# Kai Wen Lan Thesis Statements

@Ryan: Questions like that are unlikely to appear on MO because they are readily answerable via the Mathematics Genealogy Project or MathSciNet. The short Ph.D. thesis question is not so easy to answer reliably.

I'm also not sure that I agree with you that a short dissertation is not interesting. It's true that it isn't *necessarily* interesting. However, provided that the dissertation was produced in good faith (as opposed to being a publicity stunt or a mere formality or something), it is about as interesting as a "short proof" is. And don't most of us feel that short proofs are interesting? For example, the short papers listed here (search for "Nelson" to get to the list) are all pretty interesting in my mind. (By the way, note that the "shortest paper" question doesn't have the same urban-legend tendencies because it's much easier to verify the facts.)

But let me state explicitly my main reason for wanting to ask this question on MO: I'm kind of sick of hearing this question asked yet again and having no rebuttal to urban-legendy responses of the form, "So-and-so's dissertation was only epsilon pages long!" where epsilon is a positive real much less than 1. It would be nice to put this question to rest.

Having said all that, I'll refrain from posing the question if a couple other people say they don't like it.

## Academic Information

Research InterestsEmployment/EducationWritingsTalksSeminarsTeachingConferencesMiscellanyMath LinksQuick Links:MNCATMathSciNetJStorNUMDAMArXiv:NT/AG## Research Interests

- Number theory
- Automorphic forms
- Geometry and cohomology of Shimura varieties and their compactifications
- Relations between the above

## Employment and Education

- Associate Professor, School of Mathematics, University of Minnesota, Twin Cities, academic years 2015--now.
- Assistant Professor, School of Mathematics, University of Minnesota, Twin Cities, academic years 2012--2015.
- Veblen Research Instructor, joint position of Department of Mathematics, Princeton University, and School of Mathematics, Institute for Advanced Study, academic years 2008--2012.
- Doctor of Philosophy, Department of Mathematics, Harvard University, academic years 2003--2008. (Advisor: Prof. Richard Taylor.)
- Master of Science, Department of Mathematics, National Taiwan University, academic years 1999--2001. (Advisor: Prof. Ki-Seng Tan.)
- Bachelor of Science, Department of Mathematics, National Taiwan University, academic years 1995--1999.

- Alfred P. Sloan Research Fellowship, academic years 2014--2018.
- NSF Grant DMS-1352216 (CAREER) (PI), academic years 2014--2019.
- NSF Grant DMS-1258962 (PI), academic years 2012--2014.
- NSF Grant DMS-1069154 (PI), academic years 2011--2012.
- NSF Grant DMS-0635607 (through membership at the Institute for Advanced Study) and Qiu Shi Fellowship at the Institute for Advanced Study in Princeton, academic year 2009--2010.
- Clay Liftoff Fellowship, Summer 2008.

## Writings

- Personal notes are not listed. (Some talk slides or notes might be available in the section below on talks.)
- All documents listed, whether linked directly or not, are available upon request (unless otherwise specified). (Joint works might not be linked until I have obtained the approval from the coauthors.)
- Articles described as submitted might have gone through corrections/revisions since the dates of submissions. (The precise dates of submissions/revisions are not recorded here.)
- Please let me know if the links are broken. This should never happen. (I do not take files down when revising them.)
- Please feel free to send me corrections or questions if you notice anything wrong or confusing.

- Logarithmic Riemann--Hilbert correspondences for rigid varieties, with Hansheng Diao, Ruochuan Liu, and Xinwen Zhu, preprint.
*Nearby cycles of automorphic étale sheaves, II*, with Benoît Stroh, to appear in the proceedings of the Conference on the Cohomology of Arithmetic Groups, on the occasion of Joachim Schwermer's 66th birthday.*An example-based introduction to Shimura varieties*, to appear in the proceedings of the ETHZ Summer School on Motives and Complex Multiplication.*Cohomology of automorphic bundles*, to appear in the proceedings of the Seventh International Congress of Chinese Mathematicians.*Algebraic tori as degenerations of abelian varieties*, with Junecue Suh, to appear in Mathematika, doi:10.1112/S0025579317000420.*Compactifications of subschemes of integral models of Shimura varieties*, with Benoît Stroh, submitted.*Nearby cycles of automorphic étale sheaves*, with Benoît Stroh, Compos. Math. 154 (2018), no. 1, pp. 80--119, doi:10.1112/S0010437X1700745X.*Vanishing theorems for coherent automorphic cohomology*, Res. Math. Sci. 3 (2016), article no. 39, 43 pp., doi:10.1186/s40687-016-0085-6. Erratum. (MATLAB codes for computing vanishing degrees available upon request.)*Compactifications of splitting models of PEL-type Shimura varieties*, Trans. Amer. Math. Soc. 370 (2018), no. 4, pp. 2463--2515, doi:10.1090/tran/7088.*Integral models of toroidal compactifications with projective cone decompositions*, IMRN 2017 (2017), no. 11, pp. 3237--3280, doi:10.1093/imrn/rnw123. Errata.*Boundary strata of connected components in positive characteristics*, an appendix to*Families of nearly ordinary Eisenstein series on unitary groups*by Xin Wan, Algebra Number Theory 9 (2015), no. 9, pp. 1955--2054, doi:10.2140/ant.2015.9.1955.*Compactifications of PEL-type Shimura varieties in ramified characteristics*, Forum Math. Sigma 4 (2016), e1, 98 pp., doi:10.1017/fms.2015.31. Errata.*Higher Koecher's principle*, Math. Res. Lett. 23 (2016), no. 1, pp. 163--199, doi:10.4310/MRL.2016.v23.n1.a9.*Relative cohomology of cuspidal forms on PEL-type Shimura varieties*, with Benoît Stroh, Algebra Number Theory 8 (2014), no. 8, pp. 1787--1799, doi:10.2140/ant.2014.8.1787.*On the rigid cohomology of certain Shimura varieties*, with Michael Harris, Richard Taylor, and Jack Thorne, Res. Math. Sci. 3 (2016), article no. 37, 308 pp., doi:10.1186/s40687-016-0078-5, in the Special Collection in Honor of Robert F. Coleman.*Compactifications of PEL-type Shimura varieties and Kuga families with ordinary loci*, World Scientific Publishing Co., Singapore, 2018. (For the preprint version missing the preface, see here.)*Geometric modular forms and the cohomology of torsion automorphic sheaves*, Fifth International Congress of Chinese Mathematicians, AMS/IP Studies in Advanced Mathematics 51 (2012), part 1, pp. 183--208.*Vanishing theorems for torsion automorphic sheaves on general PEL-type Shimura varieties*, with Junecue Suh, Adv. Math. 242 (2013), pp. 228--286, doi:10.1016/j.aim.2013.04.004. Errata.*Dual BGG complexes for automorphic bundles*, with Patrick Polo, to appear in Math. Res. Lett.*Vanishing theorems for torsion automorphic sheaves on compact PEL-type Shimura varieties*, with Junecue Suh, Duke Math. J. 161 (2012), no. 6, pp. 1113--1170, doi:10.1215/00127094-1548452. Errata.*Liftability of mod p cusp forms of parallel weights*, with Junecue Suh, IMRN 2011 (2011), no. 8, pp. 1870--1879, doi:10.1093/imrn/rnq145.*Elevators for degenerations of PEL structures*, Math. Res. Lett. 18 (2011), no. 5, pp. 889--907, doi:10.4310/MRL.2011.v18.n5.a7. Errata.*Comparison between analytic and algebraic constructions of toroidal compactifications of PEL-type Shimura varieties*, J. Reine Angew. Math. 664 (2012), pp. 163--228, doi:10.1515/CRELLE.2011.099. Errata.*Toroidal compactifications of PEL-type Kuga families*, Algebra Number Theory 6 (2012), no. 5, pp. 885--966, doi:10.2140/ant.2012.6.885. Errata.*Arithmetic compactifications of PEL-type Shimura varieties*, London Mathematical Society Monographs, vol. 36, Princeton University Press, Princeton, 2013. Errata.*Arithmetic compactifications of PEL-type Shimura varieties*, Ph.D. thesis, Harvard University, May 20, 2008.- Official double-spaced version submitted to Harvard University (for electronic publication on the ProQuest Dissertations & Theses Database).
- Single-spaced version compiled on May 21, 2008. (Almost identical to the above document.)
- Errata.
- Most recent revision (single-spaced) or (densely-spaced). (Corrections to typos and minor mistakes are incorporated at the time of compilation.)
**WARNING: The numbering of results in these documents are different from the official version.**Nevertheless, it is consistent with that in the book published (see above) in London Mathematical Society Monographs. Please refer to that book.

*Moduli schemes of elliptic curves*, M.S. thesis, National Taiwan University, Jun 15, 2001. (The electronic document for this is no longer available.)

## Talks (Selection)

(Talks given in reading seminars are not listed.)

- Automorphic Forms, Representations of Lie Groups and Several Complex Variables, Academy of Mathematics and Systems Science, Chinese Academy of Sciences, introductory course and plenary lecture, July 4--14, 2018.
- The Joint International Meeting of the Chinese Mathematical Society and the American Mathematical Society, Fudan University, Jun 11--14, 2018.
- Northwestern Number Theory Seminar, May 7, 2018.
*Local systems over Shimura varieties: a comparison between two constructions*,- Arithmetic Geometry and Related Topics, Ehime University, Nov 20--22, 2017.
- Automorphic Forms and Arithmetic Seminar, Columbia University, Oct 13, 2017.
- Automorphic Forms and Representation Theory Seminar, Purdue University, Aug 24, 2017.

*Compactifications of subschemes of integral models of Shimura varieties*:- Workshop on Shimura Varieties, Representation Theory and Related Topics, Kyoto, Nov 25, 2016.
- Number Theory Seminar, Beijing International Center for Mathematical Research, Jan 14, 2016.

*Nearby cycles of automorphic étale sheaves*:- Special Cycles on Shimura Varieties and Iwasawa Theory, Bernoulli Center, EPFL, Aug 29, 2017.
- Johns-Hopkins--University of Maryland Algebra & Number Theory Day, Apr 15, 2017.
- From Number Theory to Arithmetic Geometry, National Taiwan University, Dec 26, 2016.
- Conference on the Cohomology of Arithmetic Groups on the occasion of Joachim Schwermer's 66th birthday, MPI, Bonn, Jun 10, 2016.
- Morningside Center of Mathematics, Academy of Mathematics and Systems Science, Chinese Academy of Sciences, Dec 18, 2015.

*Compactifications of splitting models of PEL-type Shimura varieties*:- 2016 Workshop on Number Theory, Morningside Center of Mathematics, Beijing, Aug 2, 2016.
- Journées arithmétiques à Lyon, June 12, 2015.

*Vanishing theorems for coherent automorphic cohomology*:- Group, Lie and Number Theory Seminar, University of Michigan, Oct 5, 2015.
- Frontiers in Serre's Modularity Conjecture: Torsion and Low Weights, Luxembourg, Jun 18, 2015.
- Arithmetic Geometry and Automorphic Representations, ESI, Vienna, May 20, 2015.
- Lie Theory Seminar, University of Minnesota, Twin Cities, Mar 27 and Apr 3, 2015.

*Higher Koecher's principle*:- Automorphic Forms, Shimura Varieties, Galois Representations and L-Functions (a workshop in honor of Michael Harris), MSRI, Dec 2, 2014. Video
- Stanford/AIM Number Theory Seminar, Nov 7, 2014.
- Lie Theory Seminar, University of Minnesota, Twin Cities, Oct 17 and 24, 2014.
- Pan Asia Number theory (ICM satellite conference), POSTECH, Pohang, South Korea, Aug 8, 2014.

*Compactifications of PEL-type Shimura varieties in ramified characteristics*:- Morningside Center of Mathematics, Academy of Mathematics and Systems Science, Chinese Academy of Sciences, Dec 18, 2015.
*p*-adic Methods in the Theory of Classical Automorphic Forms, CRM, Montréal, Mar 12, 2015.- University of Chicago Number Theory Seminar, Feb 24, 2015.
- Caltech Number Theory Seminar, Jan 15, 2015.
- NCTS/TPE Seminar on Arithmetic Geometry and Representation Theory (at Academia Sinica and National Taiwan University), July 28, 2014.

*An example-based introduction to Shimura varieties and their compactifications*:- Motives and Complex Multiplication, Ascona, Switzerland, minicourse, Aug 15--17, 2016.
- Introductory Workshop: New Geometric Methods in Number Theory and Automorphic Forms, MSRI, 3 lectures, Aug 18--20, 2014. Videos: 123
- NCTS/TPE Seminar on Arithmetic Geometry and Representation Theory (at Academia Sinica and National Taiwan University), July 28, 2014.

*Galois representations for regular algebraic (cuspidal) automorphic forms/representations over CM fields*:- Number Theory--Representation Theory Seminar, University of Wisconsin, Madison, Mar 7, 2013.
- Number Theory Seminar, University of North Carolina, Chapel Hill, Mar 5, 2013.
- Arithmetic and Geometry, Hausdorff Trimester Program, Bonn, Jan 31 and Feb 1, 2013.
- Stanford/AIM Number Theory Seminar, Jan 18, 2013.
- University of Chicago Number Theory Seminar, Oct 9, 2012.
- Lie Theory Seminar, University of Minnesota, Twin Cities, Oct 5 and 12, 2012.
- NCTS/TPE Seminar on Arithmetic Geometry (at National Taiwan University), Aug 9, 2012.
- Workshop on the Arithmetic Geometry of Shimura Varieties, Representation Theory, and Related Topics, Sapporo, Jul 21, 2012.

*Compactifications of PEL-type Shimura varieties and Kuga families with ordinary loci*:- Arithmetic Algebraic Geometry, Paderborn, Oct 11, 2013.
- NCTS Seminar on Arithmetic Geometry and Representation Theory (at Academia Sinica and National Taiwan University), 8 lectures, Jul 23, 25, 29, and 31, 2013.
- International Congress of Chinese Mathematicians, Taipei, Jul 16, 2013.
*p*-adic Modular Forms, L-functions, and Galois representations, UCLA, May 11, 2013.- Higher Rank Automorphic Forms and L-functions, University of Warwick, May 2, 2013.
- Northwestern Number Theory Seminar, Apr 22, 2013.
- Princeton University / IAS Number Theory Seminar, Feb 21, 2013.
- Algebra Seminar, Michigan State University, Oct 31, 2012.
- NCTS/TPE Seminar on Arithmetic Geometry (at National Taiwan University), Aug 9, 2012.
- Seminar on Arithmetic Geometry (organized by Prof. Iku Nakamura), Hokkaido University, 2 lectures, Jul 30, 2012; continuation of the following workshop lecture.
- Workshop on the Arithmetic Geometry of Shimura Varieties, Representation Theory, and Related Topics, Sapporo, Jul 19, 2012.
- Workshop on Arithmetic Geometry and Representation Theory, HKUST IAS, Hong Kong, Dec 28, 2011.

*Kodaira-type vanishing on good reduction fibers of Shimura varieties*:- Workshop on the Arithmetic Geometry of Shimura Varieties and Rapoport-Zink Spaces, Kyoto University, Jul 8, 2011.
- NCTS Number Theory Seminar, Hsinchu, Taiwan, Jun 28, 2011.
- Caltech Number Theory Seminar, May 31, 2011.

*Geometric modular forms in higher dimensions*:- Colloquium, UC Santa Cruz, May 9, 2017.
- Colloquium, Cornell University, Feb 8, 2011.
- Special Colloquium, UC Irvine, Jan 18, 2011.
- Colloquium, McMaster University, Jan 10, 2011.
- Colloquium, University of Minnesota, Twin Cities, Dec 7, 2010.
- Colloquium, Boston College, Nov 30, 2010.

*Vanishing theorems for torsion automorphic sheaves*(*on general PEL-type Shimura varieties*):- Seminar on Arithmetic Geometry (organized by Prof. Iku Nakamura), Hokkaido University, 2 lectures, July 17, 2012.
- Workshop on Cohomology of Shimura Varieties: Arithmetic Aspects and The Construction of Galois Representations, Fields Institute, Mar 23, 2012.
- Quebec-Vermont Number Theory Seminar, Feb 2, 2012.
- 2011 NCTS International Conference on Galois Representations, Automorphic Forms and Shimura Varieties, Hsinchu, Taiwan, Jun 20, 2011.
- Caltech Number Theory Seminar, May 26, 2011.
- Automorphic Forms and Representation Theory Seminar, Purdue University, Mar 31, 2011.
- Workshop on Automorphic Forms and Shimura Varieties, Columbia University, Mar 19, 2011.
- Boston University Number Theory Seminar, Jan 28, 2011.
- Lie Groups and Representation Theory Seminar, University of Maryland, Jan 26, 2011.
- International Congress of Chinese Mathematicians, Tsinghua University, Beijing, Dec 19, 2010.
- Galois Representations and Automorphic Forms Seminar, Institute for Advanced Study, Dec 9, 2010.
- Bay Area Algebraic Number Theory and Arithmetic Geometry Day I (special day of Stanford/AIM Number Theory Seminar), Nov 6, 2010.
- BC-MIT Number Theory Seminar, Sep 21, 2010.
- Number Theory Seminar, Academia Sinica, Jul 20, 2010; continuation of the following workshop lecture.
- Workshop on Arithmetic Geometry and Related Topics, Taipei, Jul 14, 2010.
- University of Chicago Number Theory Seminar, Apr 9, 2010.
- Members Seminar, Institute for Advanced Study, Apr 5, 2010.

*Liftability of mod p cusp forms of regular weights*, GCOENumber Theory Joint Seminar, Kyoto University, Dec 4, 2009.*Vanishing theorems for torsion automorphic sheaves*(*on compact PEL-type Shimura varieties*):- Northwestern Number Theory Seminar, Feb 22, 2010.
- Number Theory / Representation Theory Seminar, University of Toronto, Jan 27, 2010.
- Workshop on Arithmetic Geometry in Kanazawa, Nov 24, 2009.

*Analytic coordinates for degenerations of PEL structures*, NCTS/TPE (at National Taiwan University), Aug 3, 6, and 10, 2009.*Elevators for degenerations of PEL structures*, Workshop on Automorphic Representations, Geometry, and Arithmetic, Taipei, Jul 22, 2009.- Cohomology of automorphic bundles / Coherent cohomology of automorphic bundles:
- International Congress of Chinese Mathematicians, Beijing, Aug 8, 2016.
- Number Theory Seminar, Beijing International Center for Mathematical Research, 4 lectures, Dec 15, 16, 21, and 23, 2015.
- Short Talks by Postdoctoral Members, Institute for Advanced Study, Sep 29, 2009.
- Mini-course at NCTS/TPE (at National Taiwan University), Dec 16, 24, and 30, 2008.

*Toroidal compactifications of certain Kuga families*/*Extensions (of various structures) over toroidal boundaries of Shimura varieties*:- Stanford/AIM Number Theory Seminar, May 8, 2009.
- Princeton University / IAS Number Theory Seminar, Apr 23, 2009.
- Algebra and Number Theory Seminar, University of Maryland, Feb 16, 2009.
- Algebra Seminar, University of Pennsylvania, Feb 2, 2009.
- Workshop on Shimura Varieties, Automorphic Representations and Related Topics, Kyoto, Nov 27, 2008.
- Group, Lie and Number Theory Seminar, University of Michigan, Nov 10, 2008.
- Joint Columbia-CUNY-NYU Number Theory Seminar, Oct 2, 2008.

*Arithmetic compactifications of (general) PEL-type Shimura varieties*:- Shimura Varieties and Trace Formula Seminar, Institute for Advanced Study, Oct 31 and Nov 3, 2008.
- Algebra Seminar, Michigan State University, Apr 15, 2008.
- Number Theory and Representation Theory Seminar, University of Michigan, Apr 14, 2008.
- Number Theory Seminar, Harvard University, Mar 19, 2008.
- Seminar on Automorphic Forms and Galois Representations, Princeton University, Feb 6, 2008.
- Department Colloquium, Indiana University, Feb 1, 2008.
- KIAS (Korea Institute for Advanced Study), 4 lectures, Jan 14--15, 2008.
- Number Theory Seminar, Academia Sinica, 4 lectures, Jan 2--3, 2008.
- Seminar on Arithmetic Geometry (organized by Prof. Iku Nakamura), Hokkaido University, 4 lectures, Aug 28--29, 2007.
- Mini-Workshop on Automorphic Representations and Shimura Varieties, Kyoto, May 31, 2007. (Full-day informal seminar, May 29, 2007.)
- Algebraic Geometry Seminar, NCTS/TPE (at National Taiwan University), Jan 2, 2007.

*Arithmetic compactifications of Shimura varieties associated to certain unitary groups*:- Caltech Number Theory Seminar, Sep 7, 2006.
- Lecture series, National Taiwan University, May 23 and 30, and Jun 6, 2006.

## Seminars

Weekly scheduleRegular Seminars:

Reading Seminars:

## Teaching

- University of Minnesota, Twin Cities:
- Math 8254: Algebraic Geometry, Spring 2019.
- Math 8253: Algebraic Geometry, Fall 2018.
- Math 8272: Lie Groups and Lie Algebras, Spring 2018.
- Math 8271: Lie Groups and Lie Algebras, Fall 2017.
- Math 8272: Lie Groups and Lie Algebras, Spring 2017.
- Math 8271: Lie Groups and Lie Algebras, Fall 2016.
- Math 8280: Topics in Number Theory: Automorphic and Galois Representations, Spring 2016 (section 001) (with a reading seminar).
- Math 8270: Topics in Algebraic Geometry: Abelian Schemes and Their Moduli, Spring 2015 (with a reading seminar).
- Math 8254: Algebraic Geometry, Spring 2014.
- Math 8253: Algebraic Geometry, Fall 2013.
- Math 4242: Applied Linear Algebra, Fall 2012 (sections 010 and 060).
- REU/UROP/URS/Honors Thesis/Senior Project: Feel free to contact me if you are interested.
- MathCEP/UMTYMP.

- Princeton University:
- MAT 204: Advanced Linear Algebra with Applications, Spring 2012 (coursehead).
- MAT 203: Advanced Multivariable Calculus, Fall 2011 (2 sections).
- MAT 203: Advanced Multivariable Calculus, Spring 2011 (1 section and 1 review, coursehead).
- MAT 203: Advanced Multivariable Calculus, Fall 2010 (2 sections).
- MAT 202: Linear Algebra With Applications, Spring 2009 (2 sections).
- MAT 203: Advanced Multivariable Calculus, Fall 2008 (2 sections).

- Harvard University:
- Math 21a: Multivariable Calculus, Spring 2008 (2 sections).
- Math 21a: Multivariable Calculus, Fall 2006.
- Math 21a: Multivariable Calculus, Fall 2005.
- Math 99r: Tutorial on
*Binary Quadratic Forms*(with Chung Pang Mok), Fall 2005. - Math 21a: Multivariable Calculus, Fall 2004.

- National Taiwan University: Differential Geometry (as a teaching assistant), Fall 2000.

## Conferences / Special Programs (Selection)

- Arithmetic of Shimura Varieties, Oberwolfach, Jan 13--19, 2019.
- Automorphic Forms, Representations of Lie Groups and Several Complex Variables, Academy of Mathematics and Systems Science, Chinese Academy of Sciences, Jul 4--14, 2018.
- The Joint International Meeting of the Chinese Mathematical Society and the American Mathematical Society, Fudan University, Jun 11--14, 2018.
- Mathematics is a long conversation: a celebration of Barry Mazur, Harvard University, Jun 4--8, 2018.
- Arithmetic Geometry and Related Topics, Ehime University, Nov 20--22, 2017.
- Special Cycles on Shimura Varieties and Iwasawa Theory, Bernoulli Center, EPFL, Aug 28--Sep 1, 2017.
- Local Cohomology in Commutative Algebra and Algebraic Geometry, on the occasion of Gennady Lyubeznik's 60th birthday, University of Minnesota, Aug 7--11, 2017.
- P-adic Hodge Theory and Automorphic Forms, Beijing International Center for Mathematical Research, Jun 5--9, 2017.
- Arizona Winter School on
*Perfectoid Spaces*, Tucson, Mar 11--15, 2017. - From Number Theory to Arithmetic Geometry, National Taiwan University, Dec 26, 27, and 30, 2016.
- Workshop on Shimura Varieties, Representation Theory and Related Topics, Kyoto, Nov 21--25, 2016.
- Motives and Complex Multiplication, Ascona, Switzerland, Aug 15--19, 2016.
- International Congress of Chinese Mathematicians, Beijing, Aug 6--11, 2016.
- 2016 Workshop on Number Theory, Morningside Center of Mathematics, Beijing, Aug 2--4, 2016.
- L-functions and Arithmetic, a conference in honor of the 60th Birthday of Karl Rubin, Harvard University, Jun 13--16, 2016.
- Conference on the Cohomology of Arithmetic Groups on the occasion of Joachim Schwermer's 66th birthday, MPI, Bonn, Jun 6--10, 2016.
- 2016 AS-NCTS Workshop on Shimura Varieties and Related Topics, Taipei, May 30--Jun 3, 2016; co-organized with Xuhua He and Chia-Fu Yu.
- 2016 NCTS Summer School on Shimura Varieties and Related Topics, Taipei, May 23--27, 2016; co-organized with Xuhua He and Chia-Fu Yu.
- Reductions of Shimura Varieties, Oberwolfach, Aug 23--29, 2015.
- Frontiers in Serre's Modularity Conjecture: Torsion and Low Weights, Luxembourg, Jun 15--19, 2015.
- Journées arithmétiques à Lyon, June 10--12, 2015.
*p*-adic Methods in Number Theory---A Conference Inspired by the Mathematics of Robert Coleman, Berkeley, May 26--30, 2015.- Arithmetic Geometry and Automorphic Representations, ESI, Vienna, Apr 7--May 29, 2015. (I participated only during May 10--21, 2015.)
*p*-adic Methods in the Theory of Classical Automorphic Forms, CRM, Montréal, Mar 9--14, 2015.- Automorphic Forms, Shimura Varieties, Galois Representations and L-Functions (a workshop in honor of Michael Harris), MSRI, Dec 1--5, 2014.
- Categorical Structures in Harmonic Analysis, MSRI, Nov 17--21, 2014.
- Introductory Workshop: New Geometric Methods in Number Theory and Automorphic Forms, MSRI, Aug 18--22, 2014.
- New Geometric Methods in Number Theory and Automorphic Forms, MSRI, Aug 11--Dec 12, 2014. (I participated only during Nov 2--21 and Nov 30--Dec 12, 2014.)
- Pan Asia Number theory (ICM satellite conference), POSTECH, Pohang, South Korea, Aug 5--9, 2014.
*p*-adic Variation in Number Theory (in honor of Glenn Stevens' 60th Birthday), Boston University, Jun 2--6, 2014.- Hot Topics: Perfectoid Spaces and their Applications, MSRI, Feb 17--21, 2014.
- Arithmetic Algebraic Geometry, Paderborn, Oct 7--11, 2013.
- International Congress of Chinese Mathematicians, Taipei, July 14--19, 2013.
*p*-adic Modular Forms, L-functions, and Galois representations, UCLA, May 10--12, 2013.- Higher Rank Automorphic Forms and L-functions, University of Warwick, Apr 29--May 3, 2013.
- Arithmetic and Geometry, Hausdorff Trimester Program, Bonn, Jan 2--Apr 19, 2013. (I participated only during Jan 29--Feb 9, 2013.)
- Workshop on the Arithmetic Geometry of Shimura Varieties, Representation Theory, and Related Topics, Sapporo, Jul 18--22, 2012.
*p*-adic Modular Forms and Arithmetic (a Conference in Honor of Haruzo Hida on His 60th Birthday), UCLA, Jun 18--23, 2012.- Workshop on Cohomology of Shimura Varieties: Arithmetic Aspects and the Construction of Galois Representations, Fields Institute, Mar 19--23, 2012. (This is part of the Thematic Program on Galois Representations.)
- Workshop on Arithmetic Geometry and Representation Theory, HKUST IAS, Hong Kong, Dec 15, 2011--Jan 15, 2012. (I participated only during Dec 18, 2011--Jan 8, 2012.)
- Periods of Automorphic Forms and Applications to L-Functions, Columbia University, Sep 15--18, 2011.
- Theta Festival, POSTECH, Pohang, South Korea, Aug 13--19, 2011.
- Workshop on the Arithmetic Geometry of Shimura Varieties and Rapoport-Zink Spaces, Kyoto University, Jul 4--8, 2011.
- 2011 NCTS International Conference on Galois Representations, Automorphic Forms and Shimura Varieties, Hsinchu, Taiwan, Jun 20--23, 2011.
- Workshop on Galois Representations and Automorphic Forms, IAS, Mar 21--25, 2011.
- Workshop on Automorphic Forms and Shimura Varieties, Columbia University, Mar 18--20, 2011.
- International Congress of Chinese Mathematicians, Tsinghua University, Beijing, Dec 17--22, 2010.
- Galois Representations and Automorphic Forms, IAS, Sep 20, 2010--Apr 8, 2011.
- Workshop on Arithmetic Geometry and Related Topics, Taipei, Jul 12--16, 2010; co-organized with Ming-Lun Hsieh and Jeng-Daw Yu.
- Modular/Geometric Iwasawa Theory and p-adic L-functions, UCLA, Jun 14--20, 2010.
- Number Theory and Representation Theory, a conference in honor of the 60th birthday of Benedict Gross, Harvard University, Jun 2--5, 2010.
- Workshop on Arithmetic Geometry in Kanazawa, Nov 24--27, 2009.
- Workshop on Automorphic Representations, Geometry, and Arithmetic, Taipei, Jul 21--24, 2009; co-organized with Chia-Fu Yu and Jeng-Daw Yu.
- Clay Mathematics Institute Summer School on Galois Representations, University of Hawaii at Manoa, Honolulu, Hawaii, Jun 15--Jul 10, 2009.
- Workshop on Shimura Varieties, Automorphic Representations and Related Topics, Kyoto, Nov 25--28, 2008.
- Représentation p-adiques des groupes p-adiques, Jussieu, Paris, Jul 7--12, 2008.
- Modular Forms and Arithmetic, MSRI, Jun 28--Jul 2, 2008.
- Current Developments and Directions in the Langlands Program, Northwestern University, May 10-14, 2008.
- Recent Developments in Number Theory: Selmer Groups, L-functions, and Galois Deformations, UCLA, Mar 24--29, 2008.
- Algebraic and Arithmetic Structures of Moduli Spaces, Sapporo, Sep 3--7, 2007.
- Summer School on Serre's Modularity Conjecture, Luminy, Jul 9--20, 2007
- Mini-Workshop on Automorphic Representations and Shimura Varieties, Kyoto, May 30--31, 2007. (Informal seminars, May 28--29, 2007.)
- Arizona Winter School on
*p-adic geometry*, Tucson, Mar 10--14, 2007. - Workshop on the Representation Theory of Reductive Algebraic Groups, Ottawa, Jan 18--21, 2007.
- Hot Topics: Modularity for GL(2) and Beyond, MSRI, Oct 30--Nov 3, 2006.
- Clay Mathematics Institute Summer School on Arithmetic Geometry, Göttingen, Jul 17--Aug 11, 2006. (I attended only the lectures in the last week, Aug 6--11, 2006.)
- Asian-French Summer School in Algebraic Geometry and Number Theory: Motives and related topics, IHES, Jul 17--29, 2006.
- Instructional Workshop: Automorphic Galois Representations, L-functions and Arithmetic, Columbia University, Jun 17--22, 2006.
- Special Program on Eigenvarieties, Harvard University, Spring 2006.
- Intersection of Arithmetic Cycles and Automorphic Forms, Montréal, Dec 12--16, 2005. Link 1Link 2

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