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Über Deformationen von analytischen Abbildungskeimen

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Abstract

The notion of deformations of germs of k-analytic mappings generalizes the one of deformations of germs of k-analytic spaces. Using algebraic terms, we prove:

  1. 1.

    The morphism f: A→B of analytic algebras is rigid, iff it is infinitesimally rigid. Moreover, this is equivalent to ExA (B,B)=0. This theorem generalizes a result of SCHUSTER [11].

  2. 2.

    Let A be a regular analytic algebra. Then f is rigid iff there exists a rigid analytic algebra Bo such that f is equivalent to the canonic injection A→A⊗Bo.

  3. 3.

    If f is “almost everywhere” rigid or smooth, then the injection Ext lB B|A, Bn)→ExA(B, Bn) is an isomorphism.

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Kramm, B. Über Deformationen von analytischen Abbildungskeimen. Manuscripta Math 10, 163–189 (1973). https://doi.org/10.1007/BF01475040

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  • DOI: https://doi.org/10.1007/BF01475040

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