文摘
We use Müller and Nagy’s method of contradicting subsets to give a new proof for the non-existence of sharply 2-transitive subsets of the symplectic groups \(\mathrm {Sp}(2d,2)\) in their doubly-transitive actions of degrees \(2^{2d-1}\pm 2^{d-1}\). The original proof by Grundhöfer and Müller was rather complicated and used some results from modular representation theory, whereas our new proof requires only simple counting arguments.