Gabriele Eckart: Hitchhiking. Twelve German Tales
نویسندگان
چکیده
منابع مشابه
Eckart Viehweg And
Example 0.1. Let f : X → P be a non-isotrivial semistable family of Abelian varieties of dimension g over the complex line, then: i. s = #{ singular fibres } ≥ 4. ii. s = 4 if and only if f is isogenous to E ×P1 E ×P1 · · · ×P1 E where E → P is one of the 6 modular families of elliptic curves, smooth over P \ {y1, . . . , y4} for some distinct points y1, . . . , y4 ∈ P (as described in [Beauvil...
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Assume that the family f is not isotrivial, hence that for no finite covering Y ′ → Y one has a birational map X ×Y Y ′ → F × Y . If one assumes in addition that the smooth fibres F of f are minimal models, then for ν > 1 the left hand side of (1) is strictly larger than zero. If Y = P one sees that #S ≥ 3. Here we are interested in the case ν = 1, assuming that the non-isotriviality implies de...
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ژورنال
عنوان ژورنال: GDR Bulletin
سال: 1993
ISSN: 2159-5941
DOI: 10.4148/gdrb.v19i1.1076