On the PSU(4, 2)-invariant vertex-transitive strongly regular (216, 40, 4, 8) graph

Dean Crnković, Francesco Pavese, Andrea Švob

In 2018 the first, Rukavina and the third author constructed with the aid of a computer the first example of a strongly regular graph $\Gamma$ with parameters (216, 40, 4, 8) and proved…