Invited talk, 2017 Fall conference of Korea Mathematical Society, Dankook Univ, 2017.10.27
Main speaker, KIAS Open School (Topic: Probabilistic methods in Combinatorics), 2017.08.21~2017.08.25
Minisymposia, SIAM Conference on Discrete Mathematics, Georgia State Univ, Atlanta, USA, 2016.06.06
2014 Combinatorics Workshop (Invited lecture), Ajou Univ, Korea, 2014.11.01
The 15th RS&A (Random Structures and Algorithms) Conference, 2011.05
SODA11 (ACM-SIAM Symposiums on Discrete Algorithm), 2011.01
Incheon National Univ, 2019.11.29 (Host: Yoonbok Lee)
Kyung Hee Univ (Seoul campus), 2019.11.27
Kyung Hee Univ (Global campus). 2019.11.08
UNIST, Korea, 2019.10.18 (Host: Hantaek Bae)
Postech, Korea, 2018.05.18 (Host: Younghwan Son)
Kyung Hee Univ., Korea, 2018.05.02 (Host: Jong Do Park)
Ajou Univ, Korea, 2017.10.13 (Host: Boram Park)
Sungkyunkwan Univ, Korea, 2016.03.31 (Host: Jang Soo Kim)
Kyungpook National Univ, Korea, 2014.04.23 (Host: Mark Siggers)
NIMS (Nat'l Institute for Mathematical Sciences), Korea, 2013.10.31 (Host: Boram Park)
Yonsei Univ, Korea, 2013.05.30 (Host: Soogil Seo)
Dynamic coloring of a planar graph, Seoul Science High School (서울과학고등학교), 2024.05.23
High school mathematics lecture, KyungHee Girls' High School (경희여자고등학교), 2023.12.20
High school mathematics lecture, Shindorim High School (신도림고등학교), 2023.06.19
What is a mathematician? (수학자 진로체험), Gwangnam Elementary School (광남초등학교), 2023.04.13
Workshop on Graph coloring and related topics, Konkuk University, 2023.01.28
Computational Method and Beyond, Seoul Tech., 2023.01.19
ICMTA conference, 2022.12.01
KIAS combinatorial workshop, 2022.06.15
2021 Combinatorics workshop, 2021.12.19
KMS Fall workshop, 2021.09.01
Mathematics public lectures, Hwnail high school, 2021.07.06
2020 Mini Workshop on Trends in Number Theory, Seoul Tech, 2020.02.07 (Host: Byungchan Kim)
Colloquium, Incheon National Univ, 2019.11.29 (Host: Yoonbok Lee)
Colloquium, Kyung Hee Univ (Seoul campus), 2019.11.27
Colloquium, Kyung Hee Univ (Global campus). 2019.11.08
Colloquium, UNIST, Korea, 2019.10.18 (Host: Hantaek Bae)
KPPY combinatorics workshop, Kyungpook Nat'l Univ., 2017.09.07 (Host: Mark Siggers)
Human Brain Function Lab, Seoul National University Hospital, Korea, 2019.07.23 (Host: Chun Kee Chung)
KMO weekend lecture for national team, 2019.05.08 (Host: Heesung Shin)
Combinatorics Seminar, IBS, Daejeon, 2019.05.08 (Host: Sang-il Oum)
2019 KMS spring conference, Kanwon National Univ., Korea, 2019.04.29
Combinatorics seminar, Ryukyu Univ., Japan, 2019.02.18 (Host: Norihide Tokushige)
30th coast combinatorics conference, Univ. of Hawaii, Manoa, 2019.02.14
22nd KIAS Combinatorics workshop, Pusan, Korea, 2018.12.20
SCMS Workshop on Extremal and Structural Graph Theory, Shanghai, China, 2018.11.30
Colloquium, Sorabol High School, Seoul, 2018.09.12
Colloquium, Postech, Korea, 2018.05.18 (Host: Younghwan Son)
Colloquium, Kyung Hee Univ., Korea, 2018.05.02 (Host: Jong Do Park)
Combinatorics Seminar, Emory University, 2018.01.29 (Host: Vojtech Rodl)
IWCM, Ehwa Womans Univ, 12/16/2017 (Host: Younjin Kim)
Invited talk, 2017 Fall conference of Korea Mathematical Society, Dankook Univ, 10/27/2017
Colloquium, Ajou Univ, Korea, 10/13/2017 (Host: Boram Park)
KPPY combinatorics workshop, Kyungpook Nat'l Univ., 09/16/2017 (Host: Mark Siggers)
Main speaker, KIAS Open School (Topic: Probabilistic methods in Combinatorics), 08/21/2017~08/25/2017
KMO weekend lecture for national team, 06/11/2017 (Host: Sang-il Oum)
The first Joint Korea-Singapore Workshop on Discrete Math., Nanyang Tech. Univ., Singapore from 02/17/2017
Seminar, IME, Univ. of Sao Paulo, 02/03/2017 (Host: Yoshiharu Kohayakawa)
Combinatorics Seminar, Emory Univ., 01/23/2017 (Host: Vojtech Rodl)
Seminar, Applied Algebra and Optimization Research Center, Sungkyunkwan Univ., Korea, 11/25/2016
International Conference for the 70th Anniversary of Korean Math. Soc., 10/22/2016
Colloquium, Sorabol High School, Seoul, 10/19/2016
Mentor, Korea Scholar's Conference for Youth (KSCY), Yonsei Univ., 07/30/2016
Minisymposia, SIAM Conference on Discrete Mathematics, Georgia State Univ, Atlanta, USA, 06/06/2016
Colloquium, Sungkyunkwan Univ, Korea, 03/31/2016 (Host: Jang Soo Kim)
International Workshop on Graphs and Combinatorics, Ehwa Womans Univ, Korea, 02/18/2016 (Host: Younjin Kim)
2015 KMS Fall conference, Yonsei Univ., Korea, 10/24/2015
17th RS&A (Random Structures and Algorithms) Conference, Carnegie Mellon Univ, 07/30/2015
2015 Combinatorics Workshop, NIMS (Nat'l Institute for Mathematical Sciences), Korea, 07/16/2015
KPPY Combinatorics Workshop, Yeungnam Univ, Korea, 07/11/2015 (Host: Mark Siggers)
Combinatorics Seminar, Emory Univ., 01/12/2015 (Host: Vojtech Rodl)
2014 Combinatorics Workshop (Invited lecture), Ajou Univ, Korea, 11/01/2014
2014 Fall conference of Korea Mathematical Sociery, Yonsei Univ, 10/25/2014
Korea-China Number Theory Seminar, Shandong Univ, China, 10/02/2014 (Cancelled by injury) (Host: Sunghan Bae)
Seoul ICM 2014, Korea, 08/19/2014
Satellite Conference of ICM 2014 on Extremal and Structural Graph Theory, Korea, 08/08/2014
SIAM Conference on Discrete Mathematics 2014, Minneapolis, USA, 06/16/2014
Colloquium, Kyungpook National Univ, Korea, 04/23/2014 (Host: Mark Siggers)
ASARC Number Theory Workshop, Pusan, Korea, 12/16/2013 (Host: Sunghan Bae)
Colloquium, Soongsil Univ, Korea, 11/19/2013 (Host: Chong Gyu Lee)
Colloquium, NIMS (Nat'l Institute for Mathematical Sciences), Korea, 10/31/2013 (Host: Dongsu Kim, Boram Park)
KIAS Computational Sciences Conference, Korea, 10/16/2013 (Host: Jeong Han Kim)
Number Theory Seminar, Postech, Korea, 10/08/2013 (Host: YoungJu Choie)
Graph Theory Conference in honor of 60th birthday of Yoshimi Egawa, Tokyo Univ of Science, Japan, 09/10/2013
The 2nd Meeting of Young Number Theorists, Korea, 08/27/2013 (Host: Byungchan Kim)
AMC (Asian Mathematical Conference), Busan, Korea, 06/30/2013
KPPY Combinatorics Workshop, Kyungpook Nat'l Univ, Korea, 06/08/2013 (Host: Mark Siggers)
Colloquium, Yonsei Univ, Korea, 05/30/2013 (Host: Soogil Seo)
Seminar and lecture, Yeungnam Univ, Korea, 05/10/2013 (Host: Young Soo Kwon)
ASARC meeting, KAIST, Korea, 03/15/2013
The 2nd Number theory festival, Seoul Nat'l Univ, Korea, 02/23/2013
The Arithmetic of Function Fields and Related Topics, Pusan, Korea, 02/21/2013 (Host: Sunghan Bae)
Korea-Japan Joint Seminar on Number Theory and Related Topics, Ewha Womans Univ, Korea, 01/21/2013
Geometry Journal Meeting, KIAS, Korea, 11/21/2012 (Host: Kiryong Chung)
Mini-lectures on `Probabilistic methods in combinatorics', Seoul Nat'l Univ, Korea, 09/21, 10/12, 10/26, 11/09 in 2012 (Host: Suh-Ryung Kim)
Probability Seminar, Seoul Nat'l Univ, Korea 10/18/2012 (Host: Panki Kim)
2012 KMS Fall meeting, Daejeon, Korea, 10/05/2012
Mathematics Seminar, Univ of Incheon, Korea, 09/25/2012 (Host: Yoomi Rho)
2012 Combinatorics Workshop, Chonnam Nat'l Univ, Korea, 08/10/2012
KPPY Combinatorics Workshop, Kyungpook Nat'l Univ, Korea, 08/07/2012 (Host: Mark Siggers)
Meeting of Young Number Theoriests, KIAS, Korea, 07/25/2012 (Host: Byungchan Kim)
Number Theory Seminar, KIAS, Korea, 06/28/2012 (Host: Byungchan Kim)
Discrete Mathematics Seminar, KAIST, Korea, 06/27/2012 (Host: Sang-il Oum)
Meeting of Korean Emory Graduate Students, Emory Univ, 05/09/2012
Combinatorics Seminar, Emory Univ, 04/27/2012
Combinatorics Seminar, Emory Univ (Ph.D. Defence), 04/03/2012
AMS Central Section Meeting, Univ of Nebraska-Lincoln, 10/2011 (Cancelled by back insury)
The 46th KPP Combinatorics Workshop, Kyungpook Nat'l Univ, Korea, 06/2011 (Host: Mark Siggers)
Discrete mathematics Seminar, KAIST, Korea, 06/2011 (Host: Sang-il Oum)
Invited Seminar, Seoul Nat'l Univ, Korea, 06/2011 (Host: Panki Kim)
The 15th RS&A Conference, 05/2011
Combinatorics Seminar, Emory Univ, 04/2011
Combinatorics Seminar, Georgia Tech, 04/2011 (Host: Xingxing Yu)
SODA11 (ACM-SIAM Symposiums on Discrete Algorithm), 01/2011
Combinatorics Seminar, Univ of Sao Paulo, Brazil, 07/2010 (Host: Yoshiharu Kohayakawa)
The 23rd Cumberland Conference on Combinatorics, Graph Theory, and Computing, Univ of Mississippi, 05/2010
Combinatorics Seminar, Univ of Sao Paulo, Brazil, 07/2009 (Host: Yoshiharu Kohayakawa)