Abstract
The aim of Bogomolov’s programme is to prove birational anabelian conjectures for function fields K|k of varieties of dimension ≥ 2 over algebraically closed fields. The present article is concerned with the 1-dimensional case. While it is impossible to recover K|k from its absolute Galois group alone, we prove that it can be recovered from the pair (Aut(\(\bar K\)|k), Aut(\(\bar K\)|K)), consisting of the absolute Galois group of K and the larger group of field automorphisms fixing only the base field.
Similar content being viewed by others
References
E. Artin, Geometric Algebra, Interscience, New York–London, 1957.
F. A. Bogomolov, On two conjectures in birational algebraic geometry, in Algebraic Geometry and Analytic Geometry (Tokyo, 1990), ICM-90 Satellite Conference Proceedings, Springer, Japan, 1991, pp. 26–52.
F. Bogomolov and Y. Tschinkel, Reconstruction of function fields, Geometric and Functional Analysis 18 (2008), 400–462.
A. J. Engler and A. Prestel, Valued Fields, Springer Monographs in Mathematics, Springer, Berlin, 2005.
R. Hartshorne, Algebraic Geometry, Graduate Texts in Mathematics, Vol. 52, Springer, New York–Heidelberg, 1977.
D. Harbater, Fundamental groups and embedding problems in characteristic p, in Recent Developments in the Inverse Galois Problem, Contemporary Mathematics, Vol. 186, American Mathematical Society, Providence, RI, 1995, pp. 353–369.
N. Jacobson, Lectures in Abstract Algebra. Vol. III: Theory of Fields and Galois Theory, D. Van Nostrand, Princeton, NJ–Toronto, ON–London–New York, 1964.
F. Pop, On the Galois theory of function fields of one variable over number fields, Journal für die Reine und Angewandte Mathematik 406 (1990), 200–218.
F. Pop, Étale Galois covers of affine smooth curves. The geometric case of a conjecture of Shafarevich. On Abhyankar’s conjecture, Inventiones Mathematicae 120 (1995), 555–578.
F. Pop, Recovering function fields from their decomposition graphs, in Number Theory, Analysis and Geometry, Springer, New York, 2012, pp. 519–594.
I. I. Pjateckiĭ-Šapiro and I. R. Šafarevič, Galois theory of transcendental extensions and uniformization, Izvestiya Akademii Nauk SSSR. Seriya Matematicheskaya 30 (1966), 671–704; English Translation in American Mathematical Societies Translations 69 (1968), 111–145.
M. Rovinsky, On certain isomorphisms between absolute Galois groups, Compositio Mathematica 136 (2003), 61–67.
M. Rovinsky, Motives and admissible representations of automorphism groups of fields, Mathematische Zeitschrift 249 (2005), 163–221.
J.-P. Serre, Galois Cohomology, Springer-Verlag, Berlin, 1997
G. Shimura, Introduction to the Arithmetic Theory of Automorphic Functions, Publications of the Mathematical Society of Japan, Vol. 11, Iwanami Shoten, Tokyo; Princeton University Press, Princeton, NJ, 1971.
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Lüdtke, M. A birational anabelian reconstruction theorem for curves over algebraically closed fields in Arbitrary Characteristic. Isr. J. Math. 227, 987–1011 (2018). https://doi.org/10.1007/s11856-018-1757-2
Received:
Revised:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s11856-018-1757-2