Edge-contraction problems
نویسندگان
چکیده
منابع مشابه
Parameterized Complexity of Two Edge Contraction Problems with Degree Constraints
Motivated by recent results of Mathieson and Szeider (J. Comput. Syst. Sci. 78(1): 179–191, 2012), we study two graph modification problems where the goal is to obtain a graph whose vertices satisfy certain degree constraints. The Regular Contraction problem takes as input a graph G and two integers d and k, and the task is to decide whether G can be modified into a d-regular graph using at mos...
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We study edge contractions in simplicial complexes and local conditions under which they preserve the topological type. The conditions are based on a generalized notion of boundary, which lends itself to de ning a nested hierarchy of triangulable spaces measuring the distance to being a manifold.
متن کاملParallel Ordering Using Edge Contraction
Computing a ll-reducing ordering of a sparse matrix is a central problem in the solution of sparse linear systems using direct methods. In recent years, there has been signiicant research in developing a sparse direct solver suitable for message-passing multiprocessors. However, computing the ordering step in parallel remains a challenge and there are very few methods available. This paper desc...
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We prove that edge contractions do not preserve the property that a set of graphs has bounded clique-width.
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The clique graph K(G) of a graph G is the intersection graph of all its (maximal) cliques. We explore the effect of operations like edge contraction, edge removal and others on the dynamical behaviour of a graph under the iteration of the clique operator K. As a consequence of this study, we can now prove the clique divergence of graphs for which no previously known technique would yield the re...
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ژورنال
عنوان ژورنال: Journal of Computer and System Sciences
سال: 1983
ISSN: 0022-0000
DOI: 10.1016/0022-0000(83)90012-0