Qifeng Li

collaborators

3 papers

math.AG2026

Fundamental forms and infinitesimal symmetries of projective varieties

Jun-Muk Hwang, Qifeng Li

We give a bound on the dimension of the linear automorphism group of a projective variety $Z \subset P V$ in terms of its fundamental forms at a general point. Moreover, w…

math.AG2026

Homological rigidity and Schur rigidity of Schubert varieties in rational homogeneous spaces

Cong Ding, Qifeng Li

A Schubert variety $X_{0}$ on a rational homogenous space $X = G / P$ is said to be homologically rigid, if any subvariety $Z$ on $X$ representing the same homology class with $X_{0}$ must…

math.AG2025

Minimal rational curves on equivariant compactifications of symmetric spaces

Jun-Muk Hwang, Qifeng Li

Let $G / H$ be a symmetric space of a complex linear algebraic group $G$ and let $X$ be a nonsingular equivariant compactification of $G / H$ . We investigate the question: when are min…