Suyoung CHOI

• 최수영 (아주대학교)
• Email : schoi [a] ajou.ac.kr
• Tel : +82-31-219-3322
• Fax : +82-31-219-3720
• Department of Mathematics (수학과), Ajou University
• Department of AI Mobility (AI 모빌리티 공학과), Ajou University
• Office of Admissions (입학처), Ajou University
• Address 1 : 601, Paldalgwan, , Ajou University, 206, World cup-ro, Yeongtong-gu, Suwon, 16499, Rep. of Korea
• Address 2 : 102, Yulgokgwan, , Ajou University, 206, World cup-ro, Yeongtong-gu, Suwon, 16499, Rep. of Korea

Curriculum Vitae

Date and place of birth:

• 13 March 1982, Daegu, Korea.

Research Topic

• Toric topology, Transformation group theory
• Combinatorial topology
• Algebraic combinatorics
• Topological Data Analysis

Database

• MathSciNet (ID 857177)
• The Math Genealogy Project (ID 149272)
• The arXiv

Work Experiences

• Vice President for Admissions, Ajou University. (1 Mar 2023 -- 28 Feb 2025 (current))
• PI, 4단계 BK21 아주 수리과학 미래인재양성 교육연구팀 in Department of Mathematics, Ajou University. (1 Mar 2024 -- 31 Aug 2028 (current))
• Associate Vice President for Admissions, Ajou University. (1 Aug 2022 -- 28 Feb 2023)
• Director, Science Education Center for Gifted Student, Ajou University. (1 Mar 2019 -- 28 Feb 2023)
• Professor, Department of Mathematics, Ajou University. (1 Mar 2020 -- )
• Professor, Department of AI Mobility, Ajou University. (1 Sep 2022 -- )
• Chair, Department of Mathematics, Ajou University. (1 Mar 2020 -- 28 Feb 2022)
• Associate Professor, Department of Mathematics, Ajou University. (1 Mar 2015 -- 28 Feb 2020)
• Assistant Professor, Department of Mathematics, Ajou University. (1 Mar 2011 -- 28 Feb 2015)
• JSPS Postdoctoral Research Fellow, Department of Mathematics, Osaka City University. (1 Sep 2009 -- 19 Feb 2011)
• BK21 Post Doctor in Department of Mathematical Sciences, KAIST. (1 Mar 2009 -- 31 Aug 2009)

Math Community Services

• Associate Editor, The Korean Journal of Mathematics (ISSN: 1976-8605) (1 Sep 2019 -- 31 Aug 2025 (current))
• Chairman of KMO, Korean Mathematical Society (The 27th KMS Board Member) (1 Jan 2023 -- 31 Dec 2024 (current))
• Chairman of Mathematics and Culture Convergence Committee, The Korean Society of Mathematical Education, The 16th Executive Team (1 Jan 2023 -- 31 Dec 2024 (current))
• Organizer, Korean Mathematical Society (The 25th KMS Board Member) (1 Jan 2019 -- 31 Dec 2020)
• Organizer, Korean Mathematical Society (The 24th KMS Board Member) (1 Jan 2017 -- 31 Dec 2018)
• Organizer, Korean Mathematical Society (The 23rd KMS Board Member) (1 Jan 2015 -- 31 Dec 2016)
• Member of subcommittee for topology, Korean Mathematical Society (1 Mar 2015 -- 28 Feb 2023)

Education

• 3/2003 - 1/2009 : KAIST, Integrated M.S. & Ph.D. course, in Mathematics (Advisor: Prof. Dong Youp Suh)
• Thesis : Properties determined by Cohomology ring in Toric Topology
• 3/2000 - 2/2003 : KAIST, Bachelor of Science in Mathematics (magna cum laude)
• 3/1998 - 2/2000 : Daegu Science High School
• 3/1995 - 2/1998 : Gyeongsin Middle School

Awards

• 최우수편집자상, Kangwon-Kyungki Mathematisal Society, 20 June 2024
• 30th Annual Excellent Paper Award, The Korean Federation of Science and Technology Societies(KOFST), 3 July 2020 (Scrap 1 )
• 아주우수논문상, Ajou University, May 2018
• 2013 Sangsan Prize for young Mathematicians, The Korean Mathematical Society, 25 October 2013 (Scrap 1 2)
• TJ Park Science Fellowship (청암 과학 펠로 신진교수), POSCO TJ Park Foundation, 1 November 2012 (Scrap 1)
• JSPS Postdoctoral Research Fellowship, Japan Society for the Promotion of Science, 1 September 2009

Publication List

The papers with * mark are non-refereed papers.

Publications in Mathematics

2024+
• [42] 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.
• [41] Suyoung Choi, Hyeontae Jang, Mathieu Vallée, he characterization of (n-1)-spheres with n+4 vertices having maximal Buchstaber number, J. Reine Angew. Math. 811 (2024), 267--292.

2023
• [40] Suyoung Choi, Taekgyu Hwang, Gromov width of symplectic toric manifolds associated with graphs, Internat. J. Math. 24 (3) (2023), 2350013, 19 pp.

2022
• [39] Suyoung Choi, Mathieu Vallée, An algorithmic strategy for finding characteristic maps over wedged simplicial complexes, Pacific J. Math., 320 (2022), no. 1, 13–43.
• [38] Suyoung Choi, Mathieu Vallée, Cohomological rigidity of the connected sum of three real projective spaces, Proc. Steklov Inst. Math., 317 (2022), 178-188.

2021
• [37] Li Cai, Suyoung Choi, Integral cohomology groups of real toric manifolds and small covers, Mosc. Math. J., 21 (3), 467--492

2020
• [36] Li Cai, Suyoung Choi, Hanchul Park, On the KO-groups of toric manifolds, Algebr. Geom. Topol., 20 (2020) 2589--2607
• [35] Suyoung Choi, Hanchul Park, Multiplicative structure of the cohomology ring of real toric spaces, Homology Homotopy Appl., 22 (2020), no. 1, 139--157.

2019
• [34] 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.
• [33] 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.
(This paper was selected as the best Korean mathematical paper by KOFST in 2019.)
• [32] Suyoung Choi, Hanchul Park, Small covers over wedges of polygons, J. Math. Soc. Japan, 71 (2019), no. 3, 739--764.
• [31] Suyoung Choi, Kyoungsuk Park, Example of C-rigid polytopes which are not B-rigid, Math. Slovaca, 69 (2019), no. 2, 437--448.

2017
• [30] Suyoung Choi, Seonjeong Park, Strong cohomological rigidity of toric varieties, Proc. Roy. Soc. Edinburgh Sect. A.147 (2017), no. 5, 971--992.
• [29] 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.
• [28] Suyoung Choi, Hanchul Park, Wedge operations and torus symmetries II, Canad. J. Math. 69 (2017), no. 4, 767--789.
• [27] Suyoung Choi, Hanchul Park, On the cohomology and their torsion of real toric objects, Forum Math. 29 (2017), no. 3, 543--553.
• [26] Suyoung Choi, Hanchul Park, Wedge operations and a new family of projective toric manifolds, Israel J. Math. 219(1) (2017), 353--377.
• [25] Suyoung Choi, Boram Park, Seonjeong Park, Pseudograph and its associated real toric manifold, J. Math. Soc. Japan, 69(2) (2017), 693--714.
• [24] Suyoung Choi, Mikiya Masuda, Sang-il Oum, Classification of real Bott manifolds and acyclic digraphs Trans. Amer. Math. Soc. 369 (2017), 2987--3011.
• [23] 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)

2016
• [22] Suyoung Choi, Seonjeong Park, Projective bundles over smooth compact toric surfaces, Internat. J. Math. 27 (4) (2016), 1650032, 30 pp.
• [21] Suyoung Choi, Hanchul Park, Wedge operations and torus symmetries, Tohoku Math. J. (2), 68(1) (2016), 91--138.

2015
• [20] Suyoung Choi, Classification of Bott manifolds up to dimension 8, Proc. Edinb. Math. Soc. (2), 58(3) (2015), 653--659.
• [19] Suyoung Choi, Mikiya Masuda, Satoshi Murai, Invariance of Pontrjagin classes for Bott manifolds, Algebr. Geom. Topol., 15(2) (2015), 965--986.
• [18] Suyoung Choi, Hanchul Park, A new graph invariant arises in toric topology, J. Math. Soc. Japan, 67(2) (2015), 699-720.

2013
• [17] Suyoung Choi, Different moment-angle manifolds arising from two polytopes having the same bigraded Betti numbers, Algebr. Geom. Topol., 13(6) (2013), 3639--3649.

2012
• [16] Suyoung Choi, Mikiya Masuda, Classification of Q-trivial Bott manifolds, J. Symplectic Geom. 10(3) (2012), 447--462.
• [15] Suyoung Choi, Dong Youp Suh, Strong cohomological rigidity of a product of projective spaces, Bull. Korean Math. Soc. 49(4) (2012), 761--765.
• [14] 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.

2011
• [13] Suyoung Choi, Mikiya Masuda, Dong Youp Suh, Rigidity problems in toric topology, a survey, Proc. Steklov Inst. Math., 275 (2011), 177--190.
• [12] Suyoung Choi, Shintaro Kuroki, Topological classification of torus manifolds which have codimension one extended actions, Algebr. Geom. Topol. 11(5) (2011), 2655--2679.
• [11]* Suyoung Choi, On Petrie's theorem for torus manifolds, RIMS Kokyuroku, 1732 (2011), 95--100.
• [10] Suyoung Choi, Jang Soo Kim, Combinatorial rigidity of 3-dimensional simplicial polytopes, Int. Math. Res. Not. IMRN. 2011(8), (2011), 1935--1951.
• [9] Suyoung Choi, Dong Youp Suh, Properties of Bott manifolds and cohomological rigidity, Algebr. Geom. Topol. 11(2), (2011), 1053--1076.

2010
• [8] Suyoung Choi, Taras E. Panov, Dong Youp Suh, Toric cohomological rigidity of simple polytopes, J. London Math. Soc. 82(2), (2010), 343--360.
• [7] Suyoung Choi, The number of orientable small covers over cubes, Proc. Japan Acad., 86, Ser. A. (2010), no.6, 97--100.
• [6] 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.
• [5] Suyoung Choi, Mikiya Masuda, Dong Youp Suh, Topological classification of generalized Bott towers, Trans. Amer. Math. Soc. 362 (2010), 1097--1112.
• [4] Suyoung Choi, Mikiya Masuda, Dong Youp Suh, Quasitoric manifolds over a product of simplices, Osaka J. Math. 47 (2010), 109--129.

2009
• [3]* Suyoung Choi, Counting on real Bott manifolds, RIMS Kokyuroku, 1690 (2009), 69--71.

2008
• [2] Suyoung Choi, The number of small covers over cubes, Algebr. Geom. Topol. 8(4) (2008), 2391--2399.
• [1]* Suyoung Choi, Small covers over cubes, Trend in Math. 10 (2008), no. 1, 81--83.

Submitted Preprints in Mathematics

• [5] Suyoung Choi, Hyeontae Jang, Stellar subdivisions, wedges and Buchstaber numbers, arXiv:2407.12400, submitted.
• [4] Suyoung Choi, Younghan Yoon, Real toric manifolds associated with chordal nestohedra, arXiv:2407.11313, submitted.
• [3] Suyoung Choi, Hyeontae Jang, Mathieu Vallée, Toric wedge induction and toric lifting property for piecewise linear spheres with a few vertices, arXiv:2404.15600, submitted.
• [2] Suyoung Choi, Younghan Yoon, The cohomology rings of real permutohedral varieties, arXiv:2308.12693, submitted.
• [1] Suyoung Choi, Taekgyu Hwang, Hyeontae Jang, Strong Cohomological rigidity of Bott manifolds, arXiv:2202.10920, submitted.

Publications in other areas

• [4] 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, Geomechanics and Engineering, 36(1), (2024), pp. 1-8 .
• [3] Ho Kyoung Ko, Suyoung Choi, Shizuo Kaji, Who Has Given up on Mathematics? A data analysis, Asia Pacific Education Review (2021) 22:699--714
• [2] Suyoung Choi, Ahyun Goo, Ho Kyoung Ko, The Case of Polymath Activities Using Collective Intelligence, East Asian Mathematical journal, 37 (2021), No. 4, 523--541
• [1] Ho Kyoung Ko, Hyung Won Kim, Shizuo Kaji, Suyoung Choi, Elementary school students who give up on learning mathematics: Correlations with non-cognitive learner characteristics, J. Korea Soc. Math. Ed. Ser. C, 20 (2017), No. 2, 143--151.

Submitted Preprints in other areas

• [1]Meiyan Kang, Tae-Young Kim, Song-Hun Chong, Hee-Hwan Ryu, Suyoung Choi, Deep Learning Based Prediction of Underground Utility Locations Using Simulated Electrical Resistivity Survey Data and Novel Feature Engineering , submitted.

Conferences Proceedings

• [2] Hee-Hwan Ryu, Suyoung Choi, Song-Hun Chong, Tae-Young Kim, Jiyun Lee, Meiyan Kang, Machine learning-based classification of underground utility counts using electrical resistance numerical module, The 2024 World Congress on Advances in Civil, Environmental, and Materials Research (ACEM24).
• [1] Suyoung Choi, Hyeontae Jang, Mathieu Vallée, GPU Algorithm for Enumerating PL Spheres of Picard Number 4: Application to Toric Topology, 40th International Symposium on Computational Geometry (SoCG 2024), Leibniz International Proceedings in Informatics (LIPIcs), 293, pp. 41:1-41:15.

Publications : Books

• [7] 공통수학1, 공통수학2, 기본수학1, 기본수학2, 대수, 미적분1, 확률과통계 (Government-approved Textbooks for high school students), Donga, 2022개정 교육과정, 2024.
• [6] 수학1 (Government-approved Textbooks for middle school students), Donga, 2022개정 교육과정, 2024.
• [5] 미래사회를 선도할 꿈나무들을 위한 과학 CML, ISBN 9791125103820, Kyowoo, 2023.
• [4] 오일러의 보석 (Translation of Euler's gem written by David Richeson), ISBN 9791125102595, Kyowoo, 2018.
• [3] 드론, 수학으로 날다!, ISBN 9791125101994, Kyowoo, 2017.
• [2] 수학1, 수학2, 수학3 (Government-authorized Textbooks for middle school students), Kyohak, 2015개정 교육과정, 2017.
• [1] 수학1, 수학2, 수학3 (Government-approved Textbooks for middle school students), Kyohak, 2009개정 교육과정, 2013.

Patents

• [1] 위상 데이터 분석(TDA) 기법을 이용한 차량의 추돌 가능성 예측 방법 및 장치(Crash probability prediction method and apparatus for vehicle using TDA technique), Korea Patent 10-2020-0025618, filed in 28 Feb 2020, patent pending

Selected Research Grants

Individual Research Grant (selected) : Pure Mathematics

• 3/2019 - 2/2024 : Basic Science Research Program (중견연구자 지원사업), the national Research Foundation of Korea(NRF), about 160,000 USD per year
• Research Title : Establishment of real toric topology and classification of real toric manifolds
• 11/2016 - 10/2019 : Basic Science Research Program (일반연구자 지원사업(기본-후속)), the national Research Foundation of Korea(NRF), about 50,000 USD per year
• Research Title : Classification of topological spaces admitting torus actions
• 1/2013 - 12/2014 : TJ Park Science Fellowship (청암 과학 펠로), POSCO TJ Park Foundation, about 35,000 USD per year
• Research Title : Classification of toric manifolds
• 9/2012 - 8/2014 : Basic Science Research Program (일반연구자 지원사업(모험)), the national Research Foundation of Korea(NRF), about 50,000 USD per year
• Research Title : Classification of aspherical manifolds and real toric manifolds
• 9/2011 - 8/2016 : Basic Science Research Program (일반연구자 지원사업(기본)), the national Research Foundation of Korea(NRF), about 35,000 USD per year
• Research Title : Classification of topological spaces admitting torus actions
• 9/2009 - 2/2011 : JSPS Postdoctoral Research Fellowship, Japan Society for the Promotion of Science, September 1, 2009
• Research Title : Toric Topology and Combinatorics

Individual Research Grant (selected) : Industrial Mathematics

• 4/2021 - 12/2022 : 국토교통기술사업화지원사업, 국토교통부
• Joint work with (주)HBC
• 10/2018 - 12/2019 : R&D Project (창업성장기술개발사업), Ministry of SMEs and Startups, about 50,000 USD
• Joint work with (주)HBC
• Research Title : Detection of buried objects using Deep learning
• 7/2017 - 7/2018 : R&D Project, (주)HBC, about 50,000 USD
• Research Title : Research on theory of prediction technology for the information of steel tower foundation using electrical resistivity exploration
• 12/2016 - 8/2017 : R&D Project, (주)GK Engineering, about 10,000 USD
• Research Title : Research on sinkhole exploration by image and big-data analysis

Individual Research Grant (selected) : Education

• 4/2021 - 7/2021 : 과학기술인력양성 사업, 과학기술정보통신부
• Research Title : 수학인재양성 연구센터 운영방안 기획 연구
• 11/2019 - 5/2020 : 2019 과학영재교육정책기획연구 사업, 과학기술정보통신부
• Research Title : A preliminary study on the STEM education systmem for leading 4th Industrial revolution

Group Research Grant (selected) : Industrial Mathematics

• 10/2019 - 3/2022 : 산업전문인력양성사업 (P.I.: Prof. Bong Sup Song (Ajou Univ.)), 한국산업기술진흥원
• Research Title : 미래형자동차 R&D 전문인력양성사업
• 8/2013 - 12/2013 : R&D Project, (주)Daekyo, P.I.: Prof. Ho Kyoung Ko (Ajou Univ.)
• Research Title : Smart learning on Mathematics

Talks

Conference and workshop presentations

Activities

Activities : Conference organization

• Co-organize The 6th Korea Toric Topology Workshop, Daejeon, Korea, July 11--13, 2022
• Co-organize Workshop on Artificial Intelligence for Industrrial Mathematics, The Suites hotel Jeju, Jeju, Korea, June 18--21, 2022
• Co-organize a special session (toric topology), 2021 KMS Annual Meeting, online, Korea, October 20--22, 2021
• Co-organize 2019 International Joint Conference on AI & Data Science: Mathematics and Applications, Suwon Convention Center, Suwon, Korea, November 4--5, 2019
• Co-organize Ajou-Kyushu joint workshop on Industrial Mathematics, IMI Auditorum, Kyushu University, Fukuoka, Japan, December 21--22, 2018
• Co-organize Optimization and Learning Tutorial 2018, Ajou University, Suwon, Korea, March 24--31, 2018
• Co-organize The 4th Korea Toric Topology Winter Workshop, Jeju, Korea, December 26--29, 2016
• Co-organize The 3rd Korea Toric Topology Winter Workshop, Gyeongju, Korea, December 28--30, 2015
• Local organizer of The 6th East Asian Conference on Algebraic Topology (EACAT), Daejeon, Korea, December 1--4, 2015
• Co-organize The 2nd Korea Toric Topology Winter Workshop, Jeju, Korea, December 26--28, 2014
• Local organizer of 2014 Combinatorics workshop, Suwon, Korea, October 31--November 11, 2014
• Local organizer of ICM 2014 satellite conference : Topology of torus actions and applications to geometry and combinatorics
• Co-organize 2013 Korea Toric Topology Winter Workshop
• Organize a regular workshop on topology and combinatorics at Ajou University: Topology and Combinatorics Seminar since 2011~ current
• Co-organize Toric Topology Seminar in Osaka, 2009

Activities : IMO

• Leader of the Korea Mathematical Olympiad team at the 65th International Mathematical Olympiad (IMO), Bath, UK July 11--22, 2024
• Leader of the Korea Mathematical Olympiad team at the 64th International Mathematical Olympiad (IMO), Chiba, Japan, July 2--13, 2023
• Leader of the Korea Mathematical Olympiad team at The Cyberspace Mathematical Competition (CMC), July 12--14, 2020
• Deputy Leader of the Korea Mathematical Olympiad team at the 61st International Mathematical Olympiad (IMO), A distributed IMO administered from St Petersburg, Russian Federation, September 19--28, 2020
• Deputy Leader of the Korea Mathematical Olympiad team at the 60th International Mathematical Olympiad (IMO), Bath, UK, July 10--22, 2019
• Deputy Leader of the Korea Mathematical Olympiad team at the 59th International Mathematical Olympiad (IMO), Cluj-Napoca, Romania, July 03--14, 2018
• Deputy Leader of the Korea Mathematical Olympiad team at the 58th International Mathematical Olympiad (IMO), Rio de Janjeiroi, Brazil, July 12--23, 2017 (Scrap 1)
• Deputy Leader of the Korea Mathematical Olympiad team at the 8th Romanian Master of Mathematics (RMM), Bucharest, Romania, February 24--29, 2016
• Deputy Leader of the Korea Mathematical Olympiad team at the 56th International Mathematical Olympiad (IMO), Chiang Mai, Thailand, July 4--16, 2015 (Scrap 1)

Activities : Services in Social Media (selected)

• Interview at the main news at KBS : 30 Aug 2019, 아이즈원 탄생한 '프듀48'도 조작 의심 정황 포착
• Interview at the main news at SBS : 17 Aug 2014, 빅데이터 시대…'수학 전공'이 우대받는다
• Expert's consultation for the entertainment show, entitled 문제적남자, of tvN since January 2018 until July 2019
• Expert's consultation for POLYMATH project of a highschool-level math journal (수학동아) since May 2017

Supervising

Supervision of Students (Ph.D.)

• Taegon Kim (Ph.D. course March 2024 -- current) - Industrial Math track
• Younghan Yoon (Ph.D. course, March 2022 -- current)
• Meiyan Kang (Integrated M.S. & Ph.D. course, March 2020 -- current) - Industrial Math track
• Seonghyeon Yu (Integrated M.S. & Ph.D. course, March 2020 -- current)
• Hyuntae Jang (Ph.D. course. September 2020 -- current)
• Dr. Minkyu Kim (Ph.D. March 2023 -- August 2024)
• Dr. Jiyeon Moon (Ph.D. March 2016 -- August 2021)

Supervision of Students (Master)

• Jiyoon Lee (Master course. September 2021 -- August 2022) - Industrial Math track
• Hankyoung Lee (Master course. March 2019 -- February 2021) - Industrial Math track
• Hyuntae Jang (Master course. September 2018 -- August 2020)
• Taegon Kim (Master course. March 2017 -- February 2019) - Industrial Math track
• Sanggun Park (Master course. March 2012 -- February 2014)

Host for Researchers

• Dr. Xin Fu (September 2020 -- November 2022)
• Dr. Taekkyu Hwang (September 2019 -- March 2024)
• Mathieu Vallée
• Dong Gyu Lee (April 2019 -- July 2019)
• Dr. Seonjeong Park (June 2018 -- August 2019) (moved to Jeonju University as an assistant professor)
• Dr. Hyowon Park (March 2014 -- August 2014)
• Dr. Hanchul Park (March 2012 -- September 2013) (moved to Jeju National University as an assistant professor)

Teaching

Regular Lectures