Yangjing Long (龙旸靖)

School of Mathematics and Statistics

Center China Normal University

152 Luoyu Road,

430079, Wuhan, China

Email: yangjing(at)mail(dot)ccnu(dot)edu(dot)cn

Personal information

Currently I’m an associate professor at School of Mathematics and Statistics, Central China Normal University. I received my PhD from the [Max-Planck Institute for Mathematics](https://www.mis.mpg.de/. My advisor was Jürgen Jost and Peter F. Stadler. My dissertation defense was on October 18th, 2014.

I completed my BS in mathematics at Shanghai Jiao Tong University.

My Erdős number is 2 (optimal).

My ORCID: https://orcid.org/0000-0001-5934-1326

Research Interests

My research interests are in graph theory and phylogenetic combinatorics, including combinatorics in the application of biology and quantum information, AI for Math and Science.

Here is my dissertation.

Grants

• 2025 – 2027 Principal Investigator, Open Research Project of Fuzhou University
  Funding: 50,000 RMB
• 2024 – 2026 Collaborator, Open Research Project of Central China Normal University (Cooperated with Chongqing University of Technology)
  Funding: 50,000 RMB
• 2025 – 2027 Collaborator, Open Research Project of Central China Normal University (Cooperated with Zhejiang Normal University)
  Funding: 20,000 RMB
• 2025 – 2026 Principal Investigator, Huawei Horizontal Project (Ascend Program)
  Funding: 40,000 RMB
• 2020 – 2022 Principal Investigator, Project Path Systems of Edge-Labeled Phylogenetic Trees, No. 20201191803
  Funding: 250,000 RMB, Youth Fund, National Natural Science Fund for Chinese Postdocs, China
• 2019 – 2020 Principal Investigator, Fundamental Research Funds for the Central Universities
  Funding: 100,000 RMB
• 2018 – 2019 Principal Investigator, Fundamental Research Funds for the Central Universities
  Funding: 100,000 RMB
• 2018 – 2021 Main Participant, Project Contextuality as a Resource in Quantum Computation (61771011)
  Funding: 520,000 RMB, National Natural Science Fund, CN.
• 2017 – 2020 Main Participant, Project Discrete Dynamics and Beyond (11671258)
  Funding: 480,000 RMB, National Natural Science Fund, CN.
• 2016 – 2017 Principal Investigator, Project Some problems on graph homomorphisms, No. 154463
  Funding: 50,000 RMB, National Natural Science Fund of Chinese Postdoc, CN.

  Selected Publications

• Inference of Phylogenetic Trees from the Knowledge of Rare Evolutionary Events, joint with M. Hellmuth, M. Hernandez-Rosales, P. F. Stadler, Journal of mathematical biology. 2018, 76(7):1623-1653.

• Fractal property of homomorphism order, joint with J. Fiala, J. Hubicka, J. Nesetril, European Journal of Combinatorics, 2017, 66: 101-109.

• Universality of Intervals of Line Graph Order, joint with J. Fiala, J. Hubika, European Journal of Combinatorics, 2014, 41, 221–231.

• Demosaicking recognition with applications in digital photo authentication based on a quadratic pixel correlation model., joint with Y. Huang. CVPR, 2008.

Other Publications

• A characterization of multigraphs reaching Goldbuer’s bound of chromatic index. joint with Qiong Fan, Chunxiang Wang, Shijing Wang, Journal of Graph theory, 2026, Volume 111, Issue 4, pages 99-112.

• Neighbor sum distinguishable $k$-edge colorings of joint graphs. Joint with Xiangzhi Tu, Peng Li, Aifa Wang. Journal of Combinatorial Optimization, 2025, Volume 49, Issue 1, pages 123–135.

• On the unit interval graphs which are paired-disjoint path coverable. Joint with P Li, T Liu, Discrete Mathematics, Algorithms and Applications, 2024, 16 (08), 2350105.

• Word-representability of split graphs, joint with Kitaev, S., Ma, J., & Wu, H. Journal of Combinatorics. 2022, 12(4), 725-746.

• Unrooted non-binary tree-based phylogenetic networks, joint with Mareike Fischer, Michelle Galla, Lina Herbst and Kristina Wicke, Discrete Applied Mathematics. 2021， 294：10-30.

• Exact-2-Relation Graphs, joint with P. F. Stadler. Discrete Applied Mathematics. 2020, 285: 212-226.

• Classes of tree-based networks, joint with Mareike Fischer, Michelle Galla, Lina Herbst and Kristina Wicke. Visual Computing for Industry, Biomedicine, and Art. 2020, 3(1):12.

• A Short Note on Undirected Fitch Graphs, joint with M. Geiß, M. Hellmuth, P. F. Stadler. The art of discrete and applied mathematics. 2018, 1(1).

• Reconstructing unrooted phylogenetic trees from symbolic ternary metrics, joint with S. Grünewald, Y. Wu, Bulletin of Mathematical Biology. 2018, 80: 1563–1577.

• Gaps in full homomorphism order, joint with J. Fiala, J. Hubicka, Electronic Notes in Discrete Mathematics. 2017, 61: 429-435.

• An universality argument for graph homomorphisms, joint with J. Fiala, J. Hubicka, Electronic Notes in Discrete Mathematics, 2015, 49: 643-649.

• Relations Between Graphs, joint with J. Hubicka, J. Jost, P. Stadler, L. Yang, Ars Mathematica Contemporanea, 2012, 6 no. 2, 323-350.

• On orthogonal polynomial approximation with the dimensional expanding technique for precise time integration in transient analysis. joint with Y. Huang, Commun. Nonlinear Sci. Numer. Simul. 2007, 12 no. 8, 1584–1603.

• The Correspondence between Zero-divisor Graphs with 6 Vertices and Their Semigroups. joint with Y. Huang, Journal of Algebra and its Applications. 2007, 6 no. 2, 287–290.

Preprint

• [Fixed-charge saturation and two-weight domination for the k-th Roman domination problem on interval graphs], joint with P. Li, submitted.

• Defining a phylogenetic tree with the minimum number of small-state characters, joint with T. Wang, submitted.

• The AT-number of the line graph of multicircuits and multicomplete bipartite graphs, joint with G. Chen, J. Kozik, X. Zhu, J. Zhu, submitted.

• The quantum homomorphism orders are universal, submitted.

• A Characterization of Level-k Realizability for Clustering Systemsjoint with S. Dai, submitted.

• Computing the Arc-Deletion Distance to Orchard Networks is NP-hard, joint with Z. Liu, P. Li, submitted.

• On the Generalized Nearest Neighbor Interchange Operations, joint with Stefan Gruenewald, Peter Humphries, Taoyang Wu.

• Constrained homomorphism partial orders, joint with J. Fiala, J. Hubicka.

• Proximity Measures for Classes of Phylogenetic Networks, joint with L. van Iersel, M. Jones, E. Julien, Y. Murakami.

Competition Guidance

• First Prize, 2023 Postgraduate Mathematical Modeling Competition (Top 1%)

Service

• Member, Specialized Committee on Math and AI, Chinese Mathematical Society

• Reviewer for MathSciNet, 2018-present.