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RESEARCH PRODUCT

Fitting classes and lattice formations I

M. Arroyo-jordáMaría Dolores Pérez-ramos

subject

Discrete mathematicsMathematics::Group TheoryClass (set theory)Pure mathematicsGeneral MathematicsClosure (topology)Lattice (group)Fitting subgroupMathematics

description

AbstractA lattice formation is a class of groups whose elements are the direct product of Hall subgroups corresponding to pairwise disjoint sets of primes. In this paper Fitting classes with stronger closure properties involving F-subnormal subgroups, for a lattice formation F of full characteristic, are studied. For a subgroup-closed saturated formation G, a characterisation of the G-projectors of finite soluble groups is also obtained. It is inspired by the characterisation of the Carter subgroups as the N-projectors, N being the class of nilpotent groups.

https://doi.org/10.1017/s1446788700008727