Tomaž Pisanski

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Name	Tomaž Pisanski
Member for	3 years
Seen	Oct 18 at 16:36
Website	ijp.si
Location	Ljubljana, Slovenia
Age	64

I am a professor at the University of Ljubljana, Slovenia

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The middle eigenvalues of an undirected graph

graph-theory linear-algebra

aug 17 10 at 13:26 Jacques Carette 6,797●1●14●36

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Criteria for accepting an invitation to become an editor of a scientific journal

journals peer-review

mar 8 10 at 19:37 Tomaž Pisanski 639●6●17

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Is discrete mathematics mainstream?

soft-question publishing journals

apr 18 10 at 14:43 Bethnim 1●1

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543

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Drawing 3-configurations of points and lines with straight lines

combinatorial-geometry graph-theory computational-complexity tag-removed

jul 7 10 at 2:09 Jose Brox 975●1●12●22

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answer

329

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A graph on irrationals where p is adjacent to q if p^q or q^p is rational.

graph-theory

apr 6 10 at 12:50 François G. Dorais♦ 23.2k●2●52●116

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answer

554

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Finding a cycle of fixed length in a bipartite graph

graph-theory co.combinatorics algorithms computational-complexity

mar 7 10 at 10:46 Tomaž Pisanski 639●6●17

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answers

704

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Is there a bipartite analog of graph theory?

graph-theory topological-graph-theory soft-question big-list

oct 26 10 at 0:42 Timothy Chow 15.2k●1●70●139

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Are there any important mathematical concepts without discrete analog?

co.combinatorics soft-question metamathematics

apr 19 10 at 16:28 Bethnim 1●1

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244

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Drawing a combinatorial 3-configuration of points and lines with pseudolines

combinatorial-geometry graph-theory computational-complexity tag-removed

jul 7 10 at 2:07 Jose Brox 975●1●12●22

Answers

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Fundamental Examples

Checking if two graphs have the same universal cover

Looking for cubic, bipartite graphs with girth at least six and no cycles of length 8.

What should be offered in undergraduate mathematics that’s currently not (or isn’t usually)?

Representing repeated structure in graphs

Criteria for accepting an invitation to become an editor of a scientific journal

Strings and “co-subsequences”

Generalizations of Planar Graphs

Good books on problem solving / math olympiad

Why is edge-coloring less interesting than vertex-coloring?

What programming languages do mathematicians use?

Does a Cayley graph on a minimal symmetric set of generators determine a finite group up to isomorphism?

Properties of Graphs with an eigenvalue of -1 (adjacency matrix)?

Are combinatorial configurations whose Levi graphs may be represented as covering graphs over voltage graphs realizable with pseudolines?

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Questions

The middle eigenvalues of an undirected graph

Criteria for accepting an invitation to become an editor of a scientific journal

Is discrete mathematics mainstream?

Drawing 3-configurations of points and lines with straight lines

A graph on irrationals where p is adjacent to q if p^q or q^p is rational.

Finding a cycle of fixed length in a bipartite graph

Is there a bipartite analog of graph theory?

Are there any important mathematical concepts without discrete analog?

Drawing a combinatorial 3-configuration of points and lines with pseudolines

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