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Log Smooth Deformation Theory

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arxiv alg-geom/9406004 v3 pith:OJR4T5I7 submitted 1994-06-15 alg-geom math.AG

classification alg-geommath.AG
keywords deformationtheorysmoothdeformationsgivesintroducedrelativealgebraic
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This paper gives a foundation of log smooth deformation theory. We study the infinitesimal liftings of log smooth morphisms and show that the log smooth deformation functor has a representable hull. This deformation theory gives, for example, the following two types of deformations: (1) relative deformations of a certain kind of a pair of an algebraic variety and a divisor of it, and (2) global smoothings of normal crossing varieties. The former is a generalization of the relative deformation theory introduced by Makio, and the latter coincides with the logarithmic deformation theory introduced by Kawamata and Namikawa.

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  1. Polync varieties and multiparameter Kulikov models

    math.AG 2026-01 conditional novelty 7.0 of 10

    Polync varieties generalize normal-crossing degenerations; the paper proves d-semistable K-trivial polync varieties are smoothable and constructs multiparameter Kulikov models with explicit examples.

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