Abstract
We study the normalized elliptic genera Φ(X)=ϕ(X)/εk/2 for 4k-dimensional homogeneous spin manifolds X and show that they are constant as modular functions. The basic tool is a reduction formula relating Φ(X) to that of the self-intersection of the fixed point set of an involution γ on X. When Φ(X) is a constant it equals the signature of X. We derive a general formula for sign(G/H), G⊃H compact Lie groups, and determine its value in some cases by making use of the theory of involutions in compact Lie groups.
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Dedicated to Jacques Tits on the occasion of his sixtieth birthday
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Hirzebruch, F., Slodowy, P. Elliptic genera, involutions, and homogeneous spin manifolds. Geom Dedicata 35, 309–343 (1990). https://doi.org/10.1007/BF00147351
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DOI: https://doi.org/10.1007/BF00147351