Grzegorz Banaszak (Uniwersytet im. Adama Mickiewicza Poznan)
On Arithmetic in Mordell-Weil groups
Monday May 4th, 2009 at 4 pm in FOXBORO

Let $A/F$ be an abelian variety over a number field $F,$ let $P \in A(F)$ and $\Lambda \subset A(F)$ be a subgroup of the Mordell-Weil group. For a prime $v$ of good reduction let $r_v : A(F) \rightarrow A_v (k_v)$ be the reduction map. During my talk I will show that the condition $r_v (P) \in r_v (\Lambda)$ for almost all primes $v$ imply that $P \in \Lambda + A(F)_{tor}$ for a wide class of abelian varieties.
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