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Graph theory is the study of graphs, mathematical structures used to model pairwise relations between objects.

2 votes
Accepted

Graph Isomorphism: Polynomial time reduction from GI for disconnected graphs to GI for conne...

What about the following simple reduction: given graphs $G$ and $H$, let $G' = G * g$ and $H' = H * h$, where $X * x$ is obtained from $X$ by adding a new vertex $x$ and all edges between $x$ and al …
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5 votes

Graphs in which every minimal separator is an independent set

There are two new papers on graphs without cycle having exactly one chord. Both mainly deal with coloring these graphs: http://arxiv.org/abs/1309.2749 and http://arxiv.org/abs/1311.1928. The later …
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21 votes
3 answers
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Graphs in which every minimal separator is an independent set

Background: Let $u, v$ be two vertices of an undirected graph $G=(V,E)$. A vertex set $S\subseteq V$ is a $u,v$-separator if $u$ and $v$ belong to different connected components of $G-S$. If no proper …
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