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Questions
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What properties does generalized Delaunay triangulation have?

feb 21 at 16:25 Joseph O'Rourke 43.3k●1●49●214

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What are conjectures that are true for primes but then turned out to be false for some composite number?

jan 4 at 17:20 pollington 11●1

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Does every bipartite graph with 512 edges have an induced subgraph with 256 edges?

nov 15 at 0:23 Gerhard Paseman 764●4●4

 
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How hard is it to solve SAT if the promise is that it has an odd number of solutions?

aug 30 at 8:39 Vladimír Čunát 1

 
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Is this stronger Knaster-Kuratowski-Mazurkiewicz Lemma true?

aug 26 at 7:10 domotorp 4,068●7●25

 
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Can a simple curve intersect every subspace of dim 2 and avoid the origin?

aug 25 at 13:17 Anton Petrunin 16.5k●41●110

 
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Can you prove that hypergraphs with n-1 edges are partially 2 colorable?

mar 12 12 at 1:34 Oliver Kullmann 173●4

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Can we color Z^+ with n colors such that a, 2a, …, na all have different colors for all a?

jan 13 12 at 2:16 Andres Caicedo 14.4k●1●42●79

 
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Red-blue alternating Menger’s theorem

oct 11 11 at 19:02 Sergey Norin 2,045●8●11

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Is there a chess position equivalent to the Collatz conjecture?

may 17 11 at 8:55 the cane toad 1

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