Reducible M-curves for Le-networks in the totally-nonnegative Grassmannian and KP-II multiline solitons
نویسندگان
چکیده
منابع مشابه
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Postnikov constructed a decomposition of a totally nonnegative Grassmannian (Grkn)≥0 into positroid cells. We provide combinatorial formulas that allow one to decide which cell a given point in (Grkn)≥ belongs to and to determine affine coordinates of the point within this cell. This simplifies Postnikov’s description of the inverse boundary measurement map and generalizes formulas for the top ...
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ژورنال
عنوان ژورنال: Selecta Mathematica
سال: 2019
ISSN: 1022-1824,1420-9020
DOI: 10.1007/s00029-019-0488-5