https://www.math.pku.edu.cn/pzhang/en/authors/yan-ding/ Yan Ding Wowchemy (https://wowchemy.com)en-usTue, 01 Jan 2008 00:00:00 +0000 https://www.math.pku.edu.cn/pzhang/en/authors/yan-ding/avatar_hu841bf951dcae960c4a014161cfbba913_18865_270x270_fill_q75_lanczos_center.jpg https://www.math.pku.edu.cn/pzhang/en/authors/yan-ding/ https://www.math.pku.edu.cn/pzhang/en/publication/2008_asscmfrpmke/ Tue, 01 Jan 2008 00:00:00 +0000 https://www.math.pku.edu.cn/pzhang/en/publication/2008_asscmfrpmke/