The 7th Korea toric topology workshop, Feb 17~19, 2025, KAIST, Korea
Title: Combinatorics on partitioned permutohedra.
Mar 20--21, 2025, Gyeongsang National University, Korea
Title: [Colloquium] Finding Shape in Data: An Introduction to Topological Data Analysis
Title: [Seminar talk] Homology theories with stability properties in persistence modules.
[Colloquium] Mar. 27, 2025, SKKU, Korea
Title: The face number of a lattice polytope, and toric varieties.
2025 KMS Spring meeting, April 24--26, 2025, KAIST, Korea
Title: [Invited Lecture - Topology session] Cohomological homotopy rigidity problem for toric varieties
Title: [Special Session] Partitioned permutohedra: a bridge between toric varieties and regular Hessenberg varieties
East Asian Conference on Algebraic Topology, May 12--16, Hebei Normal University, China
Title: Homotopy rigidity for toric varieties.
Workshop on Interactions between Group Theory and Homotopy Theory - Focus Program on Algebraic Topology In memory of Fred Cohen, July 28--August 1, Fields Institue, Canada
Title: Cohomological homotopy rigidity problem for toric varieties.
2025 Summer Workshop on Low-Dimensional Topology and Related Topics, August 11--13, Kangwon National University, Korea
Title: Integral cohomology ring of (real) 4-dimensional toric varieties.
(Upcoming) [Colloquium] Nov. 6, Ewha Womans University, Korea,
Title: TBA.
The 4th POSTECH MINDS Workshop on Topological Data Analysis and Machine Learning, Jan. 30--Feb.2, 2024, POSTECH, Korea.
Title: Moment-angle complexes and persistent cohomology.
International Polyhedral products seminar, Feb. 01, 2024, Princeton University, USA
Title: Persistent double homology of moment-angle complexes.
Topology and Geometry of Torus actions and related Combinatorics, Mar. 28--31, 2024, Himeji, Japan
Title: Homotopy rigidity for quasitoric manifolds over the product of simplices.
2024년 영남수학회 정기총회 및 연구발표회, Jun. 28--29, 2024, PNU, Korea.
Title: Cohomological homotopy rigidity of toric varieties.
Combinatorics and Topology week at GIST, Jul. 08, 2024, GIST, Gwangju, Korea.
Title: Polyhedral products and persistent modules.
15th Shinchon Workshop on Algebraic Geometry (SWAG15), Jul. 12, 2024, Sogang University, Seoul, Korea.
Title: Integral cohomology ring of toric surfaces.
Focus Program on Toric Topology, Geometry and Polyhedral Products - Workshop on Toric Topology, Aug. 19--23, 2024, Fields Institute, Toronto, Canada.
Title: Integral cohomology ring of toric surfaces.
PNU Geometry and Topology Seminar, Sep. 23, 2024. Pusan National University, Busan, Korea.
Title: Polyhedral products and its applications to the persistent module.
2024 KMS annual meeting, Oct. 24--26, 2024, Sungkyunkwan University, Suwon, Korea.
Title: Homology theories with stability properties in persistence modules.
Topology seminar, Nov. 08, 2024, KNU, Daegu, Korea.
Title: Homology theories with stability properties in TDA
Workshop on topological data analysis: mathematics, physics and beyond, Feb. 8--10, 2023, KIAS, Korea.
Title: Persistent module of the double cohomology and its stability.
Toric Topology 2023 in Okayama, Feb. 21--22, 2023, Osaka Metropolitan University, Japan.
Title: Integral cohomology ring of 4-dimensional toric orbifolds.
[Seminar talk] Seminar sereis on DS, ML & SC, May 02, 2023, POSTECH, Korea.
Title: Stability theorem of bigraded persistence barcodes.
[Colloquium] June 02, 2023, Ajou University, Korea.
Title: Topology of singular toric varieties.
Algebraic Geometry & Topology Workshop, Jul. 12--14, 2023, Chungbuk National University, Cheongju, Korea.
Title: Integral cohomology ring of toric surfaces.
ICIAM 2023 in Tokyo, Aug. 20--25, 2023, Waseda University, Tokyo, Japan.
Title: Bigraded persistence barcodes and their stability.
The 4th Workshop on Topology and Geometry around Youngnam, Sep. 22--23, 2023, Daegu, Korea.
Title: The face numbers of lattice polytopes and toric varieties
[Seminar talk] Complex geomtery seminar, Jan. 27, 2022, IBS-CCG, Korea.
Title: Regular Hessenberg varieties and toric varieties.
[Seminar talk] Hessenberg Seminar in Osaka (online), Feb. 15, 2022, Osaka City university, Japan.
Title: Regular Hessenberg varieties and toric varieties.
[Seminar talk] Geometry Topology Seminar, Mar. 14, 2022, Pusan National University, Korea.
Title: The face numbers of lattice polytopes and toric varieties.
2022 KMS Spring meeting, April 28--29, 2022, Korea.
Title: Toric varieties with symmetries by reflections.
BK Colloquium: Rookies Pitch, May 3, 2022, Seoul National University, Korea.
Title: Topology of singular toric varieties.
PK^2 Topology workshop, May 29--June 1, 2022, Jeju Shinwha World, Korea.
Title: The face numbers of lattice polytopes and toric varieties.
강원경기수학회 학술대회 및 정기총회, June 10--11, 2022, 한경대학교, Korea.
Title: Toric varieties with symmetris by reflections.
The 6th Korea Toric topology workshop, July 11--13, 2022, KAIST, Korea.
Title: Double cohomology of moment-angle complexes.
2022 Global KMS International Conference, Oct. 18--21, 2022, 한국과학기술회관, Korea.
Title: The integral cohomology ring of toric surfaces.
PK^2 Topology workshop, Nov. 1--4, 2022, Pusan, Korea.
Title: Moment-angle complexes and persistent modules.
Geometry of Mandibular Movements and its Mathematical Modeling, Nov. 4--6, 2022, Jeju, Korea.
Title: Introduction to topological data analysis.
[Seminar talk] Transformation groups seminar, Dec. 14, 2022, University of Western Ontario, Canada.
Title: Toric surfaces with reflection symmetries.
Hessenberg varieties 2021 in Osaka (online), Feb. 20, 2021, Osaka City University, Japan.
Title: Pearson Conjecture-Regular Hessenberg varieties and toric orbifolds.
Toric Topology 2021 in Osaka (online), Mar. 24--26, 2021, Osaka, Japan.
Title: Homotopy Classification of 4-dimensional toric orbifolds.
2021 KMS Spring meeting, April 29--30, 2021, Korea.
Title: The homotopy classification of toric surfaces.
[Seminar Talk] International Polyhedral Products Seminar (online), May 05, 2021, Princeton University, USA.
Title: Secondary cohomology of a moment-angle complex.
[Seminar Talk] Osaka Prefecture University (joint seminars with Kyoto algebraic topology seminar, Kyushu Friday topology seminar, and Shinshu topology seminar), July 09, 2021, Japan.
Title: Homotopy Classification of toric surfaces.
2021 KMS Annual Meeting (Online), Oct. 20--22, 2021, Korea.
Title: Conic decomposition of a toric variety.
Topology of torus actions and related topics, Oct. 25--29, 2021, Sirius Mathematics Center, Sochi, Russia.
Title: Conic decomposition of a toric variety.
[Seminar Talk] Topology and Combinatorics seminar, Nov. 19, 2021, Ajou University, Korea.
Title: f-vectors, h-vectors and toric varieties.
[Seminar Talk] Feb. 21, 2020, McMaster University, Canada.
Title: The integral cohomology of certain singular spaces.
[Seminar Talk] Mar. 26, 2020, Fields Institute, Canada.
Title: Pearson Conjecture.
Workshop on Torus Actions in Topology (online), May 11--15, 2020, Fields institute, Canada.
Title: Topology of singular toric varieties.
[Seminar Talk] June 5, 2020, (Online) seminar on combinatorics, representation theory, symplectic/algebraic geometry related to torus actions, Korea.
Title: Pearson Conjecture: Toric orbifolds and Hessenberg varieties.
[Seminar Talk] June 23, 2020, KIAS Geometry, Topology & Dynamics Seminar, KIAS, Korea.
Title: Introduction to Polyhedral Products and Its Application to Geometric Group Theory.
[Seminar Talk] July 6, 2020, Three W's Seminar, KIAS, Korea.
Title: Toric varieties and Hessenberg varieties.
2020년도 강원경기 수학회 학술 발표회 및 정기 총회 (online), September 4, Korea.
Title: Partitioned Permutohedra.
2020 KMS Annual Meeting (online), Oct 23--24, 2020, Korea.
Title: Partitioned Weight Polytopes.
International conference: Topology and geometry of group actions (online), Nov. 18--22. 2020, HSE University, Russia.
Title: Homotopy Classification of 4-dimensional Toric Orbifolds.
Algebraic, Combinatorial and Toric Topology (online), Dec. 17--18, 2020, Steklov Mathematical Institute, Russia.
Title: Toric varieties associated with partitioned weight polytopes.
[Seminar Talk] Feb. 18, 2019, Ajou University, Korea.
Title: The q-CW structure on singular toric varieties and its application to Schubert Calculus.
[Colloquium] Feb. 27, 2019, Indian Institute of Technology-Madras, India.
Title: The piecewise algebra on a lattice polytope, toward Schubert Calculus.
Mini Workshop on Toric Topology and Related Topics, May 27, 2019, Korea Chamber of Commerce and Industry, Korea.
Title: Equivariant cohomology algebras of good contact toric manifolds.
[Seminar Talk] KIAS Geometry, Topology & Dynamics Seminar, Oct. 22, 2019, Korea.
Title: Manifolds with locally standard torus actions and their equivariant cohomology algebras.
2019 KMS Annual Meeting, Oct. 25--27, 2019, Hongik University, Korea.
Title: Equivariant cohomological rigidity of good contact toric manifolds.
Toric Topology 2019 in Okayama and workshop for young researchers, Nov. 18--22, 2019, Okayama University of Science, Japan.
Title: Topological contact toric manifolds.
[Seminar Talk] Nov. 28, 2019, KAIST, Korea.
Title: Manifolds with locally standard torus actions
[Seminar Talk] Dec. 22, 2019, Indian Institute of Technology-Madras, India.
Title: Manifolds distinguished by equivariant cohomology algebras.
[Seminar talk] Feb. 06, 2018, Indian Institute of Technology–Madras, India.
Title: Integral GKM-theory for orbifolds with torus actions.
2018 KMS Spring Meeting, Apr. 20--22, 2018, Kyunghee University, Korea
Title: Torsion in the Cohomology of Certain Singular Spaces.
Algebraic Topology, Combinatorics, and Mathematical Physics, May 24--30, 2018, Steklov Mathematical Institute, Russia.
Title: GKM-orbifolds and their equivariant cohomology rings.
[Seminar talk] Aug. 10, 2018, IBS-CGP, Korea
-Title: On the integral cohomology of certain singular spaces.
2018 POSCO Math Symposium, September 7, Hotel Interciti, Korea.
Title: Iterated Cofibrations on Certain Singular Spaces.
[Colloquium] Oct. 18. 2018, Indian Institute of Technology-Madras, India.
Title: Equivariant cohomology of torus orbifolds.
[Seminar talk] Jan. 18, 2017, Indian Institute of Technology--Madras, India.
Title: Integrality condition on the Stanley--Reisner ring.
2017 KMS Spring Meeting Apr. 28--30, 2017, Chosun University, Korea.
Title: Vanishing odd degree cohomology of toric orbifolds.
Princeton-Rider Workshop, On the Homotopy Theory of Polyhedral Products, May 29–June 1, 2017, Princeton university and Rider university, USA.
Title: The equivariant cohomology ring of toric orbifolds.
Open Chinese-Russian Conference, Algebraic Topology, Geometry and Combinatorics of Manifolds, Dec. 5--9, 2017, TSIMF in Sanya, China.
Title: Infinite family of equivariant formal toric orbifolds.
Toric Topology 2017 in Osaka, Dec. 11--15, 2017, Osaka City University, Japan.
Title: A rational CW structure on certain orbifolds.
Mini-workshop on Toric Topology in Okayama. May 21, 2016, Okayama University of Science, Japan.
Title: The topology of toric orbifolds.
(Seminar talk) 11, July, 2016, University of Calgary, Canada.
-Title: A multiplicative formula in the cohomology of toric orbifolds.
2016 KMS Annual Meeting. Oct. 22, 2016, Seoul National University, Korea.
Title: The weighted Stanley--Reisner ring of a simplicial fan.
The 43rd symposium on Transformation group theory. Nov. 17--19, 2016, Himeji Civic hall, Japan.
Title: The weighted Stanley--Reisner ring of a simplicial fan and equivariant cohomology of a singular toric variety.
The 4th Korea Toric Topology Workshop. Dec. 26--29, The Unipark of Jeju National University, Jeju Island, Korea.
Title: Wedge operation on toric orbifolds.
Geometry and topology: A conference in honor of Martin Bendersky's seventieth birthday and in commemoration of Sam Gitler, Mar. 18-21, 2015, Princeton University, USA.
Title: Torsion freeness and odd degree cohomology of toric orbifolds.
2015 KMS Annual Meeting, Oct. 23--25, 2015, Yonsei University, Korea.
Title: Equivariant formality of quasitoric orbifolds.
International Open Chinese-Russian Conference Torus Actions: Topology, Geometry and Number Theory, Oct. 26--29, 2015, Chinese Academy of Sciences, China.
Title: Orbifold towers and their integral cohomology ring.
The 3rd Korea Toric Topology Winter Workshop. Dec. 28--30, 2015, Gyeongju, Korea.
Title: A retraction of simple polytopes and homology of toric orbifolds.
Toric Topology 2014 in Osaka, Jan. 21--24, 2014, Osaka City University, Japan.
Title: The cohomology ring of toric orbifolds with integer coefficients.
2014 KMS Spring Meeting, Apr 24--26, 2014, Gangneung-Wonju National Univ, Korea.
Title: The integral cohomology ring of toric orbifolds and weighted projective towers.
Mini-workshop on toric topology, Aug. 4, 2014, Ajou University, Korea.
Title: The integral cohomology ring of weighted projective towers.
ICM2014 Satellite Conference, Topology of Torus Actions and Applications to Geometry and Combinatorics, Aug. 7--11, 2014, Daejeon Convention Center, Korea.
Title: The integral cohomology ring of toric orbifolds and weighted projective towers.
Toric Topology Student Workshop in Daejeon (Young researcher's seminar), Dec. 22--25, 2014, KAIST, Korea.
Title: Torsion freeness in the cohomology ring of quasitoric orbifolds.
2013 Korea Toric Topology Winter Workshop, Jan. 03 - 05. 2013. Kal Hotel in Jeju, Korea.
Title: M(J)-manifolds and its rigidity problem.
Algebraic topology seminar, Feb. 14, 2013, Princeton university, USA.
Title: On the conservation of (equivariant) homeomorphism classes of M(J)-manifolds.