报告题目 (Title)：Variational Analysis and Convexity in Optimal Control（最优控制中的变分分析与凸性）
报告人 (Speaker)：Tyrrell Rockafellar（University of Washington）
报告时间 (Time)：2026年4月18日(周六) 15:00
报告地点 (Place)：宝山校区F309
邀请人(Inviter)：余长君
报告摘要：Optimal control theory was considered by its originators to be a new subject which superseded much of the classical calculus of variations as a special case. In reality, it was more a reformulation of existing theory with different goals and perspectives. Now both can be united in a broader setting of variational analysis in which Lagrangian and Hamiltonian functions need not be differentiable or even continuous, but extended-real-valued, and convexity has a central role. This opens new perspectives even in the computation of optimal controls.