應yl7703永利官網邀請, 香港科技大學數(shù)學系蔡劍鋒教授將于2021年5月24日在城關校區(qū)西區(qū)學生活動中心506會議室舉辦專題學術報告.

報告題目：Landscape analysis of non-convex optimizations in phase retrieval

時 間：2021年5月24日(星期一) 10:30-11:10

線下地點: 蘭州大學城關校區(qū)西區(qū)學生活動中心五樓506會議室

騰訊會議ID：815 669 991，會議密碼：123456

報告摘要：

Non-convex optimization is a ubiquitous tool in scientific and engineering research. For many important problems, simple non-convex optimization algorithms often provide good solutions efficiently and effectively, despite possible local minima. One way to explain the success of these algorithms is through the global landscape? analysis. In this talk, we present some results along with this direction for phase retrieval. The main results are, for several of non-convex optimizations in phase retrieval, a local minimum is also global and all other critical points have a negative directional curvature. The results not only explain why simple non-convex algorithms usually find a global minimizer for phase retrieval, but also are useful for developing new efficient algorithms with a theoretical guarantee by applying algorithms that are guaranteed to find a local minimum.

蔡劍鋒教授簡介

蔡劍鋒教授, 少求學于湖湘, 拜師于復旦大學魏益民教授, 攻博于香港中文大學（導師陳漢夫教授）, 后游學于新加坡國立大學, 美國依阿華大學, 復供職于香港科技大學. 是為當今計算數(shù)學界之青年代表人物.蔡劍鋒教授發(fā)表學術著作90多篇，文章引用次數(shù)達1萬多次。

甘肅省高校應用數(shù)學與復雜系統(tǒng)省級重點實驗室

yl7703永利官網

蘭州大學萃英學院

2021年5月20日