## VARIETIES WITH QUADRATIC ENTRY LOCUS, I (2007)

by
Francesco Russo

Citations: | 2 - 1 self |

### BibTeX

@MISC{Russo07varietieswith,

author = {Francesco Russo},

title = {VARIETIES WITH QUADRATIC ENTRY LOCUS, I},

year = {2007}

}

### OpenURL

### Abstract

We shall introduce and study quadratic entry locus varieties, a class of projective algebraic varieties whose extrinsic and intrinsic geometry is very rich. Let us recall that, for an irreducible non-degenerate variety X ⊂ P N of dimension n ≥ 1, the secant defect of X, denoted by δ(X), is the difference between the expected dimension and the effective dimension of the