Yeansu Kim 
C.V.: DOWNLOAD (Mar. 2018)
Email: ykim(at)jnu(dot)ac(dot)kr
Office: 417 Sabum 4-ho, 77 Yongbong-ro Chonnam National University, Gwangju city, South Korea  

Employment:
 
   o Sept. 2016 - present: Assistant Professor, Mathematics Education, Chonnam National University, Gwangju city, South Korea.
   o Aug. 2013 - May 2014, May 2015 - Aug 2016: Visiting Assistant Professor, Mathematics, University of Iowa, Iowa city, IA, U.S.A.
   o Jun. 2015 - Jul. 2015: Postdoctoral Fellow, Max Planck Institute for Mathematics, Bonn, Germany.
   o Aug. 2014 - May 2015: Postdoctoral Associate, Mathematics, Iowa State University, Ames, IA, U.S.A.


Education:

   o Aug. 2013: Ph. D., Mathematics, Purdue University, West Lafayette, IN, U.S.A. 
                        (Advisor: Professor Freydoon Shahidi) 
                        (Military Service: Jun. 2006 - Jun. 2008).
   o Feb. 2005: Bachelor of Science, Mathematics, Magna cum Laude, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, South Korea (Minor: Applied Mathematics)


Papers   
 - Publication:
   6. Y. Kim and I. Matic, Discrete series of odd general spin groups, submitted, arXiv: 1706.01111.

        (AbstractWe obtain a Moeglin-Tadic type classification of the non-cuspidal discrete series of odd general spin groups over a non-archimedean local field of characteristic zero. Our approach presents a simplified and uniform proof of a bijective correspondence between isomorphism classes of the non-cuspidal discrete series and the admissible triples, which mostly relies on purely algebraic methods, available in both classical and the odd general spin case. Furthermore, the presented approach can potentially be directly applied to some other reductive groups over non-archimedean local fields.)

   5. Y. Kim, Two main conjectures in Langlands program, Prime Numbers and Representation Theory, Lecture Series of Modern Number Theory,
 
vol 2, Science press, Beijing, 174-196 (2017)

        (This is survey article based on lectures at MCM workshop on Number Theory held on July 20-28, 2014, at Morningside center of Mathematics, Beijing, China)


   4. Y. Kim, Langlands-Shahidi L-functions for GSpin groups and the generic Arthur packet conjecture, submitted, arXiv: 1507.07156.

        (AbstractThe first main result is `the equality of L-functions from Langlands-Shahidi method for GSpin groups and the corresponding Artin L-functions through the local Langlands correspondence.' One main tool of the first main result is the classification of strongly positive generic representations of GSpin groups. (Note that the strongly positive representations are constructed in my previous two papers and those are under the assumption on the uniqueness of the reducibility point. However, in the generic case, Shahidi proved that the reducibility point is unique and it is either 0, 1/2, 1. Therefore, the result on classification of the strongly positive generic representations is unconditional.) The second result is `the construction of generic L-packets (under the assumption on the existence of L-functions that are attached to non-generic representations).' (Note that Lemma (the representation is tempered if and only if its local functorial lift is tempered) is not based on the above assumption and is unconditional and this lemma is one crucial step when we strengthen the generic Arthur packet conjecture). The third result is the applications of the first and second results, which are `two versions (weak and strong) of the generic Arthur packet conjecture for GSpin groups (local version of the Generalized Ramanujan conjecture).' Note that the idea used in chapter 5 (definition of L-packets and its properties and applications (generic Arthur packet conjecture)) can be extended to the case of classical groups and we leave this for future research.)

   3. Y. Kim, Strongly positive representations of even GSpin groups and the Jacquet module method, Pacific Journal of Mathematics, vol 280, No. 1, 69-88 (2016).

        (AbstractThe main result is 'the classification of strongly positive representations of even GSpin groups and Tadic's structure formula for even GSpin groups.' Note that the even case are parallel to odd case but parts of their proof are quite different due to, for example, outer automorphism on the Dynkin diagram of even GSpin groups that permutes the last two simple roots.)

   2. V. Heiermann and Y. Kim, On the generic local Langlands correpondence for GSpin groups, Transactions of the AMS, vol 369, 4275-4291 (2017).
        
        (AbstractThe main result is 'the construction of Langlands parameter that corresponds to irreducible admissible generic representations of GSpin groups with the equality of L-functions.' This result is based on the method established by the first author. Namely, assuming the existence of Langlands parameters that correspond to supercuspidal representations, the first author constructed the Langlands parameters in general in his previous papers. In this paper, we construct Langlands parameter that corresponds to supercuspidal representations (This result is based on second author's Ph.D. thesis) and apply the method of Heiermann.)
        
   1. Y. Kim, Strongly positive representations of odd GSpin groups and the Jacquet module method, With an appendix, `Strongly positive representations in an exceptional rank-one reducibility case' by Ivan Matic, Mathematische Zeitschrift, vol 279, 271-296 (2015).
         
        (AbstractThe first main result is 'the construction of structure of Jacquet modules of parabolically induced representations of odd GSpin groups (Tadic's structure formula for odd GSpin groups).' The second result is `the classification of strongly positive representations of odd GSpin groups.' Note that the classification of strongly positive representations (even if it is not full classification of discrete series representations) has several good applications on Langlands program. For example, the results on the equality of L-functions and the proof of strong version of the generic Arthur packet conjecture in my paper [Y. Kim, Langlands-Shahidi L-functions for GSpin groups and the generic Arthur packet conjecture] are based on the classification results.)

 - In Preparation:


Grants   
   Mar. 2017 - Feb. 2022: NRF (National Research Foundation of Korea: 신진연구) grant
   Mar. 2017 - Feb. 2019: JNU (Chonnam National University) grant for new faculty
   Jul. 2016 - Jun. 2018: AMS-Simons Travel Grant
   Jun. 2013: Travel Grant (NSF) for the second Pacific Rim Mathematical Association Congress at Shanghai Jiao Tong University, Shanghai, China
   Aug. 2012 - May 2013: Graduate Staff supported by Prof. Shahidi's NSF grant (105887: Langlands correspondence, L-functions and and Automorphic forms) at Purdue University, West Lafayette, USA
   Summer 2010, 2011, 2012: Graduate school summer research grants at Purdue University, West Lafayette, USA

(Upcoming) visits and conferences:

   o 08/06/2018-08/10/2018: Intensive lectures series on local Langlands correspondenceKAIST, Daejeon, Korea
   o 8/13/2018-9/1/2018: University of Iowa, Iowa city, Iowa, USA
   o 10/03/2018-10/06/2018: 2018 Joint meeting of KMS and DMV, COEX, Seoul, Korea
   o 12/17/2018-12/21/2018: The legacy of Joseph Fourier after 250 years, TSIMF, Sanya, China
   (*) o 12/17/2018 - 01/18/2019: On the Langlands Program: Endoscopy and Beyond, NUS, Singapore 
(*) tentative, plan to attend part of the conference.

Talks  
- Conferences/Workshops Talks:
   Feb. 2018: The 7th East Asia Number Theory Conference, National Taiwan University, Taipei, Taiwan
   Jul. 2017: Representation theory of p-adic groups, Indian Institute of Science Education and Research, Pune, India
  Jun. 2017: 2017 Honam Mathematical Society Annual Meeting (Algebra session), JNU, Gwangju, Korea
  Jun. 2017: 2017 Yongbong Math Education Conference, JNU, Gwangju, Korea
   Oct. 2016: International Conference for the 70th Anniversary of KMS, SNU, Seoul, South Korea
   Oct. 2016: Paul J. Sally, Jr. Midwest Representation Theory Conference In honor of the 70th Birthday of Philip Kutzko, University of Iowa, Iowa city, IA
   Apr. 2016: 2nd annual conference on Number Theory, St. Ambrose University, Davenport, IA
   Oct. 2015: AMS Sectional meeting, Special Session (Automorphic Forms and Representation Theory), Loyola University Chicago, Chicago, IL
   o Aug. 2014: The International Congress of Mathematics 2014 (Short communications in Number Theory), Seoul, Korea
   Jul. 2014: 2014 Workshop on Number Theory (four talks), Morningside Center of Mathematics, Academy of Mathematics and System Science, Beijing, China
   Jul. 2014: Meeting of Young Number Theorists 2014, Gyeongju, Korea
   Jun. 2014: Mini-workshop on Automorphic Forms and Geometric Langlands Program (three talks), Fields Institute, Toronto, ON, Canada
   Jan. 2014: AMS Joint Mathematical Meeting, Special Session (Recent Progress in the Langlands program), Baltimore, MD
   Oct. 2013: AMS Sectional meeting, Special Session (Automorphic Forms and Representation Theory), St. Louis, MO
   Jun. 2013: AMC (Asian Mathematical Conference) 2013, Special Session (Number Theory) - Contributed Talk, Busan, Korea
   Jun. 2013: PRIMA (Pacific Rim Mathematical Association), Algebra and Number Theory session, Shanghai, China 
   o Mar. 2013: Whittaker Functions, Schubert  calculus and Crystals - Poster Session, ICERM, Providence, RI  
   o Oct. 2012: Midwest Number Theory Conference for Graduate Students and Recent PhDs IX, UIUC, Champaign, IL
   o Sep. 2012: TORA (Texas-Oklahoma Representations and Automorphic forms) III, University of Oklahoma, Norman, OK
   o Apr. 2012: TORA (Texas-Oklahoma Representations and Automorphic forms) II, Oklahoma State University, Stillwater, OK
 - Invited Talks:
   o Sept. 2017: Seminar, Center for Mathematical Challenges, KIAS, Seoul, Korea
   o Aug. 2017: Department of Mathematics, Chungnam National University, Daejeon, Korea
   Jun. 2017: Colloquium, Sungkyunkwan University, Suwon, Korea
   o Feb. 2017, Mar. 2017: Mudeung Seminar, Chonnam National University, Gwangju, Korea Feb., Mar. 2017 
   o Dec. 2016: Algebraic Geometry seminar, KAIST, Daejeon, Korea
   o Nov. 2016: Number Theory Seminar, KIAS, Seoul, Korea
   Apr. 2016, Sept. 2015, Apr. 2014, Sept 2013: Representation Theory Seminar (two talks), University of Iowa, Iowa city, IA
   Apr. 2016, Sept. 2015, Apr. 2014, Sept 2013: Representation Theory Seminar (two talks), University of Iowa, Iowa city, IA
   Jan. 2016: Georgia Southern University, Statesboro, GA
   Jul. 2015: Number Theory Lunch SeminarMax Planck Institute for Mathematics, Bonn, Germany
   o Jul. 2015: Unitary Representations and Automorphic Forms Seminar, University of Zagreb, Zagreb, Croatia
   Nov. 2014: Combinatorics/Algebra Seminar, Iowa State University, Ames, IA
   o Aug. 2014: School of Mathematics Seminars and Lectures, Tata Institute of Fundamental Research, Mumbai, India
   Jul. 2013: Number Theory Seminar (two talks), Seoul National University, Seoul, Korea
   Jul. 2013: Number Theory Seminar (two talks), Postech, Pohang, Korea
   Jun. 2013: Number Theory Seminar, KAIST, Daejeon, Korea 
   o Jun. 2013: Number Theory Seminar, KIAS, Seoul, Korea 
   Jun. 2013: Special Colloquium, Ajou University, Suwon, Korea 
   o Jun. 2013: Number Theory Seminar, University of Chicago, Chicago, IL
   o Feb. 2013: Automorphic forms Seminar, Purdue University, West Lafayette, IN

Conferences Organized:

   o 04/12/2015: Number Theory and Representation Theory Day at Iowa, Iowa State University, Ames, IA