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Questions
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Acyclic orientations of complete graphs in terms of Stirling numbers?

mar 30 at 3:56 Andres Caicedo 14.4k●1●42●79

 
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When do the invariant factors of a direct sum of matrices correspond to those of its summands?

apr 27 12 at 11:19 Denis Serre 18.7k●1●31●93

 
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Number of spanning subgraphs of $K_n$ with given number of edges and connected components

jun 7 at 19:44 Gwyn Whieldon 831●3●12

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Non-alternating chromatic factors?

feb 2 11 at 13:22 Adam 967●5●11

 
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Splitting of prime ideals in non-Dedekind domains?

sep 8 10 at 16:58 Adam 967●5●11

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Morphisms between representations

oct 22 10 at 20:00 Adam 967●5●11

 
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Which numbers appear as discriminants of cubics?

feb 18 11 at 14:35 Franz Lemmermeyer 17.2k●1●38●101

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