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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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Placing numbers $1,2,\ldots,n^2$ in a square so that numbers of any two adjacent unit subcub...

It is proved HERE that there is a natural number $N$ such that for any $n > N$ it is possible to place numbers $1,2,\cdots, n^2$ is an $n\times n$ square such that the numbers in any two adjacent squa …
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