• K-1,K-3-covering red and blue points in the plane 

      Ábrego, Bernardo M.; Fernández Merchant, Silvia; Kano, Mikio; Orden, David; Pérez Lantero, Pablo; Seara Ojea, Carlos; Tejel Altarriba, Francisco Javier (Chapman & Hall/CRC, 2019-01-31)
      Article
      Accés obert
      We say that a finite set of red and blue points in the plane in general position can be K1,3-covered if the set can be partitioned into subsets of size 4, with 3 points of one color and 1 point of the other color, in such ...
    • On the Oß-hull of a planar point set 

      Alegría Galicia, Carlos; Orden, David; Seara Ojea, Carlos; Urrutia Galicia, Jorge (2018-03-01)
      Article
      Accés obert
      We study the Oß-hull of a planar point set, a generalization of the Orthogonal Convex Hull where the coordinate axes form an angle ß. Given a set P of n points in the plane, we show how to maintain the Oß-hull of P while ...