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GENERALISED MUTUALLY PERMUTABLE PRODUCTS AND SATURATED FORMATIONS, II
- Part of
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- Journal:
- Bulletin of the Australian Mathematical Society / Volume 110 / Issue 2 / October 2024
- Published online by Cambridge University Press:
- 30 January 2024, pp. 313-323
- Print publication:
- October 2024
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- Article
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A group
$G=AB$ is the weakly mutually permutable product of the subgroups A and B, if A permutes with every subgroup of B containing 
$A \cap B$ and B permutes with every subgroup of A containing 
$A \cap B$. Weakly mutually permutable products were introduced by the first, second and fourth authors [‘Generalised mutually permutable products and saturated formations’, J. Algebra 595 (2022), 434–443] who showed that if 
$G'$ is nilpotent, A permutes with every Sylow subgroup of B and B permutes with every Sylow subgroup of A, then 
$G^{\mathfrak {F}}=A^{\mathfrak {F}}B^{\mathfrak {F}} $, where 
$ \mathfrak {F} $ is a saturated formation containing 
$ \mathfrak {U} $, the class of supersoluble groups. In this article we prove results on weakly mutually permutable products concerning 
$ \mathfrak {F} $-residuals, 
$ \mathfrak {F} $-projectors and 
$\mathfrak {F}$-normalisers. As an application of some of our arguments, we unify some results on weakly mutually 
$sn$-products.
