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The invariant of Chen-Nagano on flag manifolds

Author: Cristián U. Sánchez
Journal: Proc. Amer. Math. Soc. 118 (1993), 1237-1242
MSC: Primary 53C30; Secondary 53C22, 53C35
MathSciNet review: 1163336
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Abstract: In this paper an extension of the $ 2$-number $ ({\char93 _2}(M))$ of a symmetric space is given for $ k$-symmetric spaces. The new invariant is computed for flag manifolds which are not symmetric. It turns out to be equal to the Euler-Poincaré characteristic.

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Keywords: $ 2$-Number, $ k$-number, $ k$-symmetric spaces, flag manifolds
Article copyright: © Copyright 1993 American Mathematical Society

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