2025 Algebraic Geometry Conference in Jeonju, 2025.6.12, "Generalized sheaf counting."
Mini-workshop on moduli spaces and related topics, 2025.5.26, "Generalized sheaf counting 1,2."
Seminaire Fables geometriques, Geneva, 2025.4.2, "Generalized sheaf counting."
Lie Groups and Moduli Spaces Seminar, Geneva, 2025.4.1, "Birational geometry of generalized Hessenberg varieties and the Shareshian-Wachs conjecture."
HCMC 대중강연, 2025.3.15, "다항식 길들이기."
2024 KIAS-APCTP Frontiers of Theoretical Physics, Jeju, 2024.11.25, "Derived enumerative geometry."
Conference on recent progress in algebraic geometry, Gangneung, 2024.11.5, "Gromov-Witten invariants for branched covers."
G-BRL Number Theory Seminar, Chonnam University, 2024.11.1, "Enumerative geometry of points, curves and surfaces."
Mini-workshop on shifted symplectic structures and enumerative geometry, Postech, 2024.10.28~29, "Symplectic transitions from classical to derived geometry 1,2."
Math colloquium, Korea University, 2024.10.11, "Enumerative geometry of points, curves and surfaces."
HCMC colloquium, KIAS, 2024.10.10, "Enumerative geometry of points, curves and surfaces."
2024 Seoul-Taipei Enumerative Geometry, Busan, 2024.10.1, "Generalized sheaf counting."
2024 BICMR-IBSCGP Conference on Gromov-Witten theory and related topics, Jeju, 2024.8.30, "Gromov-Witten invariants of branched covers."
Suzhou workshop on matroid theory, Soochow University, 2024.7.8, "Birational geometry of generalized Hessenberg varieties and the Shareshian-Wachs conjecture."
Workshop on Moduli stacks and Enumerative geometry (EMGW05), Isaac Netwon Institute for Mathematical Sciences, Cambridge, UK, 2024.6.17, "Wall crossing for quasimaps and representations of symmetric groups."
Geometry and analysis seminar, Oxford University, UK, 2024.6.3, "Shifted Lagrange multipliers method."
Algebraic geometry seminar, Utrecht University, the Netherlands, 2024.5.29, "Shifted Lagrange multipliers method."
Algebraic geometry and number theory seminar, Institute of Science and Technology-Austria, Vienna, 2024.4.25, "Shifted Lagrange multipliers method."
Workshop on Enumerative Geometry, SCMS, Shanghai, 2024.3.11, "GLSM revisited."
Mathematics Colloquium, Postech, 2024.3.8, "Enumerative geometry of curves and surfaces."
Mathematics Colloquium, UNIST, 2024.3.7, "Enumerative geometry of curves and surfaces."
Shing-Tung Yau conference, UNIST, 2024.1.11, "Shifted Lagrange multipliers method."
Enumerative geometry in East Asia, Academia Sinica, Taipei, 2023.12.26, "Cosection localization via shifted symplectic geometry."
International conference on Gromov-Witten theory, SYSU, Guangzhou, China, 2023.12.18, "On the cohomology of M0n bar."
iTHEMS Seminar, RIKEN, Japan, 2023.12.6, "Cosection localization via shifted symplectic geometry."
Conference on Algebraic Geometry in Busan, 2023.11.30, "Recent advances in enumerative geometry of sheaves."
서울대 수학강연회, 2023.10.19, "양자상태의 기하학."
Symplectic singularities and field theory with eight supercharges, UNIST, 2023.10.12-13, "Counting sheaves in algebraic geometry."
Workshop on moduli, K-stability, Fano varieties and related topics, IBS-CCG, 2023.5.18-19, "Counting surfaces in projective varieties."
Colloquium, Academia Sinica-Institute of Mathematics, Taipei, 2023.3.23, "Schubert, Hessenberg and Lusztig."
Algebraic geometry seminar, Academia Sinica-Institute of Mathematics, Taipei, 2023.3.21, "Counting surfaces in projective varieties."
Conference on Algebraic Geometry in Yangpyeong, 2023.2.22, "Schubert, Hessenberg and Lusztig."
Combinatorics on flag varieties, Yangyang, 2023.1.31~2.3, "Geometry of Hessenberg varieties", 3 lectures.
Algebraic geometry seminar, KIAS, 2022.11.18, "Vector bundles and sheaves in algebraic geometry, from Abel-Jacobi to Donaldson-Thomas."
아주대 수학과 콜로퀴엄, 2022.10.27, "채색다항식과 대수기하학."
A tribute to the life and work of Professor Bumsig Kim: Categorical and Enumerative Aspects of Mirror Symmetry, 2022.9.22, "Derived cosection localization."
광주과기원 초청강연, 2022.9.2, "채색다항식과 대수기하학."
Workshop on geometry of moduli spaces, Gangneung, 2022.8.28, "Topological cosection localization."
Geometry and Physics seminar (online), IAS-Mathematics at Zhejiang University, 2022.4.19, "Representations on the cohomology of the moduli spaces of pointed stable cuves of genus 0."
Complex geometry seminar, IBS-CCG, 2022.2.10, "A new construction of the moduli space of pointed stable curves of genus 0."
천안 대수기하-정수론 겨울학교, 2022.1.71-21, "Moduli spaces of pointed stable curves of genus 0."
강릉대수기하학세미나, St.John's Hotel, 2021.12.16, "A new construction of the moduli space of pointed stable curves of genus 0."
Beijing-Novosibirsk seminar on geometry and mathematical physics, online, 2021.12.2, "A new construction of the moduli space of pointed stable curves of genus 0."
전주대 수학교육과 초청강연, 전주대학교, 2021.11.3, "대수 기하의 어제와 오늘."
Yeongnam algebraic geometry workshop, Laonzena Hotel Daegu, 2021.10.15, "Algebraic geometry of quantum states."
Buyeo workshop on algebraic geometry, Lotte Resort Buyeo, 2021.10.2, "Stability of vector bundles via stacks."
Math colloquium, Sungkyunkwan University, online, 2021.9.9, "Enumerative geometry of vector bundles in algebraic geometry."
Workshop on quantum analysis, 2021.8.27, Samcheok Sol Beach, "Conformal field theory and algebraic geometry."
Sokcho workshop on algebraic geometry, Ramada Hotel Sokcho, 2021.7.19~20, "Enumerative geometry of bundles and sheaves 1,2."
대한수학회 봄연구발표회 대중강연, online, 2021.4.29, "다항식 - 익숙한 듯 경이로운 벗."
KIAS expositions, KIAS, "Enumerative geometry before and after string theory", 2021.2.26.
Math-String theory seminar, IPMU, online, 2021.1.13, "Localizing virtual cycles for Donaldson-Thomas invariants of Calabi-Yau 4-folds."
Gongju workshop on algebraic geometry, Hotel Gongju, 2020.11.18, "Localizing virtual cycles for DT4 invariants by cosections."
Recent Advances in Moduli and Invariants, online, 2020.9.24, "Cosection localization for everybody."
인공지능과 대학수학, 대한수학회, online, 2020.6.19, "인공지능 시대의 대학수학."
Math-String theory seminar, IPMU, Tokyo, 2020.2.18, "K-theoretic generalized Donaldson-Thomas invariants."
Conference on Recent Advances in Mirror Symmetry, TSIMF, Sanya, 2019.12.19, "Towards a Calabi-Yau/Landau-Ginzburg correspondence."
Workshop on Moduli and Invariants, BIRS-CMO (Oaxaca, Mexico) 2019.11.19, "K-theoretic generalized Donaldson-Thomas invariants."
Algebraic Geometry International Conference, KIAS, 2019.6.6, "Virtual cobordism classes."
Mathematical Aspects of Quantum Information Theory, Seoul, 2019.5.24, "Entangled edge states of corank 1 with positive partial transposes."
Analysis seminar, KIAS, 2019.3.29, "Entangled edge states of corank 1 with positive partial transposes."
Operator theory seminar, SNU, 2019.3.13, "Entangled edge states of corank 1 with positive partial transposes."
Workshop on algebraic geometry, UCSD, 2019.1.13, "Cosection localization and quantum singularity theory."
Workshop on moduli spaces and derived categories, IBS-CGP, 2018.11.29, "Cosection localization and quantum singularity theory."
Workshop on algebraic geometry, Gunsan, 2018.10.11, "Non-reductive geometric invariant theory and quantum entanglement."
Workshop on moduli and varieties, Shanghai Center for Mathematical Sciences, 2018.9.20, "Cosection localization and quantum singularity theory."
Differential, algebraic and topological methods in complex algebraic geometry, Cetraro, Italy, 2018.9.15, "Cosection localization and quantum singularity theory."
Workshop on higher genus Gromov-Witten invariants, Zhejiang University, Hangzhou, China, 2018.8.23, "Quantum singularity theories via cosection localization."
COW seminar on algebraic geometry, Oxford University, 2018.8.6, "Cosection localization and quantum singularity theory."
Algebraic geometry seminar, Sookmyung women's university, 2018.6.18, "Quantum singularity theories via cosection localization."
CMC seminar, KIAS, 2018.6.14, "Generalized Donaldson-Thomas invariants."
CMC seminar, KIAS, 2018.5.2, "Quantum singularity theories via cosection localization."
Simons workshop on homological mirror symmetry, Harvard University, 2018.1.10, "Knorrer periodicity in curve counting."
Master lectures-Quotients, stability and invariants workshop, Sanya, 2017.12.19, "30 years of partial desingularization."
Colloquium, KIAS, 2017.12.12, "A brief history of cosection localization."
Dasan conference of mathematical challenges, 2017.12.1, "Some hard problems in algebraic geometry."
Lanzhou workshop on mathematics, 2017.8.21, "Localizing virtual structure sheaves by cosections."
FRG workshop on quasimaps and geometric representation theory, U. of Michigan, 2017.4.22, "Stability conditions on quasimaps and FJRW theory."
Yeongnam workshop on algebraic geometry, Yeongnam U., 2017.4.15, "On the geometry of Landau-Ginzburg correspondence."
Algebraic geometry conference, Busan, 2017.3.28, "Intersection theory - old and new."
Kickoff Symposium: New development of algebraic geometry viewed from theoretical physics, Kyoto, 2017.2.23, "Critical virtual manifolds and Donaldson-Thomas invariants."
Hong Kong geometry colloquium, HKUST, 2017.2.18, "On the geometry of critical virtual manifolds."
HKUST seminar on pure mathematics, 2017.2.16, "Stability conditions on linear systems and curve counting invariants."
Mathematics Inspired by String Theory 2017, CUHK, 2017.2.8, "Gauge theory and invariants in algebraic geometry."
5th Conference on moduli and birational geometry, Jeju, 2016.12.16, "Stability conditions on linear systems."
10th Seoul-Hokkaido conference on mathematics, Sapporo, 2016.12.5, "Gauge theory and invariants in algebraic geometry."
1st Seoul Seminar on Algebraic Geometry, Yonsei University, Seoul, 2016.9.30, "Gauge theory and invariants in algebraic geometry."
Second French-Korean conference on mathematics, Bordeaux, 2016.7.4~6, 5 lectures on "Critical virtual manifolds and Donaldson-Thomas invariants."
Workshop - curves on surfaces and 3-folds, EPF Lausanne, 2016.6.20, "Critical virtual manifolds and Donaldson-Thomas invariants."
Beijing geometry and physics colloquium, BICMR, Beijing, 2016.4.23: 2 lectures (1) curve counting via sheaf theory, (2) LG/CY correspondence via quasimaps.
Spring School on Moduli Theory, Shanghai Mathematics Center, 2016.4.17~21, 3 lectures on derived categories.
Workshop on Deformation and Moduli, 2016.1.20-23, Busan, 2 lectures on "Deformation of moduli of vector bundles over curves and the Fano visitor problem": (1) Fano visitor problem, (2) Deformation theory of moduli of vector bundles over curves.
CGP conference on String Field Theory of the B-model, 2016.1.6-9, Pohang, 3 lectures on "Categorification of Donaldson-Thomas invariants": (1) Critical virtual manifolds and perverse sheaves, (2) Gauge theory on Calabi-Yau 3-folds, (3) Gopakumar-Vafa invariant via categorification.
Hong Kong University of Science and Technology, Algebraic Geometry Seminar: (1) 2015.12.22, "Le Potier stability for quasimaps and wall crossing; (2) 2015.12.24, "Critical virtual manifolds and perverse sheaves."
ICTS at Bengalore, India, 2015.11.28, "Moduli spaces of sheaves on curves and Calabi-Yau 3-folds."
KIAS workshop on algebraic geometry, Songnisan, 2015.11.12, "Critical virtual manifolds and perverse sheaves."
Shanghai Center for Mathematical Sciences seminar, 2015.8.27, "On the Fano visitor problem."
Summer School on Algebraic Geometry, Anmyundo, 2015.8.20, "Landau-Ginzburg/Calabi-Yau correspondence."
International Workshop on Algebraic Geometry, Changchun, 2015.8.12, "Derived categories of irreducible symplectic varieties."
INdAM Italian-Korean Meeting on Algebraic Geometry, Palazzone di Cortona, 2015.7.1, "On the Fano visitor problem."
Workshop on non-abelian gauged linear sigma model and geometric representation theory, BICMR (Peking University), 2015.6.4, "Le Potier's stability for quasimaps and wall crossing."
Algebraic geometry seminar, KAIST, 2015.5.15, "On the Fano visitor problem."
SNU-Bielefeld joint workshop, 2015.2.27, "Landau-Ginzburg/Calabi-Yau correspondence via quasi-maps."
Recent trends and challenging problems, KIAS, 2014.12.5, "Problems on moduli and invariants."
Math Colloquium, Yonsei University, 2014.11.27, "Lines, conics and twisted cubics on Fano varieties."
Math Colloquium, Postech, 2014.11.14, "Lines, conics and twisted cubics in Fano varieties."
Algebraic geometry workshop, Pukyong University, 2014.8.22, "Lines, conics and twisted cubics in Fano 3-folds."
ICM satellite conference on algebraic geometry, Daejeon, 2014.8.7, "Gopakumar-Vafa invariant and perverse sheaves."
Geometry and Physics of Gauged Linear Sigma Model and its related topics, KIAS, 2014.7.29,"Cosection localized virtual fundamental classes."
CGP seminar, Pohang, 2014.7.14, "Gopakumar-Vafa invariant and perverse sheaves."
Summer school on algebraic geometry, Damyang, 2014.6.16~20, "Donaldson-Thomas invariants and categorification."
Landau-Ginzburg theory and Fano varieties Gyeongju, 2014.5.28, "Cosection localization of virtual fundamental classes."
Plenary talk, KMS spring meeting, 2014.4.25, "Categorification of Donaldson-Thomas invariants by perverse sheaves."
Math Colloquium, Seoul National University, 2014.4.10, "Categorification of Donaldson-Thomas invariants."
Math Colloquium, Ewha University, 2013.9.26, "Categorified Donaldson-Thomas invariants."
Pacific Rim Conference Mathematics, Sapporo, 2013.7.5, "Categorification of Donaldson-Thomas invariants."
Mathematics Colloquium, University of Central Florida, 2013.4.4, "Algebraic geometry and quantum entanglement."
Algebraic Geometry seminar, University of Illinois at Urbana-Champaign, 2013.3.12,"Gopakumar-Vafa invariants and perverse sheaves."
Workshop on moduli and birational geometry, Busan, 2012.7.9, “Hilbert scheme of curves and Seiberg-Witten invariant."
Algebraic Geometry seminar, 2011.12.28,HKUST, "Moduli spaces of quasi-maps with perfect obstruction theories."
Fudan-Sogang-Warwick workshop on algebraic geometry, Guiyang China, 2011.8.8, “Poincare invariants are Seiberg-Witten invariants.”
Conference in honor of David Giesekers 67th birthday on Moduli and Stability, Hangzhou China, 2011.7.20, “Moduli spaces of quasi-maps with perfect obstruction theories.”
Workshop on moduli and birational geometry, Gyeongju, 2011.7.11, “Wall crossing of moduli spaces and invariants."
Math Colloquium, Hangyang University, 2011.4.29, “곡선의 정의란 무엇인가?”
Workshop on Computational Aspects of Birational Geometry, NIMS, 2011.3.29, "Moduli spaces of quasi-maps to projective space with perfect obstruction theories."
MOS seminar, Newton Institute of Math. Sci., Cambridge, 2011.1.25, "Kirwan blow-ups and moduli spaces."
Math Colloquium, Seoul National University, 2010.12.2, “곡선의 정의에 관하여."
Waseda symposium on algebraic geometry, 2010.11.10~13,Waseda University, “Birational geometry of moduli spaces of curves.”
KMS meeting, 2010.10.22, Postech , “Localization of virtual cycles by cosections.”
Workshop on moduli and birational geometry, 2010.8.5~8, Postech , “Compactified moduli spaces of curves in projective varieties.”
NIMS workshop on Invariant Theory and Related Topics, 2010.2.17~19, Inha University, “Elementary construction of moduli spaces of pointed stable curves.”
KMS-AMS joint meeting, Ewha University, 2009.12.19, Moduli spaces of rational curves in projective space.”
RIMS Conference on higher dimensional algebraic geometry, 2009.12.15, RIMS-Kyoto, Japan, “On the birational geometry of moduli spaces of rational curves in projective space.”
Math Colloquium, Postech , 2009.11.27, “Rational curves in projective spaces.”
WCU inauguration workshop, Sogang University, 2009.7.17, “Twisted cubic curves.”
Algebraic Geometry seminar, Fudan University, 2009.6.17, “On the birational geometry of moduli spaces of rational curves in projective space.”
1st East Asia Symplectic Conference, Academia Sinica , Taiwan, 2009.5.6-5.10, “On the cohomolgy of hyperkahler quotients.”
Mathematics Colloquium, Seoul National University, 2009.4.23, “Moduli and Quotients."
Algebraic Geometry Seminar, Oxford University, 2009.2.10, “Moduli theoretic compactifications of the space of smooth rational curves."
NIMS-SNU Algebra Camp, Solbeach resort, 2009.2.4~2.5, “Introduction to quiver varieties.”
Workshop on moduli spaces, Sogang University, 2009.1.7, “ Moduli theoretic compactifications of the space of smooth rational curves.”
Math Colloquium, KAIST, 2008.12.5, “Enumerative geometry and moduli spaces.”
Algebraic Geometry in East Asia, KIAS, 2008.11.11~11.15, “Hilbert scheme of twisted cubics via stable maps.”
Gromov-Witten theory and related topics, KIAS, 2008.6.9~6.13, “ Moduli theoretic compactifications of the space of twisted cubics .”
2nd NIMS symposium on algebraic geometry, National Institute of Mathematics, 2008.5.12~5.15, “ Moduli theoretic compactifications of the space of twisted cubics .”
Mathematics Colloquium, 2008.4.30, Inha University, “히로나카의 특이점 해소정리에 대하여.”
Workshop on equivariant combinatorics , 2008.2.27~28, Ajou University, “Introduction to equivariant cohomology theory.”
Kyoto-SNU joint symposium, 2008.2. 11, Kyoto RIMS, “ Gromov-Witten invariants of varieties with holomorphic 2-forms.”
Workshop on moduli spaces, 2007.12.28, Sogang University, “Cohomology of moduli spaces of stable maps to projective space."
Algebraic Geometry and Commutative Algebra in Tokyo, 2007.12.10, Tokyo University,“ Gromov-Witten invariants of varieties with holomorphic 2-forms."
Workshop on Curve theory, 2007.11.24, Yeungnam University, “Hilbert scheme of curves in projective space via Kontsevich moduli space.”
Mathematics Colloquium, 2007.11.1, Ewha University, “대수기하학에서 세는 문제에 관하여."
Complex and algebraic geometry seminar, 2007.9.14, Osaka University, Japan, “Moduli space of stable maps to projective space via GIT.”
SNU-Orsay joint symposium, 2007.8.29, Orsay (Univ. Paris-sud ), France, “Moduli spaces of stable maps to Fano manifolds."
Pacific Rim Complex Geometry Conference, 2007.8.10, Kobe, Japan, “Moduli spaces of stable maps to some Fano manifolds."
SNU-Hokkaido joint symposium, 2007.2.22, Sapporo, “Gromov-Witten invariants of varieties with holomorphic two-forms."
Winter school on holomorphic symplectic geometry, 2007.2.5, PyongChang , “Holomorphic Symplectic Quotients.”
Mathematics Colloquium, 2006.11.16, Yonsei University, “Enumerative geometry and Gromov -Witten theory.”
Mathematics Colloquium, 2006.9.28, Hanyang University, “Enumerative geometry and intersection theory on moduli spaces."
Algebraic Geometry Seminar, 2006. 2.10, Stanford University, “ Hecke correspondence, stable maps and Kirwan’s partial desingularization .”
Algebraic Geometry Seminar, 2006. 1.30, University of Oxford, “Hecke correspondence, stable maps and partial desingularization."
Algebraic Geometry Progress Seminar, 2005. 11. 3, Stanford University, OGrady's work on irreducible symplectic varieties.”
AMS Summer Institute on Algebraic Geometry, Seattle, 2005.7.28, "Desingularizations of moduli spaces of rank 2 sheaves with trivial determinant."
Vector Bundles over Algebraic Curves, KIAS workshop (organized by J.-M. Hwang and S. Ramanan ), 2005.4.14, "Desingularizations of the moduli space of rank 2 vector bundles."
KAIST Symposium on Algebraic Geometry and Number Theory, 2005.2.4, "Remarks on hyperkahler geometry."
<I lost track of my talks before 2005.>