I am a June E Huh Fellow (KIAS Assistant Professor) at Korea Institute for Advanced Study. I got my PhD at Seoul National University under the supervision of Professor Young-Hoon Kiem.
Email: hyeonjun.park.22@gmail.com (hyeonjunpark@kias.re.kr)
Period sheaves via perverse pullbacks (with A. Khan, T. Kinjo, P. Safronov)
Perverse pullbacks (with A. Khan, T. Kinjo, P. Safronov)
Cosection localization via shifted symplectic geometry (with Y.-H. Kiem)
Cohomological Hall algebras for 3-Calabi-Yau categories (with T. Kinjo, P. Safronov)
Counting surfaces on Calabi-Yau 4-folds II: DT-PT0 correspondence (with Y. Bae, M. Kool)
Counting surfaces on Calabi-Yau 4-folds I: Foundations (with Y. Bae, M. Kool) to appear in Geom. Topol.
The stacky concentration theorem (with D. Aranha, A. Khan, A. Latyntsev, C. Ravi)
Virtual localization revisited (with D. Aranha, A. Khan, A. Latyntsev, C. Ravi) Adv. Math. (2025)
Virtual pullbacks in Donaldson-Thomas theory of Calabi-Yau 4-folds
Localizing virtual cycles for Donaldson-Thomas invariants of Calabi-Yau 4-folds (with Y.-H. Kiem) J. Algebraic Geom. (2023)
Virtual intersection theories (with Y.-H. Kiem) Adv. Math. (2021)
An introduction to virtual cycles---via derived algebraic geometry KIAS Springer Series in Mathematics (2025)
An introduction to shifted symplectic structures (with J. You) KIAS Springer Series in Mathematics (2025)
Virtual fundamental classes of the vanishing loci of cosections (with Y.-H. Kiem) KIAS Springer Series in Mathematics (2026)
Virtual pullbacks, cosection localization, and Donaldson-Thomas theory of Calabi-Yau 4-folds thesis (2022)
Moduli spaces, virtual invariants and shifted symplectic structures 2023 2024 2025 2026
Geometry meets Physics – Exploring Calabi-Yau fourfolds and beyond
Upcoming
Enumerative Geometry and Categorification, ICTS, Bangalore (Jul 2026)
Moduli and Invariants - a celebration of Professor Jun Li's 65th Birthday, Jeju island (Mar 2026)
Tokyo-Seoul Conference in Mathematics 2025, University of Tokyo (Dec 12 or 13)
Meeting of young Enumerative Geometers, Jeonju "Counting surfaces on Calabi-Yau 4-folds" (Nov 13)
Korean-Taiwan Enumerative Geometry Meeting 2025, Academia Sinica "Lagrangian classes" (Nov 4)
International Workshop on Calabi-Yau Crystals and BPS Counting, UNIST "Lagrangian classes" (Oct 31)
2025
ETH Zurich "Symplectic pushforwards and 3CY CoHA" (Oct 8), "Lagrangian classes and GLSM CohFT" (Oct 17)
Cambridge "Symplectic pushforwards and Lagrangian classes" (Oct 1)
Counting Invariants and Enumerative Geometry, Brin Center, "Lagrangians classes" (Sep 25)
University of Edinburgh "Shifted symplectic pushforwards" (Sep 17)
Imperial College "Shifted symplectic pushforwards" (Aug 1)
Yonsei University "Introduction to virtual cycles" (Jul 3, Jul 4)
Workshop on moduli spaces, virtual invariants and shifted symplectic structures 2025, KIAS, "Lagrangian classes, Donaldson-Thomas theory, and gauged linear sigma models" (Jun 18)
Shanghai Institute for Mathematics and Interdisciplinary Sciences "Lagrangian classes, Donaldson-Thomas theory, and gauged linear sigma models" (Jun 12)
University of Michigan "Shifted symplectic pushforwards" (Feb 21)
Recent developments in higher genus curve counting, Simons Center, "Symplectic pushforwards and DT theory" (Feb 14)
Séminaire Darboux, Jussieu "Darboux theorem for shifted symplectic stacky fibrations" (Feb 6)
Utrecht university "Shifted symplectic pushforwards" (Feb 4)
2024
Enumerative Geometry in East Asia 2024 "Symplectic pushforwards and DT theory" (Dec 16)
KIAS "Cohomological Hall algebras for 3-Calabi-Yau categories" (Nov 21)
Mini-workshop on shifted symplectic structures and enumerative geometry, Postech, "Cohomological Hall algebras", Virtual Lagrangian cycles", "Shifted symplectic pushforwards" (Oct 28, Oct 29)
Yonsei University "Cohomological Hall algebras for Calabi-Yau 3-folds" (Oct 16)
Seoul-Taipei enumerative geometry meeting "Categorification of enumerative geometry" (Oct 2)
Workshop on moduli spaces, virtual invariants and shifted symplectic structures 2024, KIAS, "Shifted symplectic pushforwards" (Jul 22)
Workshop on Sheaf Stable Pairs and Birational Geometry, BIMSA (online), "Counting surfaces on Calabi-Yau 4-folds" (Jun 8)
Online Geometry and Physics Seminar, Zhejiang University (online), Virtual Lagrangian cycles" (May 28)
Kyoto University "Shifted symplectic pushforwards" (Apr 22)
Workshop on Enumerative Geometry, Shanghai Center for Mathematical Sciences, "Virtual Lagrangian cycles" (Mar 13)
Mirror Symmetry and Related Topics, KIAS, "Virtual Lagrangian cycles" (Jan 17)
Symposium in Algebraic Geometry, Busan, "Shifted symplectic pushforwards" (Jan 4)
2023
Junior Trimester Program: Algebraic geometry: derived categories, Hodge theory, and Chow groups, Hausdorff Research Institute for Mathematics, "Minicourse on shifted symplectic structures" (Oct 9, Oct 11, Oct 13)
Workshop on Quantum Analysis 2023, Sokcho, "A Darboux theorem and virtual Lagrangian cycles for (-2)-shifted symplectic fibrations" (July 13)
Workshop on moduli spaces, virtual invariants and shifted symplectic structures, KIAS, "A Darboux theorem and virtual Lagrangian cycles for (-2)-shifted symplectic fibrations" (Jun 26)
Workshop on moduli spaces, virtual invariants and shifted symplectic structures (School), KIAS, "An introduction to virtual fundamental cycles via derived algebraic geometry" (Jun 20, Jun 22)
Yeungnam Seminar on Algebraic Geometry X, Busan, "Introduction to virtual fundamental cycles and shifted symplectic structures" (Apr 14)
Kavli IPMU "Donaldson-Thomas theory of Calabi-Yau 4-folds via derived algebraic geometry" (Mar 7)
Imperial College "Counting surfaces on Calabi-Yau 4-folds" (Feb 20)
Toulouse Universite "Donaldson-Thomas theory of Calabi-Yau 4-folds via derived algebraic geometry" (Feb 14)
Utrecht University "Cosection localization via derived algebraic geometry" (Feb 8)
ETH Zurich "Virtual pullbacks in Donaldson-Thomas theory of Calabi-Yau 4-folds" (Feb 6)
2022
Seminar of Algebraic Geometry in East Asia, online, "Counting surfaces on Calabi-Yau 4-folds" (Dec 23)
KIAS "Counting surfaces on Calabi-Yau 4-folds" (Dec 22)
Sinchon Workshop on Algebraic Geometry "Counting surfaces on Calabi-Yau 4-folds" (Dec 15)
Current Developments in Algebra and Topology, Buyea, "Counting surfaces on Calabi-Yau 4-folds" (Oct 28)
Rookies Pitch, Seoul National University, "Counting surfaces on Calabi-Yau 4-folds" (Oct 18)
Seoul National University "Introduction to derived algebraic geometry" (Sep 6, Sep 7)
Workshop on Geometry of Moduli Spaces, Gangneung, "Counting surfaces on Calabi-Yau 4-folds" (Aug 27)
Workshop on Quantum Analysis 2022, Gangneung, "Counting surfaces on Calabi-Yau 4-folds" (Aug 24, Aug 25)
2021
KIAS, online, "Virtual pullbacks in Donaldson-Thomas theory of Calabi-Yau 4-folds" (Nov 11)
2021 허식교수 기념 심포지엄, Seoul National University, "Virtual pullbacks in Donaldson-Thomas theory of Calabi-Yau 4-folds" (Nov 9)
Daegu Algebraic Geometry Seminar on Moduli Spaces of Curves and Surfaces "Virtual pullbacks in Donaldson-Thomas theory of Calabi-Yau 4-folds" (Aug 17)
KIAS, online, "Localizing virtual cycles for Donaldson-Thomas invariants of Calabi-Yau 4-folds" (Feb 25)
2020
Recent Advances in Moduli and Invariants, online, "Virtual intersection theories" (Sep 22)
IBS-CGP "Virtual intersection theories" (Jan 16)
2019
Inaugural France-Korea Conference, Bordeaux "Virtual intersection theories" (Nov 26)
KMS Annual Meeting "Virtual intersection theories" (Oct 27)
2026
(Jul 6 - 10) ICTS, Bangalore, India - Enumerative Geometry and Categorification
(Jun 28 - Jul 4) Samcheok, Korea - Summer school on moduli spaces, virtual invariants and shifted symplectic structures
(Mar - May, tentative) University of Michigan, US (Host: Younghan Bae)
(Mar 23 - 27) Jeju island, Korea - Moduli and Invariants - a celebration of Professor Jun Li's 65th Birthday
2025
(Dec 29 - Jan 23) Yonsei University, Korea (Host: Woonam Lim)
(Dec 11 - 14) University of Tokyo, Japan - Tokyo-Seoul Conference in Mathematics 2025
(Nov 17 - Dec 24) RIMS, Kyoto, Japan (Host: Tasuki Kinjo)
(Nov 13 - 16) Jeonju, Korea - Meeting of young Enumerative Geometers
(Nov 8 - 13) Seoul National University, Korea (Host: Jeongseok Oh)
(Nov 2 - 8) Academia Sinica, Taiwan - Korean-Taiwan Enumerative Geometry Meeting 2025
(Oct 29 - Nov 2) UNIST, Ulsan, Korea - International Workshop on Calabi-Yau Crystals and BPS Counting
(Oct 2 - 28) ETH, Zurich, Switzerland (Host: Denis Nesterov)
(Sep 30 - Oct 2) Cambridge, UK (Host: Renata Picciotto)
(Sep 22 - 26) Brin Center, US - Counting Invariants and Enumerative Geometry
(Aug 4 - Sep 30) University of Edinburgh, UK (Host: Pavel Safronov)
(Jul 28 - Aug 4) Imperial College, London, UK (Host: Richard Thomas)
(Jul 2 - 19) Yonsei University, Korea (Host: Woonam Lim)
(Jun 10 - 14) SIMIS, Shanghai, China (Host: Arkadij Bojko)
(Feb 15 - 28) University of Michigan, US (Host: Younghan Bae)
(Feb 9 - 15) Simons Center, US - Recent developments in higher genus curve counting,
(Feb 5 - 8) Jussieu, Paris, France (Host: Tudor Padurariu)
(Jan 30 - Feb 5) Utrecht University, Utrecht, Netherlands (Host: Martijn Kool)
(Jan 27 - 30) Zeist, Netherland - Geometry meets Physics – Exploring Calabi-Yau fourfolds and beyond
2024
(Apr 16 - 28) RIMS, Kyoto, Japan (Host: Tasuki Kinjo)
(Mar 10 - 16) SCMS, Shanghai, China - Workshop on Enumerative Geometry
2023
(Sep 11 - Nov 20) Hausdorff Research Institute for Mathematics, Bonn, Germany - Junior Trimester Program (Algebraic geometry: derived categories, Hodge theory and Chow groups)
(Mar 5 - 11) IMPU, Tokyo, Japan (Host: Yukinobu Toda)
(Feb 18 - 24) Imperial Colledge, London, UK (Host: Richard Thomas)
(Feb 12 - 18) Toulouse, France (Host: Bertrand Toen)
(Feb 7 - 12) Utrecht University, Utrecht, Netherlands (Host: Martijn Kool)
(Feb 4 - 7) ETH, Zurich, Switzerland (Host: Rahul Pandharipande)
2022
(Nov 3 -11) RIKEN iTHEMS, Tokyo, Japan (Host: Yalong Cao)