教师信息

陈学长
教授、博导


联系方式
Department of Mathematics, Nanjing University, 22 Hankou Road, Nanjing 210093, P.R. China

电子邮件
xuezhangchen@nju.edu.cn


研究领域
Geometric analysis and partial differential equations


办公地址
309-3 Meng Minwei Building, Math Department, Gulou Campus




主要课程
Spring 2021:Differential Geometry (undergraduate), seetextbook.
Fall 2020: Calculus, see herefor 2017-2019 tests.
Spring 2020:Differential Geometry (undergraduate), seetextbook.
Fall 2019: Partial Differential Equations (undergraduate), seetextbook.
Spring 2019:Differential Geometry (undergraduate), seetextbook.
Fall 2018: Partial Differential Equations (undergraduate), seetextbook.
Spring 2018:Differential Geometry (undergraduate), seetextbook.
Fall 2017: Geometric Analysis ( We mainly focuson the recent developments on the existence of a conformal metricwith positiveconstant Q-curvature. The contents include the derivation of Q-curvature as well as Paneitz operator, the existence results when the related conformal invariance are positive, etc. This topic is selected from a seriece of papers by Sun-YungAlice Chang-Paul Yang, M. Gursky, A. Malchiodi, F. B. Hang, Y. J. Lin et al.)


The following topic has beenleft to some future semester:
(textbook:Sorin Dragomir and Giuseppe Tomassini, Differential Geometry and Analysis on CR Manifolds, Progress in Mathematics, Vol 246, 2006.This couse is mainly concerned withthe CR Yamabe problem and its resolution).Prerequisites of this class: Differential Geometry (Undergraduate) and something about Riemannian Geometry.
Spring 2017: (1) Differential Geometry (undergraduate), seetextbook.(2) Discussion course (undergraduate,a little bit like a seminar): The compactness of the Yamabe problem.
Fall 2016: Geometric Analysis (plan to presentrelatively completeproofs of the existence of scalar-flatconformal metrics withconstant boundary mean curvatureon compact manifolds with boundary, including the formulation of this problemand motivation of the study on this problem).
Spring 2015:Partial Differential Equations II (the Yamabe problem and a brief introduction to the mean curvature problem on a compact manifoldwith boundary).
Spring 2014: Partial Differential Equations II (Geometric wave equations, focus on wave maps)
and Real Analysis, Calculus, etc.


个人简介
Born on 1st Aug. 1980, Chinese citizen,

xuezhangchen@nju.edu.cn

Office Address:

309-3MengMinwei Building, Math Department,Gulou Campus.
My recent research interests are rigidity theorems on compact manifolds with boundary;prescribed curvature problems andgeometric flows in conformal geometry, such as, scalar curvature flow, Q-curvature flow, scalar curvature plus mean curvature flow, on compact manifolds; andfractional Q-curvature flow on the unit sphere.


Positions in 2021 for Phd students/Postdoctors:
(1)Prerequisitesofmy future Phd students(No master student positions are available)
First of all, you should be interested in geometry, explicitly differential geometry and Riemannian geometry.Definitely you will benefitfrom the following two courses:
(i)Partial Differential Equations; (ii) Differential Geometry/ Riemannian Geometry.
Be patient and keep working hard.
(2)Apostdoctor positionis available in2021.
Please contact me directly by email with your CV and certificates/recommendations.
You are welcome to join Geometric Analysis Group at Nanjing University.
Geometric Analysis and Differential Geometry Seminar@NJU:
Each is in general two-hourtalk.
Seeherefor invited lectures in Spring 2019, and the previous lectures:Fall 2018,Spring2018,Fall 2017.


Summer 2020 Online Talks on Partial Differential Equations@NJU:
See here for online talks.
Working seminar：
Fall 2020: Every Saturday 2 pm-5 pm,Room 1105 Minwei Meng Building.
Fall 2019: Every Saturday 2 pm-5 pm,Room 1105 Minwei Meng Building.
Spring 2019: Every Saturday 2 pm-5 pm,Room 1105 Minwei Meng Building.
Fall 2018: Every Saturday 2 pm-5 pm from March 17,Room 1105 Minwei Meng Building.
Spring 2018: Every Saturday 2 pm-5 pm from March 17,Room 1105 Minwei Meng Building.
Fall 2017: Every Saturday 2 pm-5 pm from September 19 2017, Room 1105 Minwei Meng Building.
Spring 2017: Every Saturday 2 pm-5 pm, Room 1105 Minwei Meng Building.


Academic Visiting Experience:
20th Feb. 2009 — 5th Apr. 2009 Visiting (Ph. D.) graduate student, Department of Mathematics, National University of Singapore, Singapore
5th Jan. 2011 — 8th Mar. 2011 Visiting scholar, Department of Mathematics, National University of Singapore, Singapore
19th Jan. 2012 — 18th Feb. 2012 Visiting scholar, Simons Center of Geometry and Physics, Stony Brook University, New York, USA
1st Apr. 2012 —30th April 2012 Visiting scholar, Department of Mathematics, National University of Singapore, Singapore
1st July 2012 —14th July 2012 Participant, AMSI/ANU/UQ Winter School, School of Mathematics and Physics, The University of Queensland Brisbane, Australia
21st Aug. 2013 — 19th Sep. 2013 Visiting scholar, Department of Mathematics, National University of Singapore, Singapore
8th Jan. 2014 — 16th Feb. 2014 Visiting scholar, Morningside Center of Mathematics, Chinese Academy of Sciences, China
28th July 2014 — 25th Aug. 2014 Visiting scholar, Department of Mathematics, National University of Singapore, Singapore
24th Nov. 2014 — 20th Dec. 2014 Visiting scholar, Program on scalar curvature in manifold topology and conformal geometry, Institute of Mathematical Sciences, National University of Singapore, Singapore
4thSep. 2015 — 29thAug. 2016 Visiting scholar, Department of Mathematics, Rutgers University, USA
20th Jan. 2017 — 18th Feb. 2017 Visiting scholar, Department of Mathematics, Rutgers University, USA
27th May 2017— 3rdJune2017 Visiting scholar, Department of Mathematics, Sogang University, Korea
30th Sep.2017— 7thOct.2017 Visiting scholar, Department of Mathematics, Sogang University, Korea
24th Jan. 2018— 14th Feb. 2018 Visiting scholar, Department of Mathematics, Rutgers University, USA
29th Apr.2018— 6th May2018 Visiting scholar, Department of Mathematics, Sogang University, Korea
15th July2018— 11th Aug.2018 Visiting scholar, Department of Mathematics, Princeton University, USA
26th Jan. 2019 — 1st Feb. 2019 Visiting scholar, Department of Mathematics, Rutgers University, USA
1st Feb. 2019 — 23th Feb.2019 Visiting scholar, Department of Mathematics, Princeton University, USA
7th July 2019 — 14th July 2019 Visiting scholar, Department of Mathematics, The Hong Kong University of Science and Technology, Hong Kong
1st Aug. 2019 — 16th Aug. 2019 Visiting scholar, Department of Mathematics, Rutgers University, USA
2nd Oct.2019 — 8th Oct. 2019 Visiting scholar, Department of Mathematics, Sogang University, Korea
31st Jan. 2020 — 23rd Feb. 2020 Visiting scholar, Department of Mathematics, Rutgers University, USA



个人主页
链接��
教育经历
Education:
Sep. 2007—June 2011 Doctoral degree, Department of Mathematics & IMS, Nanjing University, P. R. China
Sep. 2002—July 2004 Master degree, Institute of Mathematical Science, Jilin University, P. R. China
Sep. 1998—July 2002 Undergraduate degree, School of Mathematical Science, Jilin University, P. R. China



工作经历
Work Experience:
July 2004—Oct. 2011 Assistant, Department of Applied Mathematics, Nanjing University of Science & Technology, P. R. China
Apr. 2011—Mar. 2013 Post-doctor, Beijing International Center for Mathematical Research, Peking University, P. R. China
Feb. 2012— Dec. 2018 Associate professor, Department of Mathematics, Nanjing University, P. R. China
Jan. 2019— present Professor, Department of Mathematics, Nanjing University, P. R. China

研究兴趣
Geometric Analysis and Partial Differential Equations

学术兼职

学术奖励
100 National Excellent Doctoral Dissertations in China, Ministry of Education of China, 2013
New Century Excellent Talents in University, Ministry of Education of China, 2013
The 5th Jiangsu Award for Outstanding Achievements in Mathematics, Jiangsu MathematicalSociety,2017
Du Xia Award for Excellent in the Teaching of Mathematics for Undergraduates, Nanjing University, 2020
Research and TravelGrants:
Jan. 2018—Dec. 2021 Principal Investigator, Constant scalarcurvature and constant mean curvature problem and its related conformal geometric flows,Natural Science Foundation of China(No. **)
July2017—June2020Principal Investigator, the Start-up Grant of 2016 Deng Feng Program B, Nanjing University
Ky and Yu Fen Fan Fund Travel Grant from the AMS for the year 2015-2016, 2015
Awardee of Hwa Ying Foundation from Nanjing University for academic visit in the year 2015-2016, 2014
Jan. 2014—Dec. 2018 Principal Investigator, Nonlocal Q-curvature flow and the construction of type II blowup solutions to bi-harmonic heat equation with critical exponent,Foundation for the Author of National Excellent Doctoral Dissertation of China (No. 201417),Ministry of Education of China
Jan. 2013—Dec. 2015 Principal Investigator, Partial differential equations in conformal geometry and liquid crystals,Natural Science Foundation of China (No.**)
Oct. 2011—Mar. 2013 Principal Investigator, Curvature flows in conformal geometry,China Postdoctoral Science Foundation



论文
Preprints:
1.Xuezhang Chenand Pak Tung Ho, Q-curvature solitons,preprint (2015), 25 pp.
2.Xuezhang Chen,MijiaLai and Fang Wang,The Obata equation with Robin boundary condition,preprint (2019), to appear inRev. Mat. Iberoam.,arXiv:1901.02206.
3.Xuezhang Chen, Pak Tung Ho and JingangXiong, A fractional conformal curvature flow on the unit sphere, preprint (2019), 62 pp,arXiv:1906.08434.
4.Xuezhang Chen, Mingxiang Li, Zirui Li and Xingwang Xu, OnGaussian curvature flow, preprint (2020), 54 pp.


Publications:
1.Xuezhang Chenand Xingwang Xu, $Q$-curvature flow on the standard sphere of even dimension,J. Funct. Anal. 261 (2011), 934-980.
2.Xuezhang Chenand Xingwang Xu, The scalar curvature flow on $S^n$---perturbation theorem revisited,Invent. Math. 187 (2012), no. 2, 395-506; (with anerratum:Invent. Math. 187(2012), no. 2, 507-509).
3.Xuezhang Chen, Li Ma and Xingwang Xu, Remarks on the $Q$-curvature flow (in Chinese),Sci. Sin. Math. 44 (2014), 183-192. (An English version also appeared inarXiv:1312.5909).
4.Xuezhang Chenand Pak Tung Ho,Conformal curvature flows on acompact manifold of negative Yamabe constant,Indiana Univ. Math. J.67No. 2 (2018), 537–581.
5.Xuezhang Chenand Fei Hou, Remarks on GJMS operator of order six,Pacific J. Math.289(2017),no. 1,35–70.
6.Xuezhang Chen, Pak Tung Ho and Liming Sun,Prescribed scalar curvature plus mean curvature flows in compact manifolds with boundary of negative conformal invariant,Ann Global Anal Geom 53 (2018),121–150.See alsoarXiv:1605.01719.
7.Xuezhang Chenand Liming Sun, Existence of conformal metrics with constant scalar curvature and constant boundary mean curvature on compact manifolds,Commun. Contemp. Math.21(2019),no. 3,**, 51 pp. See alsoarXiv:1611.00229.
8.Xuezhang Chen,MijiaLai and Fang Wang, Escobar-Yamabe compactifications for Poincare-Einstein manifolds and rigidity theorems,Adv. Math. 343 (2019), 16-35.See alsoarXiv:1712.02540.
9.Xuezhang Chen,Yuping Ruan and Liming Sun,The Han-Li conjecture in constant scalar curvature and constant boundary mean curvature problem on compact manifolds, Adv. Math. 358 (2019), 106854, 56 pp,see alsoarXiv:1805.09597.
10.Xuezhang Chen,Tianling Jin and Yuping Ruan,An existence theorem on the isoperimetric ratio over scalar-flat conformal classes,J. Differential Equations 269 (2020), no. 5, 4116–4136.See alsoarXiv:1910.01512.
11.Xuezhang Chenand Nan Wu, Blow-up phenomena for the constant scalar curvature and constant boundary mean curvature equation,J. Differential Equations 269 (2020), no. 11, 9432–9470.See alsoarXiv:1908.04815.



其他
Organized Conferences and mini-courses:
2017 Nanjing Workshop on Geometric Analysis for Younger Researchers, Nov. 25-26, 2017.
Mini-workshop on Geometric Analysis and Partial Differential Equations, June 23, 2018.
Winter Workshop on Geometric Analysis, Nov.17-18, 2018.
Winter Workshop on Geometric Analysis, Nov. 30-Dec. 1, 2019.
Mini-course by Professor Yanyan Li: The method of moving planes, September 23,25,28, 2020;herefor lecture notes.