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Questions

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219

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The state of art of the sunflower lemma

co.combinatorics extremal-set-theory extremal-combinatorics

dec 1 at 12:54 WangYao 122●4

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233

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An Pure intriguing counting problem of index sets

co.combinatorics enumeration extremal-combinatorics

aug 11 at 21:59 Michael Hardy 4,558●1●23●48

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Counting Selections of Entries such having an Extremal Permutation of length n^2+1

co.combinatorics permutations enumeration

mar 23 12 at 21:07 WangYao 122●4

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The Problem about 2-coloring finite plane

co.combinatorics graph-colorings ramsey-theory

feb 21 12 at 11:08 Gerry Myerson 15.8k●1●47●87