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Recent news

2025

Since 2021 Fall we (with Meng Chen, Zhi Jiang, Jingjun Han) are organizing a weekly seminar on explicit birational geometry.
12.5-12.6: we (with Guodu Chen, Yun Gao, Yong Hu) are organizing 2025 Workshop on Algebraic Geometry at SJTU.
7.17: Our paper "The Noether inequality for threefolds and three moduli spaces with minimal volumes" (originally entitled "On moduli spaces of canonical threefolds with small genera and minimal volumes") was accepted by PLMS.
7.13-7.20: I visited Colorado State University to attend a conference.
6.30-7.11: We had a summer school at SCMS.
6.20-6.22: I visited WHU to attend a conference and to give a talk.
6.9-6.11: I visited SUSTech to attend a conference and to give a talk.
6.7-6.8: I visited Westlake University.
6.6: I visited SIMIS to give a talk.
6.1: I visited ECNU to attend a conference.
5.28-5.30: I visited PKU to attend a conference and to give a talk.
5.27: We posted a new preprint "An effective upper bound for Fano indices of canonical Fano threefolds, I" (with H. Liu), arXiv:2505.19541.
5.23-5.24: I visited USTC to attend a conference and to give a talk.
4.27: Our paper "An upper bound for polynomial volume growth of automorphisms of zero entropy" was accepted by Peking Math. J.
4.3: Our paper "Stability of syzygy bundles on varieties of Picard number one" was accepted by IMRN.
4.1: Our paper "Decomposing birational morphisms between smooth threefolds: the Picard number two case" was accepted by Taiwannese J. Math..
3.25: Our paper "Total Cartier index of a bounded family" was accepted by PAMQ.
1.28: We posted a new preprint "Optimal upper bound for degrees of canonical Fano threefolds of Picard number one" (with H. Liu, J. Liu), arXiv:2501.16632.

2024

12.3: We posted a new preprint "Stability of syzygy bundles on varieties of Picard number one" (with P. Ren), arXiv:2412.00476.
11.15-11.17: I visited Shangdong U to attend a conference and to give a talk.
10.25-10.27: I visited ShanghaiTech to attend a conference.
10.6-10.8: We organized a workshop at Chongqing.
9.26-9.29: We organized a workshop at SCMS.
9.19-9.22: I visited USTC to attend a conference and to give a talk.
9.13: We posted a new preprint "Effective nonvanishing for weighted complete intersections of codimension two" (with P. Yu), arXiv:2409.07828. It is the first publication of my Ph.D. student Puyang Yu. It was accepted by Kyoto J. Math.
2024 Fall semester: I will teach Birational Geometry.
2024 Fall semester: I will teach Advanced Linear Algebra.
8.28: We posted a new preprint "An upper bound for polynomial volume growth of automorphisms of zero entropy" (with F. Hu), arXiv:2408.15804.
8.26-8.30: We organized a workshop at SCMS.
7.18-7.24: We had a summer school at SCMS.
7.14-7.17: I visited Shangdong U (Weihai) to attend the National AG conference.
7.2: We posted a new preprint "On moduli spaces of canonical threefolds with small genera and minimal volumes" (with M. Chen, Y. Hu), arXiv:2407.01276.
5.31-6.3: I visited SYSU to attend a workshop and to give a lecture.
5.27-5.31: We orgainzed a reading workshop at Fudan.
5.25: Our paper "On numerically trivial automorphisms of compact hyperkähler manifolds of dimension 4" was accepted by MRL.
5.22-5.24: I visited Tsinghua to attend a workshop.
5.13-5.16: I visited CNU to give a lecture series.
4.20-4.26: I visited CAS to attend a workshop.
4.12-4.13: I visited USTC Shanghai Institute for Advanced Studies to attend a workshop and gave a talk.
3.29: Our paper "On the bicanonical map of algebraic threefolds of general type" was accepted by Acta Math. Sin. (Engl. Ser.).
3.14-3.18: I visited Wuhan University to attend a workshop and gave a talk.
2024 Spring semester: I will teach Advanced Linear Algebra together with Yang Zhou.
2.18-2.24: I visited Xiamen University.
1.30: Our paper "An effective upper bound for anti-canonical volumes of singular Fano threefolds" was accepted by J. Inst. Math. Jussieu.
1.9-1.19: I planned to visit San Diego and Tokyo but cancelled due to some personal issue.
1.2-1.4: I attended (partially) ICCM at Shanghai and gave a talk.

2023

Since 2021 Fall we (with Guodu Chen, Jingjun Han, Wenfei Liu, Chuanhao Wei) are organizing a weekly online reading seminar on birational geometry.
12.22-12.26: I visited Dalian for a conference and gave a talk.
12.21: I visited Shenyang for a talk.
11.26-12.2: I visited Tokyo for a workshop (Oguiso 60).
11.22-11.25: I visited Beijing for a workshop at CNU and gave a talk.
11.15-11.19: I visited Quanzhou for a workshop and gave a talk.
11.14: Our paper "Birational boundedness of rationally connected log Calabi--Yau pairs with fixed index" was accepted by Algebr. Geom. Phys..
11.6-11.11: I visited Bonn for a workshop at HIM and gave a talk.
10.27: Our paper "Miyaoka type inequality for terminal threefolds with nef anti-canonical divisors" was accepted by Sci China Math.
10.23-10.29: I visited New York for a workshop at Simons Foundation and gave a talk.
9.4-9.6: I visited Hangzhou (IASM-Banff) for a workshop.
2023 Fall semester: I will teach Advanced Linear Algebra together with Jingjun Han.
8.27: We posted a new preprint "On numerically trivial automorphisms of compact hyperkähler manifolds of dimension 4" (with W. Liu), arXiv:2308.03394.
8.20-8.31: I visited NUS for a workshop and gave a talk.
8.19: Our paper "Algebraic reverse Khovanskii--Teissier inequality via Okounkov bodies" was accepted by Math Zeit.
8.11: I finished the translation of Kawamata's book and submitted to the publisher.
8.8-8.16: I visited Wuhan U for a summer school and a workshop.
7.31: Our paper "On the anti-canonical geometry of weak Q-fano threefolds, III" was accepted by Nagoya Math J.
7.10-7.21: We had a summer school (K-stability, Derived categories and P=W) at SCMS.
6.28-6.29: I visited Tsinghua to attend a reading seminar on Birkar's paper
6.1-6.6: I visited CQUT.
5.31: We posted a new preprint "On the bicanonical map of algebraic threefolds of general type" (with M. Chen, J. Yan), arXiv:2305.19960.
5.27-5.28: I attended a workshop at Tongji.
5.17-5.23: I visited Wenfei Liu at XMU.
5.3-5.12: I visited Fei Hu at NJU and attended a conference to give a talk.
4.26: I visited Kewei Zhang at BNU to give a seminar talk.
4.25-4.28: I visited Zhiyu Tian at PKU to give a seminar talk.
4.21-4.23: I am organizing a workshop at Fudan with Meng Chen.
4.13: We posted a new preprint "An effective upper bound for anti-canonical volumes of singular Fano threefolds" (with Y. Zou), arXiv:2304.06347.
4.7-4.9: I visited SUSTech to attend a workshop.
3.17: I got promoted as an associate professor (tenured).
3.2-3.5: I visited Westlake U and give a talk.
3.2: We posted a new preprint "Miyaoka type inequality for terminal threefolds with nef anti-canonical divisors" (with L. Liu), arXiv:2303.00268.
2023 Spring semester: I will teach Advanced Linear Algebra together with Jun Li and Yang Zhou and Tianyu Wang.
2023 Spring semester: I will teach Birational Geometry together with Jingjun Han.
2023 Spring semester: I will teach Higher Dimensional Algebraic Varieties together with Meng Chen.
2.2: Our paper "On numerical dimensions of Calabi--Yau varieties" (with L. Wang) was accepted by IMRN.
2.1 & 2.3: I gave a series online talk at Tshinghua.
1.11: I gave an online talk at Beijing Guangzhou Algebraic Geometry Symposium.
1.10: I gave an online talk at East Asia Core Doctoral Forum in Mathematics.

Past news

2022

12.17-12.18: I attended Shanghai Algebra Geometry Conference 2022 at ECNU and gave a talk.
12.13: I visited ShanghaiTech University and gave a talk at Colloquium.
11.26: I gave an online talk at 2022 Suzhou AG workshop.
9.26-10.31: I gave a short course (online) at SJTU on Introduction to the minimal model program, on each Monday.
9.1: I had a new Ph.D. student (Ziqi Liu) from TJU.
2022 Fall semester: I served as a mentor of Independent Study.
2022 Fall semester: I had student seminar on WED morning (senior) and THU afternoon (junior).
2022 Fall semester: I taught Advanced Linear Algebra together with Jun Li and Yang Zhou.
8.9-8.19, we organized a graduate summer school at SCMS and I will give a series lecture on linear systems on K3 and HK.
8.2: We posted a new preprint "On numerical dimensions of Calabi--Yau varieties" (with L. Wang), arXiv:2208.00654.
7.18-7.22, we organized the 3rd National Algebraic Geometry Conference at Fudan University (organized with Meng Chen, Jingjun Han, Zhi Jiang, Jun Li, Zhiyuan Li).
7.8: I gave an online talk at AG seminar at Nottingham. (It was rescheduled from 6.30, because I miscalculate the time difference and did not show up in the seminar at the scheduled time)
7.6: I submitted the paper "Characterizing terminal Fano threefolds with the smallest anti-canonical volume, II" the special volume in honor of Professor Shokurov's seventieth birthday.
6.15: I gave an online talk at Conference on Geometry and Analysis 2022 at USTC.
6.12: I gave an online talk at China Southeastern Algebraic Geometry Symposium (II) at SYSU.
5.4: I gave an online talk at JAMI2022 at JHU.
4.25: Our paper "Shokurov's conjecture on conic bundles with canonical singularities" was accepted by Forum Math. Sigma.
4.22: Our paper "On minimal varieties growing from quasismooth weighted hypersurfaces" was accepted by J. Differential Geom.
4.11: I gave an online talk at AG seminar at SJTU.
4.11: We posted a new preprint "Birational boundedness of rationally connected log Calabi--Yau pairs with fixed index" (with J. Han), arXiv:2204.04946
3.29: Our paper "An effective upper bound for anti-canonical volumes of canonical Q-Fano threefolds" was accepted by IMRN.
3.17: Our young AG-NT group (leading by Zhi Jiang) got supported by School of Mathematical Sciences of Fudan University.
3.11: I got a second prize in a teaching competition for young teachers at Fudan University in 2021.
2022 Spring semester: I taught Advanced Linear Algebra together with Jun Li.
2022 Spring semester: I served as a mentor of Independent Study.
1.27: We posted a new preprint "On the anti-canonical geometry of weak Q-fano threefolds, III" (with Y. Zou), arXiv:2201.11814
1.1: Our AG group (leading by Meng Chen) got supported by NSFC for Innovative Research Groups.

2021

11.27-11.28(POSTPONED): we (with Meng Chen) are organing "2021 Workshop on Explicit Birational Geometry" at Fudan University.
12.23: My paper "Positivity of Riemann-Roch polynomials and Todd classes of hyperkähler manifolds" was accepted by JAG.
12.17: I gave a talk (togethor with Z. Li) at AG seminar at AMSS.
12.7: I posted a new preprint "Algebraic reverse Khovanskii--Teissier inequality via Okounkov bodies" (with Z. Li), arXiv:2112.02847
11.28: I gave an online talk at AG workshop at Tongji University.
10.11-10.15: I attended online workshop "Interactions of new trends in Algebraic Geometry and singularities" supported by OIST and RIMS and gave a talk.
10.8: I gave an online talk at RIKEN.
9.9: I posted the paper "Characterizing terminal Fano threefolds with the smallest anti-canonical volume" on arXiv (contributed to Moscow-Shanghai-Pohang conference proceeding).
9.9: I gave an online talk at NCTS.
9.2: I gave an online talk at YMSC.
9.1: I had a new Ph.D. student (Puyang Yu) from USTC.
2021 Fall semester: I taught Advanced Linear Algebra together with Jun Li.
2021 Fall semester: I served as a mentor of Independent Study.
8.24: I gave an online talk at AMSS on introduction to generalized pairs.
8.16-8.24: we (with Jingjun Han) organized an reading workshop at Fudan, but due to recent COVID-19 situation, we decided to hold it online.
7.27: I gave an online talk for undergraduates on birational geometry (which was not so successful).
7.26: I gave an online talk at Osaka U.
7.19-7.23: I gave a series lecture on MMP at SCMS.
7.16: I contributed a paper "Characterizing Q-Fano threefolds with the smallest anti-canonical volume" to Moscow-Shanghai-Pohang conference proceeding.
7.4-7.17: I gave a series lecture on MMP at XMU.
7.2: I posted a new preprint "An effective upper bound for anti-canonical volumes of canonical Q-Fano threefolds" (with Y. Zou), arXiv:2107.01037
6.25: I gave an online talk at KIAS.
6.17-6.23: I visited CNU and AMSS, and gave a talk at AMSS.
5.19-5.21: I visited CQUT and gave a talk.
4.30: I posted a new preprint "Shokurov's conjecture on conic bundles with canonical singularities" (with J. Han, Y. Luo), arXiv:2104.15072
3.23: I gave an online talk at Princeton.
2021 Spring semester: I gave lectures for preparing Colledge Contest and Yau Contest for undergraduate students.
2021 Spring semester: I was in charge of Advanced Linear Algebra seminar for undergraduate students.
2021 Spring semester: I taught Advanced Linear Algebra together with Jun Li.
1.21: I gave an online talk at IMJ-PRG.

2020

12.26-12.29: I visited USTC to attend ICCM annual meeting and gave a talk.
12.8-12.23: I visited AMSS to give a series lectures on boundedness of Fano varieties.
12.3: Our paper "Birational boundedness of rationally connected Calabi-Yau threefolds" was accepted by Advances in Math.
12.1: Our AG group (leading by Jun Li) got supported by National Key Research and Development Program of China.
11.27-11.28: I organized "Frontier Forum on Algebraic Geometry and Related Area" at Fudan with Meng Chen.
11.13-11.15: I visited SUSTEch to attend "Foliations and vector bundles".
9.12: Our paper "Boundedness of log pluricanonical representations of log Calabi-Yau pairs in dimension 2"; was accepted by Algebra Number Theory
2020 Fall semester: I taught Advanced Linear Algebra together with Jun Li.
8.28: I gave a talk in ICCM lecture of Geometry.
8.11: I posted a new preprint "Positivity of Riemann-Roch polynomials and Todd classes of hyperkähler manifolds", arXiv:2008.04685
7.20-7.31: We organized AG summer school for undergraduate, I taught Commutative Algebra.
5.19: We posted a new preprint "On minimal varieties growing from quasismooth weighted hypersurfaces" (with M. Chen and B. Li) arXiv:2005.09828.
5.15: I gave a talk at online Noon seminar of Fudan.
5.8: I gave a talk at online AG seminar of Nanjing University.
5.5: I gave a talk at ZAG online seminar.
2020 Spring semester: we organized Fudan-SCMS AG seminar online every Thursday (Fudan-SCMS AG seminar)
2020 Spring semester: I was in charge of Advanced Linear Algebra seminar for undergraduate students.
2020 Spring semester: I gave exercise courses for Advanced Linear Algebra taught by Jun Li.
2.27: We posted a new preprint "Boundedness of log pluricanonical representations of log Calabi-Yau pairs in dimension 2″ (with H. Liu) arXiv:2002.11928.
(CANCELLED)3.15-3.29: I will visit JHU for JAMI2020.
(CANCELLED)2.22-2.26: I will visit Haoyu Hu at NJU.
(CANCELLED)2.10-2.14: I will visit NUS for a workshop.
1.5-1.11: I visited AIM for "K-stability and related topics".

2019

12.19: My paper "A gap theorem for minimal log discrepancies of non-canonical singularities in dimension three" was accepted by JAG.
11.24-12.1: I visited Xiamen to give a lecture series and for a conference.
11.17-11.23: I visited IBS-CGP for "Birational Geometry, Kaehler-Einstein metrics and Degenerations" and gave a talk.
10.29: Our paper "Remarks on Kawamata's effective non-vanishing conjecture for manifolds with trivial first Chern classes" was accepted by Math. Z.
10.20: Our paper "On the anti-canonical geometry of weak Q-fano threefolds, II" was accepted by AIF.
10.17-10.20: I visited Suzhou for "Suzhou AG Young Forum" and gave a talk.
10.13: Our paper "The Noether inequality for algebraic threefolds" was accepted by Duke.
10.9-10.12: I visited KAIST for "Fudan-KAIST joint Workshop on Algebra and Geometry" and give a talk.
9.1-9.4: I visited BICMR for "“PKU-KUL Joint Algebraic Geometry Workshop".
2019 Fall semester: we organized a reading seminar on MMP in char p.
2019 Fall semester: I taught Higher Dimensional Algebraic Varieties for graduate students.
8.20-8.26: I visited AMSS.
8.4-8.9: I attended "Conference on algebraic and arithmetic geometry" at Sanya and give a talk.
7.29-8.2: I attended "Workshop on Algebraic Geometry" at Fudan and give a talk on 7.29.
7.24-8.4: Jingjun Han visited SCMS and give a seminar talk.
7.10-7.13: Shihoko Ishii visited SCMS and give a seminar talk.
7.1-7.5: I attended "2nd National AG Conference" at ECNU and gave a talk on 7.2.
6.10-6.15: I attended "Birational geometry, Kahler-Einstein metrics and degenerations" at ShanghaiTech University.
6.1: I moved to Shanghai Center for Mathematical Sciences as a Young Investigator, after my postdoc in IPMU and MSRI.

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