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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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Given a real $x>1$, construct an aperiodic substitution sequence whose complexity functions ...

The Fibonacci word is a binary sequence defined as follows. We use a substitution rule $0\to 01$, $1\to 0$. Then, starting with the binary string $0$, apply the substitution rules successively. So we …
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