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Trudy Matematicheskogo Instituta imeni V.A. Steklova, 2003, Volume 240, Pages 82–219
(Mi tm384)
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This article is cited in 62 scientific papers (total in 63 papers)
Prelimiting Flips
V. V. Shokurov Johns Hopkins University
Abstract:
The paper discusses an inductive approach to constructing log flips. In
addition to special termination and thresholds, we introduce two new
ingredients: the saturation of linear systems, and families of divisors
with confined singularities. We state conjectures concerning these notions
in any dimension and prove them in general in dimension ⩽2. This
allows us to construct prelimiting flips (pl flips) and all log flips in
dimension 4 and to prove the stabilization of an asymptotically saturated
system of birationally free (b-free) divisors under certain conditions in
dimension 3. In dimension 3, this stabilization upgrades pl flips to
directed quasiflips. It also gives for the first time a proof of the
existence of log flips that is algebraic in nature, that is, via f.g. algebras, as opposed to geometric flips. It accounts for all the currently
known flips and flops, except possibly for flips arising from geometric
invariant theory.
Received in May 2002
Citation:
V. V. Shokurov, “Prelimiting Flips”, Birational geometry: Linear systems and finitely generated algebras, Collected papers, Trudy Mat. Inst. Steklova, 240, Nauka, MAIK «Nauka/Inteperiodika», M., 2003, 82–219; Proc. Steklov Inst. Math., 240 (2003), 75–213
Linking options:
https://www.mathnet.ru/eng/tm384 https://www.mathnet.ru/eng/tm/v240/p82
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Abstract page: | 887 | Full-text PDF : | 547 | References: | 90 |
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