26 citations · 161 across the 33 of their papers we have counts for
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math.CO2013★ 26 cited
Edge-signed graphs with smallest eigenvalue greater than -2
Gary Greaves, Jack Koolen, Akihiro Munemasa +2
We give a structural classification of edge-signed graphs with smallest eigenvalue greater than -2. We prove a conjecture of Hoffman about the smallest eigenvalue of the line graph…
math.CO2013★ 2 cited
The double competition multigraph of a digraph
Jeongmi Park, Yoshio Sano
In this article, we introduce the notion of the double competition multigraph of a digraph. We give characterizations of the double competition multigraphs of arbitrary digraphs, l…
math.CO2013★ 2 cited
The niche graphs of interval orders
Jeongmi Park, Yoshio Sano
The niche graph of a digraph is the (simple undirected) graph which has the same vertex set as and has an edge between two distinct vertices and if and only if $N^+…