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math.CO2016
The crossing number of the cone of a graph
Carlos A. Alfaro, Alan Arroyo, Marek Derunár +1
Motivated by a problem asked by Richter and by the long standing Harary-Hill conjecture, we study the relation between the crossing number of a graph and the crossing number of…
math.CO2016
Drawings of Kn with the same rotation scheme are the same up to Reidemeister moves. Gioan's Theorem
Alan Arroyo, Dan McQuillan, R. Bruce Richter +1
A {\em good drawing\/} of is a drawing of the complete graph with vertices in the sphere such that: no two edges with a common end cross; no two edges cross more than onc…