Institution: | 1. Department of Mathematics, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China;2. Oita Maizuru High School, 1-19-1 Imazuru, Oita 870-0938, Japan;3. Institute of Mathematics for Industry, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan |