Fudan-KAIST Joint Workshop on Algebra and Geometry, KAIST, Oct.10-12, 2019.
Invited speaker at Special session on Arithmetic Geometry and related topics, Vietnam-AMS Joint Meeting, Quy Nhon,Vietnam, June 10-13, 2019.
Number Theory seminar, Seoul National University, May 3, 2019.
Tokyo Institute of Technology, Mar. 29, 2019.
2018
Number theory day, Dec. 27-28, 2018.
RIMS, Kyoto University, Japan, Nov. 26-30, 2018.
UNIST, Colloquium, Nov. 07, 2018.
Special session on Advances of automorphic forms and related topics, KMS-DMV Joint Conference, COEX, Korea, Oct.03-06, 2018.
2018 Canadian Number Theory Association conference, July 9-13, 2018.
2018 Automorphic forms workshop, Tufts Univ., Medford, USA, March 19-22, 2018.
2017
NCTS-PMI Joint workshop on Number Theory, NCTS, Taiwan, Dec. 27-29, 2017.
Sogang University, Colloquium, Nov. 23, 2017.
UNIST, Colloquium, Oct. 12, 2017.
2017 KWMS 13th International Conference, POSTECH, June 22-23, 2017.
Fudan-KAIST Joint workshop on Algebra and number theory, Fudan Univ., June 06-10, 2017.
Joint Korea-Singapore Workshop on Discrete Mathematics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore, 17-19 Feb 2017.
Rank gain of Jacobian varieties over Galois extensions, Algebra/Lie Theory and Generalizations, Number Theory, AMC 2016, Bali,July 25-29, 2016.
The growth of the rank of abelian varieties over certain Galois extensions, 2016 Seoul-Tokyo Conference on Number Theory, KIAS, June 16-17, 2016.
Rational curves on the quotient varieties and its application to the rank of abelian varieties, Departmental Seminar, KAIST, April 20, 2016.
Zeros of weakly holomorphic and quasi-modular forms for certain groups, Number Theory Seminar, KIAS, March 24, 2016.
Zeros of weakly holomorphic modular forms and quasi modular forms for certain groups, Japan-Korea Number Theory Workshop, POSTECH, Feb. 1-4, 2016.
2015
Elliptic curves and the congruent number problem, 2015 workshop on geometry and related topics, Jeju National University, November 27-28, 2015.
Rational curves in the quotients of abelian varieties by finite groups, Colloquium, Ajou Univ. November 6, 2015.
Rational curves in the quotients of abelian varieties by finite groups, Colloquium, POSTECH, October 16, 2015.
Sporadic Symposium on Arithmetic and Geometry 1, KIAS, September 3-5, 2015.
The zeros of the weakly holomorphic modular forms and quasi-modular forms, AMS meeting, San Antonio, USA, Jan. 13-17, 2015.
2014
Rational curves in the quotients of abelian varieties by finite groups, NCTS, Taiwan, Dec.19-23, 2014.
The zeros of the weakly holomorphic modular forms and quasi-modular forms, The China-Korea Number Theory Conference, Sanya, China, Oct. 2-6, 2014.
The zeros of the weakly holomorphic modular forms and quasi-modular forms, The Automorphic forms and Arithmetic, 2014 Seoul ICM satellite conference, POSTECH, Korea, Aug. 24-29, 2014.
The twists of elliptic curves, the AMS meeting, Baltimore, USA, Jan. 11-15, 2014.
2013
AMC 2013, BEXCO, June 30-July 4, 2013
2009
Weak approximation of quadrics and Non-empty hypersurfaces over quasi-finite fields, Industrious Number Theory Workshop, KIAS, March 22-23, 2009.
Quadratic Twists of elliptic curves, PANT Workshop, Jan. 8-11, 2009
2008
Non-empty hypersurfaces over quasi-finite fields, Number Theory Seminar, KIAS, Dec. 11, 2008.
Mordell-Weil group of abelian varieties and the action of the absolute galois group on abelian varieties, NIMS, June 19, 2008.
The action of the absolute galois group on abelian varieties, KAIST, June 12, 2008.
Roots of unity of the Galois representation on elliptic curves, Kyung Hee University, May 28, 2008.
Infinite multiplicity of nth roots of unity of the Galois representation on abelian varieties, Postech, May 23, 2008.
On the Products of quadratic twists of elliptic curves, Algebra Seminar, Indiana University, Bloomington, Feb.25, 2008
2007
Mordell-Weil groups of elliptic curves, Departmental colloquium, Department of Mathematics, SookMyung Women's University, Nov.1, 2007.
Weak approximations for linear systems of quadrics, Algebra Session, KWMS, July 5, 2007
Mordell-Weil groups of elliptic curves, Departmental colloquium, Department of Mathematics, Konkuk University, May 16, 2007.
Mordell-Weil groups of elliptic curves, Departmental colloquium, Department of Mathematics, Yonsei University, May 3, 2007.
Abelian varieties over cyclic fields, KAIST Number Theory Conference, KAIST, February 1, 2007.
Heegner points and the rank of elliptic curves over large extensions of global fields, Special Session on Arithmetic of function fields, The AMS national meeting (#113 national, #1023 meeting), New Orleans, Louisiana, Jan.5-8, 2007.
2006
Abelian varieties over cyclic fields, International Number Theory Workshop, KIAS, Seoul, Korea, Dec. 7-9, 2006.
Abelian varieties over cyclic fields, KIAS, Number Theory Seminar, KIAS, Seoul, Korea, Nov. 10, 2006.
The rank of elliptic curves over large fields, KMS, Special Session on Number Theory, Seoul National University, Seoul, Korea, Oct. 27-29, 2006.
Open conditions for infinite multiplicity eigenvalues on elliptic curves and its generalization to abelian varieties, Special Session on Number Theory, The AMS Sectional Meeting (#1019), University of Utah, Oct.7-8, 2006.
The rank of elliptic curves over large fields, Departmental Colloquium, Ewha Womans University, Oct. 13, 2006.
The rank of elliptic curves over large fields, Departmental Colloquium, Chung-Ang University, Sept. 29, 2006.
Open conditions for infinite multiplicity eigenvalues on elliptic curves, Special Session on Galois Theory in Arithmetic and Geometry, The AMS 2006 Spring Eastern Sectional Meeting (#1017), University of New Hampshire, Durham, NH, April 22-23, 2006.
The rank of elliptic curves over large fields, Colloquium, Department of Mathematics, University of Idaho, March 6, 2006.
The rank of elliptic curves over large fields, Colloquium, Department of Mathematics & Statistics, Georgia State University, February 27, 2006.
Progress on the rank of abelian varieties over large fields, Number Theory Seminar at U. of Utah, May 4, 2006.
2005
Elliptic curves as the natural representation of the absolute Galois group and the rank over large fields, Algebra and Number Theory Seminar, Penn State University, November 17, 2005.
The rank of elliptic curves and infinite multiplicity of roots of unity on elliptic curves, Departmental Colloquium, Korea University, Seoul, Korea, September 30, 2005.
The rank of elliptic curves and infinite multiplicity of roots of unity on elliptic curves, Number Theory Seminar, KIAS (Korea Institute for Advanced Study), Korea, July 14, 2005.
The rank of elliptic curves and infinite multiplicity of roots of unity on elliptic curves, KWMS, The 2nd International Workshop for Korean Woman in Mathematics, Korea, June 20-21, 2005.
Infinite multiplicity of roots of unity of the Galois representation on elliptic curves, Special Session on Arithmetical Algebraic Geometry, AMS national meeting (#1003), Atlanta, Georgia, January 5-8, 2005
2004
The rank of elliptic curves over large fields, Departmental Colloquium at Ewha Womans University, Seoul, Korea, May 25, 2004.
The rank of elliptic curves over large fields, Number Theory Seminar at (POSTECH) Pohang University of Science and Technology, Pohang, Korea, May 20, 2004.
The rank of elliptic curves over large fields, Number Theory Seminar at University of Utah, Salt Lake City, February 6, 2004.
The rank of the Mordell-Weil groups of elliptic curves over large fields, Special Session on Arithmetical Algebraic Geometry, The AMS meeting (#993), Phoenix, Arizona, January 7-10, 2004
Hilbert irreducibility and its application, Commutative Algebra Seminar at U. of Utah, November 12, 2004.
Infinite multiplicity of the Galois group on elliptic curves, Number Theory Seminar at U. of Utah, October 6, 2004.
2003
The rank of elliptic curves over large fields, Québec-Vermont Number Theory Seminars at McGill University, Canada, March 27, 2003
The rank of elliptic curves over large fields, Algebraic Number Theory Seminar at University of Illinois-Urbana Champaign, February 20, 2003
The rank of the Mordell-Weil groups of elliptic curves over large fields, Midwest Number Theory Conference, Univ. of Wisconsin - Madison, October 25-26, 2003
Mordell-Weil groups of elliptic curves over large fields, Session on Number Theory I, AMS meeting (#983), Baltimore, MA, January 15, 2003, Heegner points and Mordell-Weil groups of elliptic curves over large fields, Algebra Seminar at Indiana University, November 10, 2003