Ax-Schanuel and strong minimality for the j-function
نویسندگان
چکیده
Let K:=(K;+,⋅,D,0,1) be a differentially closed field of characteristic 0 with constants C. In the first part paper we explore connection between Ax-Schanuel type theorems (predimension inequalities) for differential equation E(x,y) and geometry fibres Us:={y:E(s,y)∧y∉C} where s is non-constant element. We show that certain types predimension inequalities imply strong minimality geometric triviality Us. Moreover, induced structure on Cartesian powers Us given by special subvarieties. particular, since j-function satisfies an inequality required form (due to Pila Tsimerman), applying our results recover theorem Freitag Scanlon stating j defines strongly minimal set trivial geometry. second study sets in j-reducts fields. Ej(x,y) (two-variable) j-function. prove Zilber style classification result reduct K:=(K;+,⋅,Ej). More precisely, K all are geometrically or non-orthogonal Our proof based matching Existential Closedness statement which asserts systems equations terms Ej have solutions unless having solution contradicts Ax-Schanuel.
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15 صفحه اولFrom the Minimality of J We Have That J = L 0 1. for Example, N L
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ژورنال
عنوان ژورنال: Annals of Pure and Applied Logic
سال: 2021
ISSN: ['0168-0072', '1873-2461']
DOI: https://doi.org/10.1016/j.apal.2020.102871