Geometric Robinson-Schensted-Knuth correspondence
- Gleb Koshevoy (Russian Academy of Science, Moscow)
Abstract
We define a geometric RSK correspondence for any semisimple group and any reduced decompositon of element of its Weyl group. This correspondence is a biration map of tori of dimension equal to the length of a reduced decomposition.
For the longest element of the Weyl group, the tropicalization of this map turns out to be the isomorphism between the Lusztig crystal on the canonical basis and the Kashiwara crystal on the dual canonical basis. The geometric corespondence provide us with a transformation of the corresponding superpotentials for geometric crystals.
For the case