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Artículo
Monochromatic geometric k-factors in red-blue sets with white and Steiner points
(2009)
We study the existence of monochromatic planar geometric k-factors on sets of red and blue points. When it is not possible to find a k-factor we make use of auxiliary points: white points, whose position is given as a datum ...
Artículo
Homomorphisms and polynomial invariants of graphs
(Elsevier, 2009)
This paper initiates a general study of the connection between graph homomorphisms and the Tutte polynomial. This connection can be extended to other polynomial invariants of graphs related to the Tutte polynomial such ...