April 2025, Rigidity results on symplectic fillings and applications, 2025 KMS Spring Meeting, Korea
January 2025, Rigidity aspects of symplectic fillings, 2025 Symplectic Retreat, Tongyeong, Korea
January 2025, Symplectic and contact topology of singularities, Intensive Lectures at Chungnam National University, Korea
October 2024, Symplectic fillings of unit cotangent bundles of spheres, PNU Geometry and Topology Seminar, Korea
July 2024, Entropy of symplectic Torelli class via Floer homology I, Symplectic Geometry in Gongju, Korea
April 2024, Real Lagrangians in Milnor fibers and growth of Floer homology, 2024 KMS Spring Meeting, Korea
November 2023, Symplectic fillings of unit cotangent bundles, East Asian Symplectic Conference 2023, Korea
May 2023, Singularities, contact structures, and symplectic fillings, Colloquium, Sogang University, Korea
April 2023, Rational ruled surfaces as symplectic hyperplane sections, 2023 KMS Spring Meeting, Korea
January 2023, Uniqueness results on symplectic fillings of contact manifolds, Topology Seminar, Osaka University, Japan
December 2022, Uniqueness of symplectic fillings of contact manifolds, Geometry Seminar, Yonsei University, Korea
September 2022, Contact topology of singularities and symplectic fillings, Colloquium, Seoul National University, Korea
September 2022, Index-positive contact manifolds and Legendrians, Symplectic Geometry Seminar, Seoul National University, Korea
August 2022, Singularities, contact structures, and symplectic fillings, The 4th Workshop for Young Symplectic Geometers, Incheon National University, Korea
July 2022, Contact topology of singularities and symplectic fillings, ASADCS Seminar, Chungnam National University, Korea
June 2022, Lagrangian filling of the standard Legendrian sphere, 2022 Honam Math. Soc. Annual Meeting, Damyang, Korea
April 2022, Index-positivity of Legendrians and Lagrangian fillings, 2022 KMS Spring Meeting, Korea
January 2022, Singularities in contact topology, QSMS Workshop, Yeosu, Korea
July 2021, An explicit computation of wrapped Floer homology ring via Seidel maps, Symplectic Geometry Seminar, Seoul National University, Korea
April 2021, Seidel operators in wrapped Floer homology, 2021 KMS spring meeting, Focus Session on Floer theory, Korea
June 2020, Rational ruled surfaces as symplectic divisors, Korea Institute for Advanced Study, Korea
January 2020, Symplectic topology via Floer theory and singularities, Workshop on Singularities and Symplectic Geometry, 8 – 10 January 2020, RIMS, Japan
December 2019, Contact topology of singularities, Topology seminar, Korea Institute for Advanced Study, Korea
November 2019, Contact structures on links of singularities, SKKU, Korea
October 2019, Symplectic fillings of unit cotangent bundles, Topology seminar, Korea Institute for Advanced Study, Korea
May 2019, A computation of the ring structure in wrapped Floer homology, Berlin-Hamburg Seminar zur symplektischen Geometrie, Germany
February 2019, A computation of ring structure in wrapped Floer homology, Symplectic Seminar, RIMS, Japan
February 2019, Real Lagrangians in Brieskorn Milnor fibers, Geometry Seminar, Chiba University, Japan
January 2019, Real Lagrangians in Brieskorn Milnor fibers, Topology Project Workshop: Contact structures, Singularities, Differential Equations and Related topics, Shizuoka, Japan
January 2019, Symplectic fillings of unit cotangent bundles of spheres, Mini Workshop on Symplectic and Contact Mapping Class Groups, Seoul National University, Korea
November 2018, Real Lagrangians in Brieskorn Milnor fibers I and II, Séminaire de Géométrie et Systèmes dynamiques, Université de Neuchâtel, Switzerland
October 2018, Real Lagrangians in Brieskorn Milnor fibers, Joint meeing of the KMS and the DMV, 03 – 05 October 2018, Seoul, Korea
April 2018, Symplectic fillings of unit cotangent bundles, Oberseminar Analysis, Justus-Liebig-Universität Gießen, Germany
September 2017, Morse-Bott spectral sequence, SFB Annual Retreat, Maria in der Aue, Germany
May 2017, Volume growth in the component of the fibered twist, Oberseminar Differentialgeometrie, Universität Augsburg, Germany
May 2017, Morse-Bott spectral sequence in symplectic homology I, II, and III, Hauptseminar Symplektische Geometrie, Universität Heidelberg, Germany
February 2017, Contact Structures on Links of Singularities, Shinchon Workshop on Algebraic Geometry, Yonsei University, Korea
February 2017, Morse-Bott Spectral Sequences and the Links of Weighted Homogeneous Polynomials, 12th KIAS Geometry Winter School, Jeongseon, Korea
December 2016, Contact Structures on the Links of Singularities, 2016 SNU Topology Winter School, Wonju, Korea
November 2016, Morse-Bott Spectral Sequences and the Links of Singularities, 2016 Pohang Mathematics Workshop, Busan, Korea
October 2016, Equivariant Symplectic Homology of Brieskorn Manifolds, International Conference for the 70th Anniversary of Korean Mathematical Society, Seoul National University, Korea
April 2016, On the Mean Euler Characteristic of Brieskorn Manifolds, 2016 Korean Mathematical Society Spring Meeting, SKKU, Korea
March 2016, A Survey on Brieskorn Manifolds, SNU/NAGOYA Students Research Workshop II, SNU, Korea
July 2015, Contact Topology of Brieskorn Manifolds, Symplectic Geometry Seminar, WWU Münster, Germany
July 2018, Lecture series (5 lectures) on Brieskorn manifolds and positive equivariant symplectic homology, Summer school on equivariant symplectic homology, 23 – 27 July 2018, Schloß Rauischholzhausen, Germany
June 2018, Precourse (3 lectures) on symplectic manifolds and Hamilton dynamics, CIMPA-NIMS Research School on symplectic embeddings, systolic inequalities and celestial mechanics, 11 – 20 June 2018, Daejoen, Korea
2023년 5월, [고교특강] 모양과 공간의 수학 - 위상수학 소개, 순천고등학교
2022년 5월, [고교특강] 기하학 이야기 - 유클리드 기하학과 비유클리드 기하학, 순천고등학교