Higher secant varieties of Segre-Veronese varieties

M. V. Catalisano, A. V. Geramita, A. Gimigliano

We study the dimension of the higher secant varieties $X^s$ of $\mathbb{X}={\mathbb{P}}^{n_1}\times ...\times {\mathbb{P}}^{n_t}$ embedded the morphism given by ${\cal O}_{\Bbb X}({a_1,...…