Research students

Information for students

Useful references. See the group discord for the group meeting schedule. Old group meeting schedule.

PhD students

1. Gabbie Bourla
2. Ian George
3. Josephine Reynes (co-supervised with Logan Crew), Extensions of the Tutte Polynomial and Results on the Interlace Polynomial, completed spring 2025
4. Aristotelis Chaniotis (co-supervised with Sophie Spirkl), Preserving and Generalizing χ-boundedness, completed fall 2025
5. Nick Olson-Harris, Some Applications of Combinatorial Hopf Algebras to Integro-Differential Equations and Symmetric Function Identities, completed spring 2024
6. Lukas Nabergall, Enumerative perspectives on chord diagrams, completed fall 2022, UWaterloo.
7. Ali Mahmoud (co-supervised with Achim Kempf), On the Enumerative Structures in Quantum Field Theory, completed spring 2020, UWaterloo.
8. JT Davies returned to the US
9. Iain Crump, Graph Invariants with Connections to the Feynman Period in φ⁴ Theory., completed spring 2017, SFU.
10. Nicolas Marie, On Laplace–Borel Resummation of Dyson–Schwinger Equations, completed fall 2014 SFU.

Masters students

1. Matteus Froese (co-supervised with Michael Borinsky)
2. Rajbir Longia
3. Kimia Shaban, Combinatorial aspects of Feynman integrals and causal set theory, completed spring 2025, UWaterloo.
4. Amelia Cantwell, Tubings of rooted trees, completed spring 2024, UWaterloo.
5. Hector Li, Cointeractions of some word bialgebras, completed fall 2021, UWaterloo.
6. Steven Santoli, Minimum number of triangles of K₅ descendants, completed winter 2022, UWaterloo.
7. Morgan Ge withdrew.
8. Simone Hu, A combinatorial tale of two scattering amplitudes: see two bijections, completed fall 2021, UWaterloo.
9. Sam Yusim, Aspects of Quantum Field Theory in Enumerative Graph Theory, completed Fall 2022, UWaterloo.
10. William Dugan, Sequences of Trees and Higher-Order Renormalization Group Equations, completed summer 2019, UWaterloo.
11. Mohamed Laradji, Double Triangle Descendants of K₅, completed fall 2017, SFU.
12. Ben Moore, Rooted Graph Minors and Reducibility of Graph Polynomials, completed spring 2017, SFU.
13. Brad Jones, On tree hook length formulae, Feynman rules and B-series, completed fall 2014, SFU.
14. Yue Zhao, Combinatorial Hopf algebras on generating trees and certain generating graphs, completed summer 2014, SFU.
15. Iain Crump, Forbidden minors for 3-connected graphs with no non-splitting 5-configurations, completed summer 2012, SFU.

Research undergrads

1. Kai Choi, summer 2025, UWaterloo.
2. Stephanie Penner, summer 2025, (cosupervised with Steve Melczer), UWaterloo
3. Rajbir Longia, PHYS 437A Fall 2024, PHYS 437B Winter 2025, UWaterloo
4. Ervin Wang, Winter 2024, (cosupervised with postdoc Paul Balduf), UWaterloo
5. Jette Gutzeit, Winter/Spring 2024, visiting from Germany
6. Will Dallaway, PHYS 437A Fall 2021, PHYS 437B Winter 2022, UWaterloo
7. Maehak Ramlogan, summer 2021, UWaterloo
8. Maria Esipova, summer 2021, UWaterloo
9. Shannon Jeffries, winter 2021, UWaterloo
10. Jordan Long, summer 2020, UWaterloo
11. Mushegh Shahinyan, in my group under postdoc Marcel Golz, summer 2020, UWaterloo
12. Xinle (Clair) Dai, summer 2019, UWaterloo
13. Simone Hu, summer 2018 UWaterloo
14. Jim Shaw, summer 2018 UWaterloo
15. Matthew Lynn, summer 2016 SFU
16. Wes Chorney, summer 2016 SFU
17. Max Neyra-Nesterenko, summer 2016 SFU
18. Gregory Maxedon, summer 2015 SFU, poster.
19. Brad Jones, summer 2012 SFU
20. Yue Zhao (co-supservised with Jason Bell), summer 2011 SFU
21. Aleks Vlasev, summer 2010 SFU
22. Konrad Duch, summer 2010