Real Bott manifolds and acyclic digraphs
classification
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math.CO
keywords
bottmanifoldsrealacycliccharacterizationoperationstermscombinatorial
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Masuda (2008) provided the characterization of real Bott manifolds in terms of three operations on upper triangular matrices. We provide a combinatorial characterization of real Bott manifolds up to diffeomorphism in terms of operations on directed acyclic graphs. Our observation leads to several new invariants of real Bott manifolds.
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