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Enumerative combinatorics, graph theory, order theory, posets, matroids, designs and other discrete structures. It also includes algebraic, analytic and probabilistic combinatorics.
19
votes
Spencer's "six standard deviations" theorem - better constants?
Having done the original result it is exciting to see work on the constant. My 5.32 was certainly not meant to be best possible. For the lower bounds, using
Hadamard Matrices (with coefficients +1,- …