Skip to main content
Search type Search syntax
Tags [tag]
Exact "words here"
Author user:1234
user:me (yours)
Score score:3 (3+)
score:0 (none)
Answers answers:3 (3+)
answers:0 (none)
isaccepted:yes
hasaccepted:no
inquestion:1234
Views views:250
Code code:"if (foo != bar)"
Sections title:apples
body:"apples oranges"
URL url:"*.example.com"
Saves in:saves
Status closed:yes
duplicate:no
migrated:no
wiki:no
Types is:question
is:answer
Exclude -[tag]
-apples
For more details on advanced search visit our help page
Results tagged with
Search options not deleted user 12858

Questions about the branch of combinatorics called graph theory (not to be used for questions concerning the graph of a function). This tag can be further specialized via using it in combination with more specialized tags such as extremal-graph-theory, spectral-graph-theory, algebraic-graph-theory, topological-graph-theory, random-graphs, graph-colorings and several others.

4 votes
Accepted

article by Jacques Tits about automorphism group of a locally finite tree

This is true if the action of the automorphism group is edge-transitive (so in particular the tree has to be biregular). This is precisely the statement of Lemma 2.6(vii and viii) of our paper "Simple …
Tom De Medts's user avatar
  • 6,614
4 votes
Accepted

Is a graph with edges between edges and nodes still a graph?

I'm not aware of a name for such an object, but it can easily be modeled by a single vertex-colored directed graph $\Gamma$: As vertex set of $\Gamma$, take the union of the vertices and edges of you …
Tom De Medts's user avatar
  • 6,614