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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.

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pseudo-Hadamard matrix

What can one say about the matrices M with the following properties: 1) the rows and the columns are indexed by the elements of a finite field with an even number q of elements; 2) All the matrix entr …
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