Professor Alex Fink

Profile

Alex Fink is Professor in Pure Mathematics in the School of Mathematical Sciences. He has interests in combinatorics, algebra and geometry, especially matroid theory and tropical geometry.

Prof Fink holds a PhD from UC Berkeley, and prior to this post was a postdoctoral researcher at North Carolina State University. His research has been supported by EPSRC. He serves on the editorial boards of the Bulletin and Journal of the London Mathematical Society and of Theoretical Computer Science A, and was joint chair of the programme committee of Formal Power Series and Algebraic Combinatorics 2017.

Research

Research Interests:

See Alex Fink’s research profile pages including details of research interests, publications, and live grants.

Member of the LMS Scheme 3 research group in Tropical Mathematics & its Applications and the UK Applied Algebra and Geometry research network.

Publications

• Ferroni L, Fink A (2025). The polytope of all matroids Selecta Mathematica nameOfConference.

  10.1007/s00029-025-01103-z

  https://qmro.qmul.ac.uk/xmlui/handle/123456789/110201
• Fink A, Shaw K, Speyer DE (2025). The Omega Invariant of a Matroid International Mathematics Research Notices nameOfConference.

  10.1093/imrn/rnaf329

  https://qmro.qmul.ac.uk/xmlui/handle/123456789/112760
• Fink A (2025). (Delta-)matroid Polytopes and Valuative Invariants journal nameOfConference.

  10.1007/978-3-031-76738-8_19

  https://qmro.qmul.ac.uk/xmlui/handle/123456789/98903
• Dong F, Fink A, Li T et al. (2025). Chromatically Equivalent Chordal Graphs journal nameOfConference.

  10.1007/978-3-031-76738-8_17

  https://qmro.qmul.ac.uk/xmlui/handle/123456789/98904
• Fink A, Olarte JA (2025). Extensions of transversal valuated matroids European Journal of Combinatorics nameOfConference.

  10.1016/j.ejc.2025.104153

  https://qmro.qmul.ac.uk/xmlui/handle/123456789/105367
• Elizondo EJ, Fink A, López CG (2025). Matroids and the space of torus-invariant subvarieties of the Grassmannian with given homology class Journal of Pure and Applied Algebra nameOfConference.

  10.1016/j.jpaa.2025.107930

  https://qmro.qmul.ac.uk/xmlui/handle/123456789/105119
• Fink A, Giansiracusa J, Giansiracusa N et al. (2025). Projective hypersurfaces in tropical scheme theory I: the Macaulay ideal Research in the Mathematical Sciences nameOfConference.

  10.1007/s40687-025-00517-7

  https://qmro.qmul.ac.uk/xmlui/handle/123456789/106172
• Fink A, Olarte JA (2025). Extensions of transversal valuated matroids journal nameOfConference.

  10.48550/arxiv.2308.05556

  qmroHref
• Elizondo EJ, Fink A, López CG (2025). Matroids and the space of torus-invariant subvarieties of the Grassmannian with given homology class journal nameOfConference.

  10.48550/arxiv.2112.15334

  qmroHref
• Berget A, Fink A (2024). The external activity complex of a pair of matroids journal nameOfConference.

  doi

  qmroHref