Authors: Roberto Muñoz Gianluca Occhetta Luis E Solá Conde Kiwamu Watanabe
Publish Date: 2014/08/13
Volume: 361, Issue: 3-4, Pages: 583-609
Abstract
A Fano manifold X with nef tangent bundle is of FlagType if it has the same kind of elementary contractions as a complete flag manifold In this paper we present a method to associate a Dynkin diagram mathcal DX with any such X based on the numerical properties of its contractions We then show that mathcal DX is the Dynkin diagram of a semisimple Lie group As an application we prove that Campana–Peternell conjecture holds when X is a FlagType manifold whose Dynkin diagram is A n ie we show that X is the variety of complete flags of linear subspaces in mathbb PnR Muñoz and L E Solá Conde were partially supported by the Spanish government project MTM200906964 L E Solá Conde was supported by National Researcher Program 20100020413 of NRF L E Solá Conde and K Watanabe were partially supported by the Research in Pairs Program of CIRM K Watanabe was partially supported by JSPS KAKENHI Grant Number 26800002This project was conceived when the third and fourth author enjoyed a grant of the “Research in pairs” program of the Fondazione Bruno Kessler at the Centro Internazionale per la Ricerca Matematica Trento We would like to express our gratitude to this institution for its support and hospitality We would also like to thank J Wiśniewski for his interest in our project and his useful comments
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