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Results tagged with graph-theory
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user 38532
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.
2
votes
1
answer
254
views
Is the logic of directed graphs generated by a finite set of formulae?
We consider the logic of reflexive directed graphs, i.e. the set
${\bf L}_1$ of those propositional formulae $\varphi$ in the variables $p_i$, which are valid in exactly these graphs.
It is a proper …
- 567
3
votes
0
answers
198
views
Is the class of Heyting algebras originating from directed graphs a variety?
The category RefGph of reflexive directed graphs
is the functor category $\hat{∆}_1=\mbox{Fun}(∆^◦_1,$Set), where $∆_1$ is
the simplex category truncated at level 1.
Hence the poset Sub(X) of subob …
- 567
6
votes
2
answers
472
views
Heyting algebras originating from directed graphs
The category RefGph of reflexive directed graphs is the functor
category $\hat{∆}_1=\mbox{Fun}(∆^◦_1,$Set), where $∆_1$ is
the simplex category truncated at level 1.
Hence the poset Sub(X) of subob …
- 567