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04/22/2021
The chromatic number of signed graphs with bounded maximum average degree
A signed graph is a simple graph with two types of edges: positive and n...
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09/11/2020
The chromatic number of 2-edge-colored and signed graphs of bounded maximum degree
A 2-edge-colored graph or a signed graph is a simple graph with two type...
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08/30/2019
Homothetic triangle representations of planar graphs
We prove that every planar graph is the intersection graph of homothetic...
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05/29/2019