Separation Coordinates, Moduli Spaces and Stasheff Polytopes
Separation Coordinates, Moduli Spaces and Stasheff Polytopes
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分离坐标、模空间和 Stasheff 多面体
DOI:
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发表时间:
2013
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通讯作者:
A. Veselov
中科院分区:
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作者:
K. Schobel;A. Veselov
We show that the orthogonal separation coordinates on the sphere Sn are naturally parametrised by the real version of the Deligne–Mumford–Knudsen moduli space $${ar{M}_{0,n+2}({mathbb{R}})}$$M¯0,n+2(R) of stable curves of genus zero with n + 2 marked points. We use the combinatorics of Stasheff polytopes tessellating $${ar{M}_{0,n+2}({mathbb{R}})}$$M¯0,n+2(R) to classify the different canonical forms of separation coordinates and deduce an explicit construction of separation coordinates, as well as of Stäckel systems from the mosaic operad structure on $${ar{M}_{0,n+2}({mathbb{R}})}$$M¯0,n+2(R).