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Number of Triangulations of a M\"obius Strip

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arxiv 2009.05785 v1 pith:KOTTD6SM submitted 2020-09-12 math.CO

Number of Triangulations of a M\"obius Strip

classification math.CO
keywords stripobiusnumberpointschosenedgetriangulationsalgebra
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Consider a M\"obius strip with $n$ chosen points on its edge. A triangulation is a maximal collection of arcs among these points and cuts the strip into triangles. In this paper, we proved the number of all triangulations that one can obtain from a M\"obius strip with $n$ chosen points on its edge is given by $4^{n-1}+\binom{2n-2}{n-1}$, then we made the connection with the number of clusters in the quasi-cluster algebra arising from the M\"obius strip.

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  1. Curve integral formula for the M\"obius strip

    hep-th 2026-03 conditional novelty 6.0

    A global Schwinger integral is constructed for Möbius-strip amplitudes and verified against the tropical limit of the type-I superstring Möbius amplitude.