Finite groups of global breadth four in the sense of Frobenius.

LetGbe a finite group andea positive integer dividing |G|, the order ofG. The size of the setwas studied originally by G. Frobenius, in order to find restrictions on the structure ofG. Heineken and Russo [4] introducedas global breadth in the sense of Frobenius. In this paper, we investigate the groupsGwithB(G) = 4. [ABSTRACT FROM PUBLISHER]