编者的话今年是建国五十年人数学通报随着新中国艰苦创业大步向前的步伐也走过了自己的半个多世纪．回忆，不管是甜是苦，总是有益的，美好的，总是激励自己更有信心地面向未来．在这里再次刊出过去五十年中发表过的几篇文章，为的是和我们的老、新读者一块回忆一下本刊走过的 Editor’s Note This year is the 50-year-old mathematics report of the founding of the People’s Republic of China. It has gone through more than half of a century as the new China has made strenuous efforts. Memories, whether it’s sweet or bitter, always helpful, good, always motivates you to face the future with more confidence. Here again, I have published several articles published in the past 50 years in order to remember our old and new readers.