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Rational functions on elliptic curves over global fields with given support

Let $E$ be an elliptic curve over a global field $k$. Let $x_1, \dots, x_r$ be a set of generators of $E(k) / E(k)_{tor}$ (or more generally, a $\mathbb Q$-basis of $E(k)_{\mathbb Q}$), and let $x_0$ ...
yoyo's user avatar
  • 77
2 votes
0 answers
139 views

Effective Bombieri-Lang conjecture

The Bombieri-Lang conjecture is the following well-known conjecture: Let $X$ be a projective variety defined over a number field $K$. Suppose that $X$ is general type. Then $X(K)$, the set of $K$-...
Stanley Yao Xiao's user avatar
1 vote
0 answers
89 views

Generic reducedness of geometric generic fibre

Let $f:X\to Y$ be a surjective morphism between two projective schemes over a field of characteristic $p>0$. Also assume that $X$ is smooth,$Y$ smooth & irreducible and $f_*\mathcal{O}_X=\...
user267839's user avatar
  • 5,986
3 votes
0 answers
57 views

p-torsion in the Tate-Shafarevich group of supersingular elliptic curves

Let $E$ be a supersingular elliptic curve over $\mathbb{F}_p(t)$. Is something known on the $p$-torsion of the Tate–Shafarevich group in this case? In particular, I would like to know if (or if known ...
user 123935's user avatar