Geodesic
Manin homomorphisms for elliptic curves over a field of formal power series
Matematičeskie zametki, Tome 12 (1972) no. 4, pp. 425-432 
Yu. R. Vainberg. Manin homomorphisms for elliptic curves over a field of formal power series. Matematičeskie zametki, Tome 12 (1972) no. 4, pp. 425-432. http://geodesic.mathdoc.fr/item/MZM_1972_12_4_a9/
@article{MZM_1972_12_4_a9,
     author = {Yu. R. Vainberg},
     title = {Manin homomorphisms for elliptic curves over a field of formal power series},
     journal = {Matemati\v{c}eskie zametki},
     pages = {425--432},
     year = {1972},
     volume = {12},
     number = {4},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1972_12_4_a9/}
}
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Voir la notice de l'article provenant de la source Math-Net.Ru

In this paper we describe the intersection of the kernels of Manin homomorphisms for an arbitrary elliptic curve over a field of formal power series.