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Hello! I am a mathematics PhD candidate studying Extremal combinatorics and Graph theory.
I am currently in Department of Mathematics at Yonsei University, Korea. My supervisor is Joonkyung Lee.
I got a Bachelor's in Mathematics at Pohang University of Science and Technology.
I am one of the co-organizers of Discrete Analysis Seminar at Yonsei University and DAISY (Discrete Analysis & Insights Seminar at Yonsei).
📧 Email: jaehyeonseo (at) yonsei (dot) ac (dot) kr
📄 CV
Papers and Preprints
Papers and Preprints
Counting homomorphisms in antiferromagnetic graphs via Lorentzian polynomials. submitted (2025+).
with Joonkyung Lee and Jaeseong Oh.
Extended abstract accepted to FPSAC 2025.
(🔖 arxiv)
Transversal cycles and paths in tournaments. submitted (2024+).
with Debsoumya Chakraborti, Jaehoon Kim, and Hyunwoo Lee.
(🔖 arxiv)
Hamilton transversals in tournaments. Combinatorica 44, 1381–1400 (2024).
with Debsoumya Chakraborti, Jaehoon Kim, and Hyunwoo Lee.
On a rainbow extremal problem for color-critical graphs. Random Structures & Algorithms 64 (2024), 460–489.
with Debsoumya Chakraborti, Jaehoon Kim, Hyunwoo Lee, and Hong Liu.
On 1-subdivisions of transitive tournaments. Electronic Journal of Combinatorics (2022), P1.51.
with Jaehoon Kim and Hyunwoo Lee.
Wiley Top cited article Certificate.pdfTalks
Talks
(Aug 5, 2025) Counting homomorphisms in antiferromagnetic graphs via Lorentzian polynomials. RS&A 2025. TU Wien, Vienna, Austria.
(Jul 21, 2025) Counting homomorphisms in antiferromagnetic graphs via Lorentzian polynomials. FPSAC 2025. Hokkaido University, Sapporo, Japan.
(Jun 11, 2025) Graph homomorphism inequalities and Lorentzian polynomials. Combinatorics Student Seminar. Shanghai Center for Mathematical Science, Shanghai, China.
(📄 notice) (📜 slides)
(May 21, 2025) Graph homomorphism inequalities and Lorentzian polynomials. CanaDAM 2025. University of Ottawa, Ottawa, Canada.
(Mar 30, 2025) Graph homomorphism inequalities and Lorentzian polynomials. 4th East Asia Workshop on Extremal and Structural Graph Theory. Sun-Yat Sen University, Guangzhou, China.
(📄 notice) (📜 slides)
(Dec 27, 2024) Graph homomorphisms and Lorentzian polynomials. Sinchon Seminar of Graduates 5. Ewha Womans University, Seoul, Korea.
(📄 notice) (📜 slides)
(Oct 21, 2024) Graph homomorphisms and Lorentzian polynomials. KIAS Graduate Student Meeting in Pure Mathematics. KIAS, Seoul, Korea.
(Aug 29, 2024) Hamilton transversals in tournaments. 2024 Combinatorics Workshop. Chungbuk National University, Cheongju, Korea.
(Jul 30, 2024) Extremal graph theory and rainbow substructures. 2024 Korea Student Combinatorics Workshop. Gongju, Korea.
(Apr 29, 2023) Rainbow oriented Hamiltonian paths and cycles in tournaments. 2023 KMS Spring Meeting. Daejeon, Korea.
(📄 notice) (📜 slides)
(Mar 24, 2022) How can we find a rainbow subgraph? KAIST Math Graduate Student Seminar. Online.
(📄 notice) (📜 slides)
(Jan 18, 2022) A rainbow Turán problem for color-critical graphs. Discrete Math Seminar. IBS Discrete Mathematics Group (DIMAG). Daejeon, Korea.
(Dec 21, 2021) On multicolor extremal problems. 2021 Combinatorics Workshop. Yangpyeong, Korea.
Student Seminars
Student Seminars
Below are the student seminars in which I am participating and/or co-organizing.
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