A unified approach on Springer fibers in the hook, two-row and two-column cases

Details A unified approach on Springer fibers in the hook, two-row and two-column cases A unified approach on Springer fibers in the hook, two-row and two-column cases

2008-03-14

arxiv.org/abs/0803.2183v2

Mathematics

Algebraic Geometry

42 pages

Scientific paper

10.1007/s00031-010-9096-3

We consider the Springer fiber over a nilpotent endomorphism. Fix a Jordan basis and consider the standard torus relative to this. We deal with the problem to describe the flags fixed by the torus which belong to a given component of the Springer fiber. We solve the problem in the hook, two-row and two-column cases. We provide two main characterizations which are common to the three cases, and which involve dominance relations between Young diagrams and combinatorial algorithms. Then, for these three cases, we deduce topological properties of the components and their intersections.

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