Combinatorics (finite and discrete mathematics)

R. Craigen studies orthogonal matrices and related objects in the field of Combinatorial Matrix Theory. K. Gunderson works in random graphs, percolation and extremal combinatorics. S. Kirkland works in matrix theory and graph theory, with particular interest in the theory and applications of nonnegative matrices, combinatorial matrix theory, and spectral graph theory. A. Prymak is interested in questions related to strongly regular graphs and their Euclidean representations.