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Diophantine equations, rational points, abelian varieties, Arakelov theory, Iwasawa theory.

1 vote
1 answer
215 views

Is the number of twists of a curve with a section in a given field finite

Let $X$ be a smooth projective geometrically connected curve over a number field $k$ of genus $g\geq 2$. Is the number of twists of $X$ always infinite? (The answer is no, because there aren't any tw …
Francesco's user avatar
  • 281
27 votes
6 answers
4k views

Does the moduli space of smooth curves of genus g contain an elliptic curve

Let $M_g$ be the moduli space of smooth projective geometrically connected curves over a field $k$ with $g\geq 2$. Note that $M_g$ is not complete. Does $M_g$ contain an elliptic curve? The answer i …
Francesco's user avatar
  • 281