On the stratification by X-ranks of a linearly normal elliptic curve X ⊂ P^n
AbstractLet X⊂ P^n be a linearly normal elliptic curve. For any P in P^n the X-rank of P is the minimal cardinality of a set S ⊂ X such that P in \langle S \rangle.
In this paper we give an almost complete description of the stratification of P^n given by the X-rank and the open X-rank.
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