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  • Consider a compact connected simple Lie group G. We study homogeneous Einstein metrics for a class of compact homogeneous spaces, namely generalized flag manifolds G/H with second Betti number b2(G/H)=1. There are 8 infinite families G/H corresponding to a classical simple Lie group G and 25 exceptional flag manifolds, which all have some common geometric features; for example they admit a unique invariant complex structure which gives rise to unique invariant Kähler–Einstein metric. The most typical examples are the compact isotropy irreducible Hermitian symmetric spaces for which the Killing form is the unique homogeneous Einstein metric (which is Kähler). For non-isotropy irreducible spaces the classification of homogeneous Einstein metrics has been recently completed for 24 of the 26 cases. In this paper we construct the Einstein equation for the two unexamined cases, namely the flag manifolds E8/U(1)×SU(4)×SU(5) and E8/U(1)×SU(2)×SU(3)×SU(5).
  • Consider a compact connected simple Lie group G. We study homogeneous Einstein metrics for a class of compact homogeneous spaces, namely generalized flag manifolds G/H with second Betti number b2(G/H)=1. There are 8 infinite families G/H corresponding to a classical simple Lie group G and 25 exceptional flag manifolds, which all have some common geometric features; for example they admit a unique invariant complex structure which gives rise to unique invariant Kähler–Einstein metric. The most typical examples are the compact isotropy irreducible Hermitian symmetric spaces for which the Killing form is the unique homogeneous Einstein metric (which is Kähler). For non-isotropy irreducible spaces the classification of homogeneous Einstein metrics has been recently completed for 24 of the 26 cases. In this paper we construct the Einstein equation for the two unexamined cases, namely the flag manifolds E8/U(1)×SU(4)×SU(5) and E8/U(1)×SU(2)×SU(3)×SU(5). (en)
Title
  • The classification of homogeneous Einstein metrics on flag manifolds with b2(M)=1
  • The classification of homogeneous Einstein metrics on flag manifolds with b2(M)=1 (en)
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  • The classification of homogeneous Einstein metrics on flag manifolds with b2(M)=1
  • The classification of homogeneous Einstein metrics on flag manifolds with b2(M)=1 (en)
skos:notation
  • RIV/00216224:14310/13:00067050!RIV14-GA0-14310___
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  • P(GBP201/12/G028)
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  • in press
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  • Chrysikos, Ioannis
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  • 65614
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  • RIV/00216224:14310/13:00067050
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  • Homogeneous Einstein metric; Flag manifold; Second Betti number; Riemannian submersion; Finiteness conjecture; Twistor fibration (en)
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  • DK - Dánské království
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  • [0CDB48D0FF6B]
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  • Bulletin des Sciences Mathématiques
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  • 138/2014
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  • Chrysikos, Ioannis
  • Sakane, Yusuke
issn
  • 0007-4497
number of pages
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  • 10.1016/j.bulsci.2013.11.002
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  • 14310
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