Ranks and sets evincing them for the tangent developable

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Edoardo Ballico

Abstract

Let X PPr be an integral and non-degenerate variety. We study the complement in the k-secant variety of X of the set of all points with X-rank k. In the case k=2 this is contained in the tangent developable τ(X) of X and we study its X-ranks and the sets evincing them when X is a smooth OADP, i.e. X=n, r=n+1 and a general point of PP2n+1 is contained in a unique secant line of X.

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How to Cite
Ballico, E. (2019). Ranks and sets evincing them for the tangent developable. Gulf Journal of Mathematics, 7(2). https://doi.org/10.56947/gjom.v7i2.8
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