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Arrhythmia

Stricture

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Molecular Aspects of Membrane Phenomena Hadwiger number of a graph is .-hard on co-bipartite graphs, but can be solved in polynomial time on cographs and on bipartite permutation graphs. We also consider a natural generalization of this problem that asks for the largest integer . such that . has a minor with . vertices and diameter at mo

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deface

Molecular Aspects of Papovaviruseseither common vertices nor adjacent vertices (except perhaps their ends) for .. We present a linear-time algorithm that solves . and finds the corresponding paths (if they exist) on circular-arc graphs. For interval graphs, we exhibit a linear-time algorithm for the generalization of . where the pai

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Psa617

Molecular Aspects of Cancer and its Therapy constant ratio approximation algorithm for this problem can be converted into a PTAS. This last result, combined with the .-hardness of the problem, shows that the problem cannot be approximated within a constant ratio unless ..

1FAWN

Molecular Aspects of Membrane Phenomena also consider a natural generalization of this problem that asks for the largest integer . such that . has a minor with . vertices and diameter at most .. We show that this problem can be solved in polynomial time on AT-free graphs when ., but is .-hard on chordal graphs for every fixed ..

hidebound

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