6月6日(木) 15:00 -- 16:00 程 晋 教授(復旦大学数学系、中国) ``Numerical Differentiation and its Application'' 16:15 -- 17:15 李 大潜 教授(復旦大学数学系、中国) ``Some results on the exact boundary controllability for quasi-linear hyperbolic systems'' <研究発表要旨> (1)``Numerical Differentiation and its Application'' We present some results about the numerical differentiation in one and two dimensional cases. Some applications are given. (2)``Some results on the exact boundary controllability for quasi-linear hyperbolic systems'' By means of the existence and uniqueness of semi-global C^{1} solution to the mixed initial-boundary value problem for quasi-linear hyperbolic systems, we present some recent results on the local exact boundary controllability for general one-dimensional first order quasi-linear hyperbolic systems with nonlinear boundary conditions.