Non-abelian local invariant cycles |
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Authors: | Yen-lung Tsai Eugene Z Xia |
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Institution: | Department of Mathematical Sciences, National Chengchi University, Taipei 116, Taiwan ; Department of Mathematics, National Cheng Kung University, Tainan 701, Taiwan |
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Abstract: | Let be a degeneration of Kähler manifolds. The local invariant cycle theorem states that for a smooth fiber of the degeneration, any cohomology class, invariant under the monodromy action, comes from a global cohomology class. Instead of the classical cohomology, one may consider the non-abelian cohomology. This note demonstrates that the analogous non-abelian version of the local invariant cycle theorem does not hold if the first non-abelian cohomology is the moduli space (universal categorical quotient) of the representations of the fundamental group. |
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