On the semiproportional character conjecture in groups Sp4(q)

Abstract

Previously, the author made the following conjecture: if a finite group has two semiproportional irreducible characters φ and ψ, then φ(1) = ψ(1). In the present paper, a new confirmation of the conjecture is obtained. Namely, the conjecture is verified for symplectic groups Sp4(q) and PSp4(q). © 2013 Pleiades Publishing, Ltd.