Suyoung Choi

Suyoung Choi

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Curriculum Vitae

Suyoung Choi

Department of Mathematics, Ajou University | Suwon, Republic of Korea
Email: schoi [a] ajou.ac.kr | Tel: +82-31-219-3322
Website: https://schoimath.github.io

Research Interests

  • Toric topology, transformation groups
  • Combinatorial topology
  • Algebraic combinatorics
  • Topological Data Analysis

Affiliation

  • Professor | Mathematics, Ajou Univ. | Mar 2020-present
  • Associate Professor | Mathematics, Ajou Univ. | Mar 2015-Feb 2020
  • Assistant Professor | Mathematics, Ajou Univ. | Mar 2011-Feb 2015
  • JSPS Postdoctoral Research Fellow | Mathematics, Osaka City Univ. | Sep 2009-Feb 19, 2011
  • BK21 Postdoctoral Fellow | Mathematical Sciences, KAIST | Mar 2009-Aug 2009

Leadership & Administrative Roles

  • Principal Investigator | BK21 Education and Research Team in Mathematical Sciences, Ajou Univ. | Mar 2024-Aug 2028
  • Vice President for Admissions (입학처장) | Ajou Univ. | Mar 2023-Feb 2026
  • Director (원장) | Science Education Center for Gifted Students (아주대 과학영재교육원), Ajou Univ. | Mar 2019-Feb 2023

Professional Service

  • Review Board (RB) Member | National Research Foundation of Korea (NRF) | Nov 2024-Oct 2026
  • Director | Korean Mathematical Society | Jan 2023-Dec 2026
  • Editor | The Korean Journal of Mathematics (ISSN: 1976-8605) | Sep 2019-present
  • Leader | Korean IMO Team | 2023-2024

Education

  • KAIST | Integrated M.S./Ph.D. Program in Mathematics | Mar 2003-Jan 2009
  • KAIST | B.S. in Mathematics | Mar 2000-Feb 2003

Selected Publications

Mathematics

  1. Suyoung Choi, Hyeontae Jang, Stellar subdivisions, wedges and Buchstaber numbers, Algebr. Geom. Topol., 26 (2026) no. 2, 751–759.
  2. Suyoung Choi, Younghan Yoon, Real toric manifolds associated with chordal nestohedra, J. Combin. Theory, Ser. A, 217 (2026), Paper No. 106102, 38 pp.
  3. Suyoung Choi, Hyeontae Jang, Mathieu Vallee, Toric wedge induction and toric lifting property for piecewise linear spheres with a few vertices, J. London Math. Soc., 112 (2025), no. 1, Paper No. e70231, 24 pp.
  4. Suyoung Choi, Taekgyu Hwang, Hyeontae Jang, Strong cohomological rigidity of Bott manifolds, Adv. Math., 473 (2025), 110305.
  5. Suyoung Choi, Younghan Yoon, Seonghyeon Yu, The Betti numbers of real toric varieties associated to Weyl chambers of types E7 and E8, Osaka J. Math., 61 (3) (2024), 409–417.
  6. Suyoung Choi, Hyeontae Jang, Mathieu Vallee, The characterization of (n-1)-spheres with n+4 vertices having maximal Buchstaber number, J. Reine Angew. Math., 811 (2024), 267–292.
  7. Suyoung Choi, Taekgyu Hwang, Gromov width of symplectic toric manifolds associated with graphs, Internat. J. Math., 24 (3) (2023), 2350013, 19 pp.
  8. Suyoung Choi, Mathieu Vallee, An algorithmic strategy for finding characteristic maps over wedged simplicial complexes, Pacific J. Math., 320 (2022), no. 1, 13–43.
  9. Suyoung Choi, Mathieu Vallee, Cohomological rigidity of the connected sum of three real projective spaces, Proc. Steklov Inst. Math., 317 (2022), 178–188.
  10. Li Cai, Suyoung Choi, Integral cohomology groups of real toric manifolds and small covers, Mosc. Math. J., 21 (3), 467–492.
  11. Li Cai, Suyoung Choi, Hanchul Park, On the KO-groups of toric manifolds, Algebr. Geom. Topol., 20 (2020) 2589–2607
  12. Suyoung Choi, Hanchul Park, Multiplicative structure of the cohomology ring of real toric spaces, Homology Homotopy Appl., 22 (2020), no. 1, 139–157.
  13. Suyoung Choi, Shizuo Kaji, Hanchul Park, The cohomology groups of real toric varieties associated to Weyl chambers of type C and D, Proc. Edinb. Math. Soc., 62 (2019), 861–874.
  14. Soojin Cho, Suyoung Choi, Shizuo Kaji, Geometric representations of finite groups on real toric spaces, J. Korean Math. Soc., 56 (2019), no. 5, 1265–1283.
  15. Suyoung Choi, Hanchul Park, Small covers over wedges of polygons, J. Math. Soc. Japan, 71 (2019), no. 3, 739–764.
  16. Suyoung Choi, Kyoungsuk Park, Example of C-rigid polytopes which are not B-rigid, Math. Slovaca, 69 (2019), no. 2, 437–448.
  17. Suyoung Choi, Seonjeong Park, Strong cohomological rigidity of toric varieties, Proc. Roy. Soc. Edinburgh Sect. A., 147 (2017), no. 5, 971–992.
  18. Suyoung Choi, Boram Park, Hanchul Park, The Betti numbers of real toric varieties associated to Weyl chambers of type B, Chinese Ann. Math. Ser. B., 38 (2017), no. 6, 1213–1222.
  19. Suyoung Choi, Hanchul Park, Wedge operations and torus symmetries II, Canad. J. Math., 69 (2017), no. 4, 767–789.
  20. Suyoung Choi, Hanchul Park, On the cohomology and their torsion of real toric objects, Forum Math., 29 (2017), no. 3, 543–553.
  21. Suyoung Choi, Hanchul Park, Wedge operations and a new family of projective toric manifolds, Israel J. Math., 219(1) (2017), 353–377.
  22. Suyoung Choi, Boram Park, Seonjeong Park, Pseudograph and its associated real toric manifold, J. Math. Soc. Japan, 69(2) (2017), 693–714.
  23. Suyoung Choi, Mikiya Masuda, Sang-il Oum, Classification of real Bott manifolds and acyclic digraphs, Trans. Amer. Math. Soc., 369 (2017), 2987–3011.
  24. Suyoung Choi, Shizuo Kaji, Stephen Theriault, Homotopy decomposition of a suspended real toric space, Bol. Soc. Mat. Mex., (3), 23 (2017), no. 1, 153–161. (the memorial volume for Professor Gitler)
  25. Suyoung Choi, Seonjeong Park, Projective bundles over smooth compact toric surfaces, Internat. J. Math., 27 (4) (2016), 1650032, 30 pp.
  26. Suyoung Choi, Hanchul Park, Wedge operations and torus symmetries, Tohoku Math. J., (2), 68(1) (2016), 91–138.
  27. Suyoung Choi, Classification of Bott manifolds up to dimension 8, Proc. Edinb. Math. Soc., (2), 58(3) (2015), 653–659.
  28. Suyoung Choi, Mikiya Masuda, Satoshi Murai, Invariance of Pontrjagin classes for Bott manifolds, Algebr. Geom. Topol., 15(2) (2015), 965–986.
  29. Suyoung Choi, Hanchul Park, A new graph invariant arises in toric topology, J. Math. Soc. Japan, 67(2) (2015), 699–720.
  30. Suyoung Choi, Different moment-angle manifolds arising from two polytopes having the same bigraded Betti numbers, Algebr. Geom. Topol., 13(6) (2013), 3639–3649.
  31. Suyoung Choi, Mikiya Masuda, Classification of Q-trivial Bott manifolds, J. Symplectic Geom., 10(3) (2012), 447–462.
  32. Suyoung Choi, Dong Youp Suh, Strong cohomological rigidity of a product of projective spaces, Bull. Korean Math. Soc., 49(4) (2012), 761–765.
  33. Suyoung Choi, Seonjeong Park, Dong Youp Suh, Topological classification of quasitoric manifolds with second Betti number 2, Pacific J. Math., 256(1) (2012), 19–49.
  34. Suyoung Choi, Mikiya Masuda, Dong Youp Suh, Rigidity problems in toric topology, a survey, Proc. Steklov Inst. Math., 275 (2011), 177–190.
  35. Suyoung Choi, Shintaro Kuroki, Topological classification of torus manifolds which have codimension one extended actions, Algebr. Geom. Topol., 11(5) (2011), 2655–2679.
  36. Suyoung Choi, Jang Soo Kim, Combinatorial rigidity of 3-dimensional simplicial polytopes, Int. Math. Res. Not. IMRN., 2011(8), (2011), 1935–1951.
  37. Suyoung Choi, Dong Youp Suh, Properties of Bott manifolds and cohomological rigidity, Algebr. Geom. Topol., 11(2), (2011), 1053–1076.
  38. Suyoung Choi, Taras E. Panov, Dong Youp Suh, Toric cohomological rigidity of simple polytopes, J. London Math. Soc., 82(2), (2010), 343–360.
  39. Suyoung Choi, The number of orientable small covers over cubes, Proc. Japan Acad., 86, Ser. A. (2010), no.6, 97–100.
  40. Suyoung Choi, Jang Soo Kim, A combinatorial proof of a formula for Betti numbers of a stacked polytope, Electron. J. Combin., 17(1) (2010), #R9.
  41. Suyoung Choi, Mikiya Masuda, Dong Youp Suh, Topological classification of generalized Bott towers, Trans. Amer. Math. Soc., 362 (2010), 1097–1112.
  42. Suyoung Choi, Mikiya Masuda, Dong Youp Suh, Quasitoric manifolds over a product of simplices, Osaka J. Math., 47 (2010), 109–129.
  43. Suyoung Choi, The number of small covers over cubes, Algebr. Geom. Topol., 8(4) (2008), 2391–2399.

Applied Mathematics

  1. Meiyan Kang, Shizuo Kaji, Sang-Yun Lee, Taegeon Kim, Hee-Hwan Ryu, Suyoung Choi, Shape-Aware Topological Representation for Pipeline Hyperbola Detection in GPR Data, IEEE Sens. J., 26(3) (2026), 4313–4325.
  2. Hee-Hwan Ryu, Suyoung Choi, Eun-Soo Hong, Shin Kyu Choi, Prediction of steel tower foundation specifications using non-destructive testing method, Geomech. Eng., 41(2), (2025), 287–295.
  3. Hee-Hwan Ryu, Suyoung Choi, Song-Hun Chong, Tae-Young Kim, Jiyun Lee, Meiyan Kang, Machine learning-based prediction of underground utility counts using electrical resistance numerical data, Geomech. Eng., 41(1), (2025), 11–19.
  4. Tae-Young Kim, Hee-Hwan Ryu, Meiyan Kang, Suyoung Choi, Song-Hun Chong, Effect of geometry of underground structure and electrode on electrical resistance measurement: A numerical study, Geomech. Eng., 39(1), (2024), pp. 105–113.
  5. Jiyun Lee, Kyuwon Kim, Meiyan Kang, Eun-Soo Hong, Suyoung Choi, Void detection for Tunnel Lining Backfill using Impact-Echo Method based on Continuous Wavelet Transform and Convolutional Neural Network, Geomech. Eng., 36(1), (2024), pp. 1–8.
  6. Ho Kyoung Ko, Suyoung Choi, Shizuo Kaji, Who Has Given up on Mathematics? A data analysis, Asia Pac. Educ. Rev., (2021) 22:699–714.

Selected Awards

  • 최우수편집자상 | Kangwon-Kyungki Mathematical Society | Jun 20, 2024
  • 30th Annual Excellent Paper Award | The Korean Federation of Science and Technology Societies (KOFST) | Jul 3, 2020
  • 2013 Sangsan Prize for Young Mathematicians | The Korean Mathematical Society | Oct 25, 2013
  • TJ Park Science Fellowship (청암 과학 펠로 신진교수) | POSCO TJ Park Foundation | Nov 1, 2012

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