A Vanishing Result for Toric Varieties Associated with Root Systems

Details A Vanishing Result for Toric Varieties Associated with Root Systems A Vanishing Result for Toric Varieties Associated with Root Systems

2007-10-30

arxiv.org/abs/0710.5751v1

Mathematics

Representation Theory

Scientific paper

Consider a root system $R$ and the corresponding toric variety $V_R$ whose fan is the Weyl fan and whose lattice of characters is given by the root lattice for $R$. We prove the vanishing of the higher cohomology groups for certain line bundles on $V_R$ by proving a purely combinatorial result for root systems. These results are related to a converse to Mazur's Inequality for (simply-connected) split reductive groups.

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