Anabelian geometry and descent obstructions on moduli spaces

We study the section conjecture of anabelian geometry and the sufficiency of the finite descent obstruction to the Hasse principle for the moduli spaces of principally polarized abelian varieties and of curves over number fields. For the former we show that the section conjecture fails and the finite descent obstruction holds for a general class of adelic points, assuming several well-known conjectures. This is done by relating the problem to a local-global principle for Galois representations. For the latter, we prove some partial results that indicate that the finite descent obstruction suffices. We also show how this sufficiency implies the same for all hyperbolic curves.Comment: exposition improve

Anabelian geometry and descent obstructions on moduli spaces

We study the section conjecture of anabelian geometry and the sufficiency of the finite descent obstruction to the Hasse principle for the moduli spaces of principally polarized abelian varieties and of curves over number fields. For the former we show that the section conjecture fails and the finite descent obstruction holds for a general class of adelic points, assuming several well-known conjectures. This is done by relating the problem to a local-global principle for Galois representations. For the latter, we show how the sufficiency of the finite descent obstruction implies the same for all hyperbolic curves

Practical Hypermedia and Hypertext [Book Chapter]

Chapter from Multimedia and Language Learning. Technology in Higher Education : Current Reflections. Fourth in a Series, eds. Peter Patrikis and others. About this book: The five essays in this volume represent the contributions of one group of leaders in the application of computers to the teaching and learning of foreign languages and illustrate present and future uses of technology in assisting language learning. Various pedagogical problems and approaches are considered in the papers.https://digitalcommons.usm.maine.edu/facbooks/1481/thumbnail.jp