Secant variety

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In Algebraic Geometry, the Zariski closure of the union of the secant lines to an embedded projective variety  X\subset\mathbb{P}^n is the first secant variety to X.

[edit] References

  • Joe Harris, Algebraic Geometry, A First Course, (1992) Springer-Verlag, New York. ISBN 0-387-97716-3