Activities
Conference and workshop presentations
[2024]
Workshop on Toric Topology, Toronto, Canada, August 19 - 23, 2024
Title: Toric varieties arising from polygon dissections
TGTC Workshop 2024 in Himeji, Himeji, Japan, March 27 - 31, 2024
Title: Pattern avoidance and the regularity of h-Bruhat graphs
[2023]
2023 KSIAM Annual Meeting, Kimdaejung Convention Center, Gwangju, Korea, November 2 - 5, 2023
Title: Pattern Avoidance and Regularity of the Graphs Associated with Hessenberg Schubert Varieties
2023 KMS Annual Meeting (KMS Special Conference with 2022 Fields Medalists), SNU, Seoul, Korea, October 26 - 28, 2023
Title: Regularity of the graph for the natural torus action on a Hessenberg Schubert variety
Title: Topology and combinatorics of toric Schubert varieties
2023 AGT Workshop, CBNU, Cheongju, Korea, July 12-14, 2023
Title: Classification of toric Schubert varieties
2023 The 18th KWMS International Conference, KIAS, Seoul, Korea, June 26 - 27, 2023.
Title: Cohomology distinguishes toric Schubert varieties
[2022]
2022 Women in Algebraic Geometry, Daejeon Convention Center, Daejeon, Korea, February 16 - 18, 2022.
Title: $c_1$-cohomological rigidity on Fano generalized Bott manifolds
[2021]
2021 Combinatorics Workshop, The Bloomvista, Yangpyeong, Korea, December 20 - 22, 2021.
Title: Smooth toric Richardson varieties of Catalan type
Topology of torus actions and related topics, Sirius Mathematics Center, Sochi, Russia, October 25 - 29, 2021.
Title: Toric varieties arising from polygon triangulations
2021 KWMS International Conference (Virtual Conference), July 1-2, 2021.
Title: Toric varieties of Catalan type
2021 KMS Spring Meeting (Virtual Conference), April 29-30, 2021.
Title: Combinatorics on toric Richardson varieties
Toric topology 2021 in Osaka, March 24 - 26, 2021.
Title: Cohomological rigidity on Fano generalized Bott manifolds
Hessenberg varieties 2021 in Osaka by Zoom, February 20, 2021.
Title: Coxeter matroids and torus orbit closures in the flag varieties
[2020]
International Conference Topology and Geometry of Group Actions, Virtual conference, HSE University, Moscow, Russia, November 18 - 22, 2020.
Title: Uniqueness of a toric structure on a Fano Bott manifold
2020 KMS Annual Meeting, Virtual Conference, Korea, October 23 - 24, 2020.
Title: On Fano Bott manifolds
Combinatorics on flag varieties and related topics, KIAS, Seoul, Korea, January 15 - 17, 2020.
Title 1: Introduction to Hessenberg varieties
Title 2: From topology and geometry of Hessenberg varieties to combinatorics
[2019]
Toric Topology 2019 in Okayama, Okayama University of Science, Okayama, Japan, November 18 - 21, 2019.
Title: Generic torus orbit closures in Richardson varieties
2019 KMS Annual Meeting, Hongik University, Seoul, Korea, October 25 - 27, 2019.
Title: Richardson varieties with complexity ≤ 1
Japanese-Russian Seminar on Toric topology and Homotoy theory, Moscow, Russia, August 26 - 27, 2019.
Title: Torus orbit closures in the flag variety and Bott manifolds
Topology, Geometry, and Dynamics: Rokhlin - 100, The Euler International Mathematical Institute, Saint Petersburg, Russia, August 19 - 23, 2019.
Title: Torus orbit closures in Richardson varieties
2019 KKMS-YNMS International Joint Conference and Annual meeting, DGDC, Daegu, Korea, June 28 - 30, 2019.
Title: Richardson varieties and Bott manifolds
Women in Geometry and Topology, Postech, Pohang, Korea, June 24-28, 2019.
Title: Smooth toric Richardson varieties
Mini workshop on toric topology and related topics, Korea Chamber of Commerce and Industry, Seoul, Korea, May 27, 2019.
Title: Torus orbit closures in the flag variety
The 5th Korea Toric Topology Winter Workshop, The K-Hotel, Gyeongju, Korea, January 21 - 23, 2019
Title: Toric Richardson varieties and Bruhat interval polytopes
[2018]
The 22nd KIAS Combinatorics Workshop, Shilla Stay, Busan, Korea, December 19 - 22, 2018.
Title: Real toric varieties defined by graphs
Hessenberg varieties 2018 in Osaka, Osaka City University, Osaka, Japan, December 12 - 14, 2018.
Title: Toric Richardson varieties
Ajou Combinatorics Workshop, Ingenium, Suwon, Korea, October 26, 2018.
Title: Regular semi-simple Hessenberg varieties and faces of the Gelfand-Zetlin polytope
2018 KWMS International Conference, KIAS, Seoul, Korea, June 29 - 30, 2018.
Title: Real toric varieties arising from a simple graph
International conference "Algebraic Topology, Combinatorics, and Mathematical Physics" on occasion of Victor Buchstaber's 75th birthday (May 24 - 30)/International Seminar on Toric Topology and Homotopy Theory (May 31 - June 1), Steklov Institute, Moscow, Russia, May 24 - June 1, 2018.
Title: Betti numbers of real toric manifolds arising from a graph
2018 KMS Spring Meeting, Kyung Hee University, Seoul, Korea, April 20 - 22, 2018.
Title: Toric manifolds over a cube with one vertex cut
The 13th East Asian School of Knots and Related Topics, KAIST, Daejeon, Korea, January 29 - February 1, 2018.
Title: Cohomology of real toric manifolds defined by graphs
[2017]
International Open Chinese-Russian Conference--Algebraic Topology, Geometry and Combinatorics of Manifolds, Tsinghua Sanya International Mathematics Forum (TSIMF), Sanya, China, December 5 - 9, 2017.
Title: Real toric manifolds arising from a graph
The 44th Symposium on Transformation Groups, Fukui Phoenix Plaza, Fukui, Japan, November 16-18, 2017.
Title: Cohomology of real toric manifolds arising from a graph
Young Researchers in Homotopy Theory and Toric Topology, Kyoto University, Kyoto, Japan, August 4-5, 2017.
Title: Smooth toric varieties over a cube with one vertex cut
Princeton-Rider Workshop, On the Homotopy Theory of Polyhedral Products, Princeton University & Rider University, USA, May 29 - June 2, 2017.
Title: Real toric manifolds and shellable posets arising from graphs
RIMS Conference: Algebraic Topology focused on Transformation Groups, RIMS in Kyoto University, Kyoto, Japan, May 22-26, 2017.
Title: Shellable posets and real toric manifolds arisen from multigraphs
Topology in Australia and South Korea, The University of Melbourne, Melbourne, Australia, May 1-5, 2017.
Title: Cohomological rigidity of manifolds arisen from right-angled 3-dimensional polytopes
[2016]
The 4th Korea Toric Topology Winter Workshop, The Unipark of Jeju National University, Jeju, Korea, December 26 - 29, 2016.
Title: Cohomological rigidity of manifolds arisen from Pogorelov class
The 43rd Symposium on Transformation Groups, Himeji Civic Hall, Himeji, Japan, November 17-19, 2016.
Title: Cohomological rigidity of 6-dimensional quasitoric manifolds
One day seminar: Toric topology and related topics, Osaka City University, Osaka, Japan, November 16, 2016.
Title: Toric manifolds over cyclohedra
Toric Topology 2016 in Kagoshima, Kagoshima University, Kagoshima, Japan, April 19 - 22, 2016.
Title: Shellable posets arisen from pseudographs
[2015]
10th KIAS Combinatorics Workshop, The Bloomvista, Yangpyeong, Korea, December 21 - 23, 2015.
Title: A polynomial invariant of a pseudograph
2015 Annual Meeting of KMS, Yonsei University, Seoul, Korea, October 23 - 25, 2015.
Title: Small covers associated with pseudographs
Toric topology 2015 in Osaka, Osaka City University, Osaka, Japan, June 16 - 19, 2015.
Title: Real toric varieties corresponding to pseudographs
2015 KMS Spring Meeting, Pusan National University, Busan, Korea, April 24 - 25, 2015.
Title: Toric origami and b-symplectic structures on quasitoric manifolds
[2014]
NIMS-AJOU joint workshop on toric topology and computing, Unipark, Jeju, Korea, December 26-28, 2014.
Title: Origami structures on quasitoric manifolds
2014 Combinatorics Workshop, Ajou University, Suwon, Korea, October 31 - November 1, 2014.
Title: Origami templates for simple polytopes
2014 Annual Meeting of KMS, Yonsei University, Seoul, Korea, October 24 - 25, 2014.
Title: Cohomology ring of toric origami manifolds
ICM 2014, Coex, Seoul, Korea, August 13 - 21, 2014.
Torus manifolds and toric origami manifolds (Short communications)
Strong cohomological rigidity of quasitoric manifolds with second Betti number 2 (Poster)
ICM 2014 Satellite Conference: Topology of torus actions and applications to geometry and combinatorics, Daejeon Convention Center, Daejeon, Korea, August 7 - 11, 2014.
Title: Betti numbers of toric origami manifolds
Mini-workshop on toric topology, 2014, Ajou University, Suwon, Korea, July 4, 2014.
Title: Betti numbers of torus manifolds with acyclic faces
2014 KMS Spring Meeting, Gangneung-Wonju National University, Gangneung Campus, Korea, April 24 - 26, 2014.
Title: Betti numbers of toric origami manifolds
Toric Topology 2014 in Himeji, Egret Himeji, Himeji, Japan, April 6 - 7, 2014.
Title: Projective bundles over toric origami manifolds
Toric Topology 2014 in Osaka, Osaka City University, Osaka, Japan, January 21 - 24, 2014.
Title: Quasitoric manifolds and toric origami manifolds
[2013]
2013 Annual Meeting of KMS, University of Seoul, Seoul, Korea, October 24 - 26, 2013.
Title: Toric origami manifolds and multi-fans
International Open Chinese-Russian conference "Torus Actions: Topology, Geometry and Number Theory", Pacific National University, Khabarovsk, Russia, September 2 - 7, 2013.
Title: Strong cohomological rigidity of toric varieties
The Asian Mathematical Conference 2013, BEXCO, Busan, Korea, June 30 - August 4, 2013.
Title: Strong cohomological rigidity of toric varieties
2013 KWMS The 10th International Conference, KIAS, Seoul, Korea, June 20 - 21, 2013.
Title: Strong cohomological rigidity of toric varieties
2013 Korean Toric Topology Winter Workshop, Seogwipo KAL Hotel, Jeju, Korea, January 3 - 5, 2013.
Title: Strong cohomological rigidity of quasitoric manifolds
[2012]
Toric Topology 2012 in Osaka, Osaka City University, Osaka, Japan, November 16 -19, 2012.
Title: Strong cohomological rigidity problems for projective bundles over a toric manifold
2012 KMS Spring Meeting, Sookmyung Women's University, Seoul, Korea, April 28, 2012.
Title: Projective bundles over smooth compact toric surfaces
[2011]
Toric Topology 2011 in Osaka, Osaka City University, Osaka, Japan, November 28 - 30, 2011.
Title: Projective bundles over $4$-dimensional toric manifolds
2011 KMS Spring Meeting, Korea University, Seoul, Korea, April 30, 2011.
Title: $\mathbb{Q}$-trivial generalized Bott manifolds
[2010]
The 7th KWMS International Conference, Chungnam National University, Daejeon, Korea, June 21 - 22, 2010.
Title: Classification of quasitoric manifolds with $\beta_2=2$
[2009]
Toric Topology Seminar in Osaka, 2009, Osaka City University, Osaka, Japan, December 7 - 9, 2009.
Title: Classification of quasitoric manifolds over a product of simplices
Bratislava Topology Symposium "Group Actions and Homogeneous Spaces", Comenius University, Bratislava, Slovakia, September 7 - 11, 2009.
Title: Classification of quasitoric manifolds of $\beta_2=2$
2009 KMS Spring Meeting, Ajou University, Suwon, Korea, April 25, 2009.
Title: Cohomological rigidity for quasitoric manifolds of $\beta_2=2$
Invited Seminar Talks (selected)
$c_1$-cohomological rigidity on Fano generalized Bott manifolds, International Polyhedral Product Seminar, Princeton University, June 03, 2021, USA (Zoom)
Toric Richardson varieties, Colloquium, Department of Mathematics, Ajou University, May 14, 2021, Korea (Zoom)
Torus orbit closures in flag varieties and Coxeter matroids, T-seminars, December 11, 2020, Korea (Zoom)
Poincare polynomials of torus orbit closures in the flag variety, T-seminars, December 04, 2020, Korea (Zoom)
On generic torus orbit closures in Richardson varieties, University of Western Ontario, November 26, 2020, Canada (Zoom)
Topology and Combinatorics of Richardson varieties, KIAS, December 19, 2019, Korea
Generic torus orbit closures in Richardson varieties, Chungnam National University, September 20, 2019, Korea
Torus orbits in Richardson varieties, KIAS CMC, April 26, 2019, Korea
Topology of toric origami manifolds, National Cheng Kung University, November 18, 2015, Taiwan
Real toric manifolds over pseudograph associahedra, Ajou University, November 3, 2015, Korea
Cohomology of toric origami manifolds, Seoul National University, May 22, 2015, Korea
TDA Seminar presentations
[Zoom] Topological data analysis on neuroimaging data, HSE University, Moscow, Russia, May 15, 2020. (invited by Prof. Anton Ayzenberg)
위상수학의 응용: 오일러 지표를 중심으로 (Persistent Euler characteristic), Wonkwang University, Iksan, Korea, September 27, 2017.
Introduction to topological data analysis, Ajou University, Suwon, Korea, December 20, 2013.
Introduction to topological data analysis, University of Seoul, Seoul, Korea, December 11, 2013.
Introduction to topological data analysis, Seoul National University, Seoul, Korea, November 29, 2013.
Presentation (not belonging to the above category)
The 13th Symposium: 高等学校・大阪市立大学連携数学協議会, Osaka City University, Osaka, Japan, November 18, 2017.
Title: A very short introduction to Mathematical Education in Korea
One Day College, Hibarigaoka Gakuen High School, Osaka, Japan, June 24, 2017.
Title: 数学について(About Mathematics)
Member of organizing and program committees
2022 KWMS International Conference
Participation in international conferences (selected)
Introductory Workshop on Combinatorial Algebraic Geometry, Fields Institute, Toronto, Canada, August 15 - 19, 2016.
FPSAC 2015, KAIST, Korea, July 6 - 10, 2015.
Discrete, Computational and Algebraic Topology, University of Copenhagen, Copenhagen, Denmark, November 10 -14, 2014.
New Horizons in Toric Topology, University of Manchester, Manchester, UK, July 7 - 11, 2008.