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Questions related to the (computational) complexity of solving problems

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In "Computers and Intractability A Guide to the Theory of NP-Completeness" textbook pp 236, "Sequencing to minimize tardy tasks" is NP-complete. To be specific the problem is as follows: For each ta …
asked Jul 6 '12 by user1403806
5
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1answer
Given Graphs $G=(V_1,E_1)$ and $H=(V_2,E_2)$. Can a graph isomorphic to $H$ be obtained from $G$ by a sequence of edge contractions ? We know this problem is NP-complete. What about if only a subset o …
asked Jul 6 '12 by user1403806