If true, the following conjecture of Thomassen [Th81] is a planarity criterion for a special class of graphs that involves only K 5. Recall that a planar graph on n vertices contains at most 3n-6 ...

PENNSYLVANIA, USA — One Talkback caller questions at what temperature does it actually feel cold? But first, we begin with calls about inflation and rising prices.

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Abstract: Graph-structured combinatorial problems in complex networks are prevalent in many domains, and are computationally demanding due to their complexity and non-linear nature. Traditional ...

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graph-enumeration is a library for the exhaustive generation of unique, undirected graphs with colored nodes. It generates all non-isomorphic connected graphs definable over a specific multiset of ...

A breakthrough deal to attempt to limit global temperature rises was agreed at a conference of world nations in December 2015. These charts from the time show how and why the Earth’s climate is ...