| | |
| | |
Stat |
Members: 3645 Articles: 2'506'133 Articles rated: 2609
27 April 2024 |
|
| | | |
|
Article overview
| |
|
Quantum cohomology of G/P and homology of affine Grassmannian | Thomas Lam
; Mark Shimozono
; | Date: |
10 May 2007 | Subject: | Algebraic Geometry (math.AG); Combinatorics (math.CO) | Abstract: | Let G be a simple and simply-connected complex algebraic group, P subset G a
parabolic subgroup. We prove an unpublished result of D. Peterson which states
that the quantum cohomology QH^*(G/P) of a flag variety is, up to localization,
a quotient of the homology H_*(Gr_G) of the affine Grassmannian Gr_G of G. As
a consequence, all three-point genus zero Gromov-Witten invariants of $G/P$ are
identified with homology Schubert structure constants of H_*(Gr_G),
establishing the equivalence of the quantum and homology affine Schubert
calculi.
For the case G = B, we use the Mihalcea’s equivariant quantum Chevalley
formula for QH^*(G/B), together with relationships between the quantum Bruhat
graph of Brenti, Fomin and Postnikov and the Bruhat order on the affine Weyl
group. As byproducts we obtain formulae for affine Schubert homology classes in
terms of quantum Schubert polynomials. We give some applications in quantum
cohomology.
Our main results extend to the torus-equivariant setting. | Source: | arXiv, arxiv.0705.1386 | Services: | Forum | Review | PDF | Favorites |
|
|
No review found.
Did you like this article?
Note: answers to reviews or questions about the article must be posted in the forum section.
Authors are not allowed to review their own article. They can use the forum section.
browser Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)
|
| |
|
|
|
| News, job offers and information for researchers and scientists:
| |