关肇直同志离开我们已经十年了。今天举行会议缅怀关先生这位卓越的科学家,很有意义。 关先生是一位数学大师,在数学上造诣很深,贡献很大,在泛函、拓扑、非线性、数学、物理、力学等方面都作出过第一流的成就。六十年代我曾有幸在他的直接领导下作过一点控制论方面的研究工作,对他为发展祖国科学事业的献身精神、研究工作中的科学 Commissioner Guan Zhao straight away from us for ten years. It is very meaningful to hold a meeting today to honor Mr. Kwan, a brilliant scientist. Mr. Guan is a math guru with deep knowledge and profound contributions in mathematics. He has made first-class achievements in functional, topological, nonlinear, math, physics and mechanics. In the 1960s, I was fortunate enough to have made some research on cybernetics under his direct leadership. I was greatly impressed by his dedication to the development of science in the motherland and his work in science