes
0 answers
124 views

Unveiling hidden structures

4 votes
1 answer
418 views

Giving the same concept different names in the same paper

6 votes
5 answers
2k views

Set theories that do require the existence of urelements?

0 votes
1 answer
457 views

Endofunctors of graph categories

49 votes
6 answers
6k views

What is Yoneda's Lemma a generalization of?

14 votes
1 answer
513 views

Contexts and notations for composing asymmetric simplices

-1 votes
1 answer
880 views

Conjugate vertices and distinguishing properties

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