Browsing FACULTAD DE CIENCIAS by Author "Leanos, J"

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Simple Euclidean arrangements with no (>= 5)-gons

Leanos, J; Lomeli, M; Merino, C; Salazar, G; Urrutia, J (2007)

It is shown that if a simple Euclidean arrangement of n pseudolines has no (>= 5)-gons, then it has exactly n - 2 triangles and (n - 2)(n - 3)/2 quadrilaterals. We also describe how to construct all such arrangements, and ...
Spanning trees of multicoloured point sets with few intersections

Leanos, J; Merino, C; Salazar, G; Urrutia, J (2005)

Kano et al. proved that if P-0, P-1,..., Pk-1 are pairwise disjoint collections of points in general position, then there exist spanning trees T-0, T-1, (...),T (k-1), of P-0, P-1,...,Pk-1, respectively, such that the edges ...

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