In memory of professor Xu Guozhang 并列题名:In memory of professor Xu Guozhang in memory of professor Mengxiancheng In memory of Professor Liao Hua Yang 并列题名：In memory of Professor Liao Hua Yang 师范之师：怀念孟宪承：in memory of professor Mengxiancheng selected works of professor Lu Peisheng in memory of professor Valentin Afraimovich in honour of professor Gregory Chow In memory of memory：a romance