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

7 votes
0 answers
190 views

Almost rational point

Let $X$ be a variety over a number field $K$. Let $S$ be a finite set of places of $K$. Is there a notion of a point $p \in X(\overline{K})$ to be "almost rational" in the following sense?: $p$ and $ …
Gazerun's user avatar
  • 463
3 votes
1 answer
487 views

Trivial Weil-Châtelet group

Does there exist an elliptic curve over a number field $K$ such that $WC(E/K)\cong H^1(G_K, E)$ is trivial?
Gazerun's user avatar
  • 463
26 votes
4 answers
1k views

Variety acquiring rational point over any quadratic extension

Does there exist a variety $X$ over $\mathbb{Q}$ (or a number field) such that it has no rational points over $\mathbb{Q}$ but acquires points over any quadratic extension $\mathbb{Q}(\sqrt{d})$? If …
Gazerun's user avatar
  • 463