2014: 9th International Colloquium on Graph Theory and Combinatorics, Grenoble, France.
Presented talk: The Adjacency Matrices of Complete and Nutful Graphs
2015: 8th Slovenian Conference on Graph Theory, Kranjska Gora, Slovenia.
Presented talk: Non-Singular Bipartite Graphs With A Singular Deck
2017: The Second Malta Conference in Graph Theory and Combinatorics, Malta.
Presented talk: Edge Construction of Molecular NSSDs
2018: Workshop on Graph Spectra, Combinatorics and Optimization, Aveiro, Portugal.
Presented talk: The Resolvent Energy Matrix of a Graph
2019: 9th Slovenian Conference on Graph Theory, Bled, Slovenia.
Presented talk: Generating Pairs of Generalized Cospectral Graphs from Controllable Graphs
2020: (Invited Speaker) International Conference on Graph Connections (online), Kottayam, Kerala, India.
Presented talk: Molecular Conductivity: Nonsingular Graphs With a Singular Deck
Watch the talk here.
April 2021: (Invited Talk) Spectral Graph Theory Online – research event by Brazilian researchers.
Presented talk: Walks and Eigenvectors
Watch the talk here
June 2021: 8th European Congress of Mathematics – Portorož, Slovenia (online).
Presented talk: The Rank of Pseudo Walk Matrices
March 2023: GCGN2023 – University of Malta (online).
Presented talk: Recovering the Spectrum of a Graph Having Most of its Eigenvalues Shared by a Vertex Deleted Subgraph
Watch the talk here
June 2023: ILAS 2023 – Madrid, Spain.
Presented talk: Recovering the Spectrum of a Graph Having Most of its Eigenvalues Shared by a Vertex Deleted Subgraph – The Polynomial Reconstruction Problem is 50 Years Old
March 2024: (Invited Talk) 05C50 Online – a virtual seminar about graphs and matrices held twice a month by Steve Kirkland and Hermie Monterde from the University of Manitoba, Canada.
Presented talk: On the Adjugate Matrix and the Polynomial Reconstruction Problem
Watch the talk here: password: TG4RFB*=
April 2024: (Invited Talk) An online seminar organized by Milica Anđelić of the University of Kuwait.
Presented talk: Paths, Walks and the Adjugate Matrix
June 2024: Combinatorics 2024, Carovigno, Bari, Italy.
Presented talk: On the Adjugate Matrix and the Polynomial Reconstruction Problem
Alexander Farrugia 