نتایج جستجو برای: colored

تعداد نتایج: 17673  

2009
W. Fernandez de La Vega Y. Manoussakis C. Martinhon R. Muthu R. Saad

Abstract We consider maximum properly edge-colored trees in edge-colored graphs Gc. We also consider the problem where, given a vertex r, determine whether the graph has a spanning tree rooted at r, such that all root-to-leaf paths are properly colored. We consider these problems from graphtheoretic as well as algorithmic viewpoints. We prove their optimization versions to be NP-hard in general...

2007
E. Di Giacomo G. Liotta Melanie Badent Emilio Di Giacomo Giuseppe Liotta

Let G be a planar graph with n vertices whose vertex set is partitioned into subsets V0, . . . , Vk−1 for some positive integer 1 ≤ k ≤ n and let S be a set of n distinct points in the plane partitioned into subsets S0, . . . , Sk−1 with |Vi| = |Si| (0 ≤ i ≤ k − 1). This paper studies the problem of computing a crossing-free drawing of G such that each vertex of Vi is mapped to a distinct point...

Journal: :Discrete Applied Mathematics 2012

Journal: :Journal of the Surface Finishing Society of Japan 1989

Journal: :Scientific American 1893

Journal: :The Journal of Abnormal Psychology 1908

Journal: :Physical Sciences Reviews 2021

Journal: :Modern Physics Letters B 1993

Journal: :The Journal of the Society of Chemical Industry, Japan 1968

Journal: :Proceedings of the National Academy of Sciences 1978

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