Non-Defectivity of Grassmannians of planes

Hirotachi Abo, Giorgio Ottaviani, Chris Peterson

Let $Gr(k,n)$ be the Plücker embedding of the Grassmann variety of projective $k$-planes in $\P n$. For a projective variety $X$, let ${\sigma }_s(X)$ denote the variety of its $s-1$ secant…