mhum

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20 Answers

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14	Prove that the problem of rectilinear picture compression is np-complete
14	Positive topological ordering
12	Need an efficient algorithm to visit all nodes of a graph, revisiting edges and nodes is allowed
8	Is counting maximal cliques in an incomparability graph #P-complete?
7	Collatz Conjecture & Grammars / Automata

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1,536 Reputation

+10	Is public-key spread-spectrum communication possible?
+100	Recognizing line graphs of hypergraphs
+10	Sending people to lunch together with minimal repetition
+10	Collatz Conjecture & Grammars / Automata

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0 Questions

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31 Tags

41 ds.algorithms × 6	14 reference-request × 2
35 cc.complexity-theory × 6	14 directed-acyclic-graph
22 partial-order × 2	12 planar-graphs
21 graph-algorithms × 4	11 halting-problem × 2
20 np-hardness × 3	10 graph-theory × 3

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$Mathematics Stack Exchange$	Mathematics	519 rep	26
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	Cross Validated	101 rep	1

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400 Votes Cast

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