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一、相逢未名湖1954年9月,我从河南汝南来到未名湖畔。北大数学力学系一年级新生220多人。9个小班,我在5班。1950年代北大很重视基础课程。程民德教授讲微积分,江泽涵教授讲解析几何,周培源教授讲过普通物理,美国归来的力学家王仁教授讲理论力学。大一时,在解析几何教科书上看到函数方程f(x+y)=f(x)+f(y)的连续解只有f(x)=cx。想到一个确定它全部解的方法,写成论文,居然顺利地在《数学进展》刊出。没有高兴多久,编辑部来信了,说读者来函问:关于这结果,前人有哪些工作?并指出:研究者在发表自
First, meet the unnamed lake In September 1954, I came from Henan Runan Lake unnamed. Peking University Department of Mathematical Mechanics more than 220 freshmen. 9 small classes, I am in 5 classes. Peking University attaches great importance to basic courses in the 1950s. Prof. Cheng Minde spoke about calculus, Professor Jiang Zehan talked about analytic geometry, Professor Zhou Peiyuan talked about ordinary physics, Professor Wang Ren, a mechanist returning from the United States, talked about theoretical mechanics. Freshman, see the analytic geometry textbook see the function of the equation f (x + y) = f (x) + f (y) continuous solution only f (x) = cx. Think of a way to determine all of it, written in the paper, actually successfully published in “Math Progress.” Not happy how long, the editorial letter, said the reader letter asked: on the results of what previous work? And pointed out that researchers published in