Speaker: Dohan Kim (Seoul National University, Korea)Venue: Room 105, Building 2, Haina Court, Zijingang CampusAbstract: 1) From Almost Nothing to Fields Medal;2) Academic Exchange between China and Korea in Mathematics.Contact person: Junde Wu (wjd@zju.edu.cn)Curriculum vitae of speaker:1) PersonalBirth Date: May 15, 1950.2) EducationB.S. in Electronics Engineering, Seoul National University, 1972M.S. in Mathematics, Seoul National University, 1974Ph. D. in Mathematics, Rutgers University (Thesis Adviser, F. Treves), 19813) Experience in Seoul National UniversityProfessor, 1992~Chairman, Department of Mathematics, 2003~ 2005Deputy Director & Director, BK21 Mathematical Science Division SNU, 1999~20064) Professional Organization Korean Mathematical SocietyVice President 1997~ 2006President, 2007~ 20105) National Academy of Science, Republic of KoreaMember, since 2016Chair, Division I of Science, 2018~ 20196) Korean Academy of Science and TechnologyMember, since 2006Chair, Division of Science, 2016~2019Chair, Prize Committee, since 20197) International Congress of Mathematicians, Seoul 20142011~2014 Chair, Advisory Committee, Organizing Committee for 2014 ICM at Seoul2013 Chair, Organizing Committee, AMC 2013 (Asian Mathematical Conference) at Busan8) Area of SpecializationDistributions and HyperfunctionsFourier AnalysisLinear Partial Differential EquationsOrdinary Differential Equations

Venue: Room 210, Building 2, Haina Court, Zijingang Campus

Speaker: Prof. JI Rurong (Duke University)Venue: Room 205, Complex Building, School of Medicine, Zijingang CampusHost: Prof. GAO Zhihua (Zhejiang University)

Speaker: Prof. TU Yundong (Peking University)Venue: Room 206, Building 2, Haina Court, Zijingang CampusAbstract: This paper explores the group structure in large dimensional approximate factor models, which portrays homogeneous effects of the common factors on the individuals that fall into the same group. With the initial principle component estimates, we identify the unknown group structure by a combination of the agglomerative hierarchical clustering algorithm and an information criterion. The loadings and factors are then re-estimated conditional on the identified groups. Under some regularity conditions, we establish the consistency of the membership estimator as well as that of the group number estimator obtained from the information criterion. The new estimators under the group structure are shown to achieve efficiency gain compared to those obtained without this information. Numerical simulations and empirical applications demonstrate the nice finite sample performance of our proposed approach when group structure presents.Contact person: Prof. ZHANG Rongmao (rmzhang@zju.edu.cn)

Speaker: Dr. LI Mingxiang (Nanjing University)Venue: Room 105, Building 2, Haina Court, Zijingang CampusAbstract: In this talk, we will introduce some rigidity theorems on complete and conformally flat manifolds with help of Q-curvature. We introduce a new volume entropy to give a sufficient and necessary condition for the ”normal” metric. Meanwhile, with help of geometric measure theory, we give a distance comparison identity on such manifolds which generalize the result of Li-Tam(1991, JDG) to higher dimensions. Finally, we want to talk about higher order Bol’s inequality which is a joint work with Professor Juncheng Wei.Contact person: Prof. JIANG Wenshuai (wsjiang@zju.edu.cn)

Speaker: Prof. Jianfeng Lin (Tsinghua University)Venue: Lecture Hall, East Building 7, Zijingang Campus

Speaker:  Prof. HU Yeyao (Central South University)Venue: Room 102, Building 2, Haina Court, Zijingang CampusAbstract: In this talk, we will first review the resolution of the celebrated Chang-Yang’s conjecture on a sharp Moser-Trudinger type inequality on the two-dimensional sphere. Then we recall the complete theory in dimension one and emphasize the key role played by mean field type equations. Moreover, higher dimensional analogues will be presented and some very recent progress will be introduced. We will also mention some related open problems that the audience might be interested in.Contact person: Prof. JIANG Wenshuai (wsjiang@zju.edu.cn)

Speaker: Dr. Xiaoping Chen (University of Washington)Venue: Room 723, Building A, SOM, Zijingang CampusAbstract: Indirect cronyism is a phenomenon in which managers show favoritism to indirect guanxihu subordinates who have informal, particular, and personal connection with a third party (e.g., another manager) and demonstrate its prevalent existence in Chinese organizations. We explore the crucial factors that may exacerbate managers to engage in indirect cronyism, and the downstream consequences on other members of the organization. We draw on the indirect reciprocity logic embedded in social exchange theory to predict two underlying motives to explain why managers engage in indirect cronyism: (a) fulfilling their felt obligation to favor the indirect guanxihu subordinate, and (b) strengthening their own guanxi with the third party. Results from three scenario-based experiments and one field study sampling a total of 1,559 working adults provide consistent support for our theoretical reasoning and hypotheses. We discuss the theoretical contributions this paper makes to advance the guanxi and cronyism literature, as well as the practical implications of our findings in Chinese organizations and beyond.Profile of the speaker: Dr. Xiaoping Chen is Philip M. Condit Endowed Chair Professor in the Michael G. Foster School of Business, University of Washington. Dr. Chen is an elected Fellow at American Psychological Association and Society for Industrial and Organizational Psychology. She has served as Editor-in-Chief for Organizational Behavior and Human Decision Processes (2010-2016) and is currently the Editor-in-Chief for Management and Organization Review. Professor Chen’s research interests include cooperation and competition in social dilemmas, teamwork and leadership, entrepreneur passion, Chinese guanxi, and cross-cultural communication and management.