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Let $M$ be set of intervals $[a,b]$, $a,b \in \mathbb{N}$.

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#combinatorics #induction
565
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Killing Flies with a Checkerboard Flyswatter

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#combinatorics #contest-math #pigeonhole-principle
64
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Why is this line of reasoning not correct?

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#probability #combinatorics #card-games
365
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LP relaxation of the symmetric TSP problem integrality for n=5

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#combinatorics #linear-programming #integer-programming #polytopes #relaxations
181
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How to prove that lattice width is attained?

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#combinatorics #discrete-mathematics #optimization #integer-programming #integer-lattices
84
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Counting small subgraphs

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#combinatorics #random-graphs
57
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Counting the equal-differences of an permutation

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#combinatorics #permutations #inclusion-exclusion
909
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Probability that connecting two vertices in a dodecahedron will result in a segment inside the dodecahedron

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#probability #combinatorics #geometry
87
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Proving maxima for a combinatorial function

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#combinatorics #functions #maxima-minima
225
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counting with constraints

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#combinatorics #permutations #combinations
93
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summing terms to the cardinality all possible subsets of a given set

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#combinatorics #summation #cardinals
52
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Will ${n \choose r} = {m \choose k}$ for $n \not=m$?

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#combinatorics #algebra-precalculus #permutations #combinations
221
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Find number of solutions to special "Lights Out!" puzzle scenarios

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#combinatorics #matrices #discrete-mathematics #combinatorial-game-theory
153
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Probability: problem with 300 balls

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#probability #combinatorics
68
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some elementary sources about distributive lattices, modular lattices, planar lattices, Hibi rings and Grobner basis

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#combinatorics #reference-request #commutative-algebra

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