Some recent publications
Signless Laplacian Estrada index and Laplacian Estrada index of uniform hypergraphs (with C. Duan and L. Wang), Math arXiv:2206.00109.
Pseudo-geometric strongly regular graphs with a regular point (with K. Guo), Math arXiv:2204.04755.
On bipartite distance-regular Cayley graphs with small diameter (with M. Jazaeri), Electronic Journal of Combinatorics 29 (2022), P2.12. Math arXiv:2109.13849.
Unit gain graphs with two distinct eigenvalues and systems of lines in complex space (with P. Wissing), Discrete Math. 345 (2022), 112827. Math arXiv:2105.09149.
Spectral fundamentals and characterizations of signed directed graphs (with P. Wissing), J. Combinatorial Th. A. 187 (2022), 105573 . Math arXiv:2009.12181.
Trees with a large Laplacian eigenvalue multiplicity (with S. Akbari and M.H. Fakharan), Linear Algebra and its Applications 586 (2020), 262-273. Math arXiv:1907.11482.
The negative tetrahedron and the first infinite family of connected digraphs that are strongly determined by the Hermitian spectrum (with P. Wissing), J. Combinatorial Th. A 173 (2020), 105232. Math arXiv:1903.09531.
Partially metric association schemes with a multiplicity three (with J.H. Koolen and J. Park), J. Combinatorial Th. B 130 (2018), 19-48. Math arXiv:1701.03193.
Semidefinite programming and eigenvalue bounds for the graph partition problem (with R. Sotirov), Math. Programming B 151 (2015), 379-404. Math arXiv:1312.0332.
Editor-in-Chief of the Electronic Journal of Combinatorics
E-JC is a very high-standard diamond open access journal (free to read, free to publish)
Program director M.Sc. Quantitative Finance and Actuarial Science
Some coauthors: Willem Haemers (11), Jack Koolen (11), Miquel Àngel Fiol (6), Dick den Hertog (6), Ted Spence (5), Cristina Dalfó (3), Reza Omidi (3), Renata Sotirov (3), Sebi Cioabă (2), Misha Muzychuk (2) Hein Fleuren (1), Bill Martin (1), Hajime Tanaka (1)
My coauthors are from: Belgium, Bosnia and Herzegovina, Canada, Catalonia, China, Croatia, Iran, Israel, Japan, Korea, the Netherlands, Romania, Russia, Scotland, United States.
The Erdös number project (mine is 2)
Space-filling designs (back in the air)
Research fellow (2001-2006) of the Royal Netherlands Academy of Arts and Sciences (KNAW)
Workshop on Algebraic Combinatorics, June 17-18, 2015, Tilburg