EAN: 9783642306730

Bilder-Quelle: discount24.de - Sport-Freizeit

The section conjecture in anabelian geometry announced by Grothendieck in 1983 is concerned with a description of the set of rational points of a hyperbolic algebraic curve over a number field in terms of the arithmetic of its fundamental group. While the conjecture is still open today in 2012 its study has revealed interesting arithmetic for curves and opened connections for example to the question whether the Brauer-Manin obstruction is the only one against rational points on curves. This monograph begins by laying the foundations for the space of sections of the fundamental group extension of an algebraic variety. Then arithmetic assumptions on the base field are imposed and the local-to-global approach is studied in detail. The monograph concludes by discussing analogues of the section conjecture created by varying the base field or the type of variety or by using a characteristic quotient or its birational analogue in lieu of the fundamental group extension.

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08.11.2025 um 14:19 Uhr

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