Hi, I’m Zhouningxin Wang
I am now a lecturer at School of Mathematical Sciences, Nankai University in Tianjin, China .
I obtained my Ph.D. at IRIF, Université Paris Cité on May 24th, 2022, under the supervision of Reza Naserasr. I mainly work on colorings, flows, and homomorphisms of graphs and signed graphs. Here are my Ph.D. thesis and the defense slides. I was funded by FSMP Cofund MathInParis from 2018 to 2021 and by ANR HOSIGRA from 2021 to 2022.
Contact: wangzhou at nankai.edu.cn
Publications & Preprints
- Sensitivity conjecture and signed hypercubes. (With Sophie Laplante, Reza Naserasr, and Anupa Sunny)
Submitted. - Homomorphisms to small negative even cycles. (With Jiaao Li, Yongtang Shi, and Chunyan Wei)
Submitted. - Circular flows in mono-directed signed graphs. (With Jiaao Li, Reza Naserasr, and Xuding Zhu)
Submitted. [arXiv] - Signed bipartite circular cliques and a bipartite analogue of Grötzsch's theorem. (Journal version, with Reza Naserasr)
Submitted. [HAL], [arXiv]
Circular coloring of signed bipartite planar graphs (Extended Abstract). (With Reza Naserasr)
In: Nešetřil J., Perarnau G., Rué J., Serra O. (eds) Extended Abstracts EuroComb 2021. Trends in Mathematics, vol 14. Birkhäuser, Cham. [DOI] - Mapping sparse signed graphs to (K_2k, M). (With Reza Naserasr, Riste Škrekovski, and Rongxing Xu)
Accepted by Journal of Graph Theory. [HAL], [arXiv] - Circular (4-ε)-coloring of some classes of signed graphs. (With František Kardoš, Jonathan Narboni, and Reza Naserasr)
Accepted by SIAM Journal on Discrete Mathematics. [HAL], [arXiv] - Density of C_-4-critical signed graphs. (With Reza Naserasr and Lan-Anh Pham)
Journal of Combinatorial Theory, Series B, 153 (2022), 81-104. [DOI], [HAL], [arXiv] - Circular chromatic number of signed graphs. (With Reza Naserasr and Xuding Zhu)
Electronic Journal of Combinatorics, 28(2)(2021), #P2.44, 40 pages. [DOI], [HAL], [arXiv] - Bounding series parallel graphs and cores of signed K_4-subdivisions. (With Reza Naserasr)
Journal of Combinatorial Mathematics and Combinatorial Computing, (To the special volume for Gary MacGillivray), 116 (2021), 27–51. [HAL]
Talks & Visits
Conferences
- CGT 2022, China (online) [Link](中文) 19-22 Aug. 2022
Circular flow in Eulerian signed graphs - CSGT 2022, Prague, Czech Republic [Link], [Schedule] 25-29 July 2022
Circular flow in mono-directed Eulerian signed graphs - GTCA 2022, China (online) [Link](中文) 15-16 July 2022
Circular flow in mono-directed Eulerian signed graphs - Journées Graphes et Algorithmes (JGA 2021), Online [Link], [Schedule] 15-19 Nov. 2021
Circular (4-ε)-coloring of signed graphs [Slides] - Qilu Youth Forum, Shandong University, Jinan, China [Link] 28-30 Sept. 2021
Density of C_−4-critical signed graphs [Slides] - EUROCOMB 2021, Online [Link], [Schedule] 6-10 Sept. 2021
Circular coloring of signed bipartite planar graphs [Slides] - SIAM Conference on Discrete Mathematics (DM21), Online [Link], [Schedule] 20-23 July 2021
Density of C_−4-critical signed graphs [Abstract], [Slides] - CanaDAM 2021, Online [Link], [Schedule] 28 May 2021
Circular chromatic number of signed graphs [Slides]
Workshops and Seminars
- Workshop on “Eulerian subgraphs and related problems”, Tianjin Normal University and Nankai university, online 18-20 Nov. 2022
Circular flow in mono-directed Eulerian signed graphs - Tianjin workshop on “Frontier of Graph Theory” (天津图论前沿研讨会), Nankai university, online 05-06 Nov. 2022
Circular flow in mono-directed Eulerian signed graphs - Discrete Math seminar, Simon Fraser University, Burnaby, Canada [Link] 28 Oct. 2022
Circular flow in mono-directed Eulerian signed graphs [Slides] - Discrete Math seminar, University of Victoria, Victoria, Canada [Link] 20 Oct. 2022
Circular flow in mono-directed Eulerian signed graphs [Slides] - Association for Women in Math Student Chapter Seminar, Simon Fraser University, Burnaby, Canada [Poster] 19 Oct. 2022
Circular colorings and circular flows in signed graphs [Slides] - SCMS Combinatorics Seminar, Shanghai Center for Mathematical Sciences, Online [Link] 12 Aug. 2022
Density of C_−4-critical signed graphs [Slides] - HOSIGRA workshop, Frejus, France[Link] 12-26 June 2022
Circular Flow in monodiretced signed graphs - Graph theory seminar, West Virginia University, Online [Link] 14 Apr. 2022
Circular flow in mono-directed Eulerian signed graphs [Slides] - Nanjing Normal Univeristy Youth Forum, Online 11 Mar. 2022
Homomorphism of signed bipartite graphs - Graph theory seminar, Shandong University, Jinan, China [Poster] 30 Sept. 2021
Circular coloring of signed bipartite planar graphs [Slides] - Macedonian workshop on graph theory and application 2021, Online [Link] 16 Sept. 2021
Bipartite analogue of Grötzsch's theorem [Slides] - Mathematics seminar, Nankai University, Tianjin, China 14 Sept. 2021
Circular coloring of signed bipartite planar graphs [Slides] - Mathematics seminar, Nankai University, Online 20 May 2021
Circular coloring of signed graphs [Slides] - HOSIGRA workshop, IRIF, Online [Link] 3 May 2021
Mapping sparse signed graphs to (K_2k, M) [Slides] - Online lectures, Zhejiang Normal University [Link] 20 Mar., 27 Mar. & 3 Apr. 2021
Circular coloring of signed graphs [Slides] - Discrete mathematics seminar, University of Ljubljana, Online [Link] 2 Mar. 2021
Mapping sparse signed graphs to (K_2k, M) [Slides] - Graph theory seminar, IRIF, Online [Link] 2 Feb. 2021
Density of C_−4-critical signed graphs [Slides], [Video] - 2018 Winter International Graph Theory Workshop, Jinhua, China [Link] 5 Jan. 2019
Cores of signed K_4-subdivision [Slides] - Ph.D. student seminar, IRIF, Paris, France [Link] 31 Oct. 2018
Research Visits
- Visit Bojan Mohar at University of Ljubljana, Slovenia and Simon Fraser University, Canada 1 Sept.-21 Nov. 2022
- Visit Guanghui Wang at Shandong University, China 27-30 Sept. 2021
- Visit Xuding Zhu at Zhejiang Normal University, China 22-26 Sept. 2021
- Visit Jiaao Li at Nankai University, China 13-18 Sept. 2021
- Visit Riste Škrekovski at University of Ljubljana, Slovenia 30 Nov.-8 Dec. 2019 & 19 Jan.-2 Feb. 2020
- Visit Penny Haxell at University of Waterloo, Canada 17 Jun.-26 Aug. 2019
- Visit Guanghui Wang at Shandong University, China 25-27 Feb. 2019
- Visit Xuding Zhu at Zhejiang Normal University, China 20 Dec. 2018-4 Mar. 2019
You might also have seen me at
40 années d'algorithmique de graphes (11-12 Oct. 2018 Paris, France), ANR DISTANCIA Workshop (27-29 Mar. 2019 Paris, France), Workshop on Graph Compression and Compact Representations (9-10 Sept. 2019 Paris, France), Célébration médaille d'argent du CNRS (16 Dec. 2019 Paris, France), 22e Journées Graphes et Algorithmes (16-18 Nov. 2020, Online), ICALP 2022 (4-8 July 2022 Paris, France), GROW 2022 (19-22 Sept. 2022 Koper, Slovenia)...
Education & Awards
Education
- Université Paris Cité (Paris, France) 2018-2022 Ph.D. in Theoretical Computer Science
- Shanghai Jiao Tong University (Shanghai, China) 2016-2019 Master in Mathematics
- Sorbonne Université (Paris, France) 2017-2018 Master in Mathematics and Applications
- Shandong University (Jinan, China) 2012-2016 Bachelor in Mathematics and Applied Mathematics
Honors & Awards
- MathInParis Cofund: Ph.D. fellowship within the framework of the European Horizon 2020 program 2018
- First-Class Scholarship for Outstanding Students in SJTU 2017
- Outstanding Graduates Awards of ShanDong Province (top 10%) 2016
- Shandong University President’s Scholarship (top 1%) 2015
- National Scholarship (the Ministry of Education of China) (top 3%) in 2 consecutive years 2013-2014
- First-Class Scholarship for Outstanding Students (top 5%) in SDU in 3 consecutive years 2013-2015
Languages & Hobbies
- Languages: Chinese(native speaker); English(fluent); French(elementary).
- Leisure activities: Hiking; Jogging; Board game
Referee for the journals
Discrete Applied Mathematics; Discrete Mathematics; Discussiones Mathematicae Graph Theory; Electronic Journal of Combinatorics; EuroComb 2021 (Conference); European Journal of Combinatorics; Graph and Combinatorics; Theoretical computer science.
Useful links
The Grammar According to West (Douglas B. West) Links to Combinatorial Conferences (Douglas B. West) Combinatorics Lectures Online (Paul Seymour)
