“几何刘”姓刘，名际和，我的初三数学老师。“几何刘”这个大号并非我们原创，早先也有同事偶尔这样叫他，但多出于戏谑，真正让“几何刘”美名远扬的是我们。这就如同一首革命老歌，唱了几十年都没有走红，突然有一天，被别出心裁的音乐人重新配了器，换了唱法，由“民族”? “Ge Liu” surnamed Liu, Mingji He, my junior math teacher. The “Geometry Liu” is not our original large scale. Earlier, some of my colleagues called him occasionally, but it was mostly ridiculous. It was us that really made Geometry Liu famous. This is like a revolutionary old song, singing for decades has not become popular, and suddenly one day, by the ingenuity of the musicians to reconfigure the device, for the singing method, from the “nation”?