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比利时vs摩洛哥足彩
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比利时vs摩洛哥足彩
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university of california san diego
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food for thought
andy wilson
ucsd
schubert calculus
abstract:
``schubert calculus'' is the (somewhat misleading) name given to the classical branch of enumerative geometry which counts intersections of certain simple varieties like points, lines, and planes. rather than actually doing any geometry, we'll find these intersection numbers with a combinatorial rule known as the littlewood-richardson rule. in particular, we'll show why the problem of counting the number of lines in $\mathbb{c}^3$ that intersect four generic lines is now considered to be ``just combinatorics.''
december 5, 2013
12:00 pm
ap&m 5402
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