Madanha, Sesuai Yash
(2013)
*On Groups which are Products of Weakly Totally Permutable Subgroups.*
UNSPECIFIED thesis, UNSPECIFIED.

## Abstract

This work is a contribution to the theory of products of ï¬nite groups. A group G = AB is a weakly totally permutable product of subgroups A and B if every subgroup, U of A such that U â‰¤ A âˆ© B or A âˆ© B â‰¤ U, permutes with every subgroup of B and if every subgroup V of B such that V â‰¤ A âˆ© B or A âˆ© B â‰¤ V , permutes with every subgroup of A. It follows that a totally permutable product is a weakly totally permutable product. Some results on totally permutable products in the framework of formation theory are generalised. In particular it is shown that if the factors of a weakly totally permutable product are in F, then the product is also in F, where F is a formation containing U, the class of all ï¬nite supersoluble groups. It is also shown that the F-residual (and F-projector) of the product G is just the product of the F-residuals (and respectively F-projectors) of the factors A and B, when F is a saturated formation containing U. Moreover, it is shown that a weakly totally permutable product is an SC-group if and only if its factors are SC-groups. In the framework of Fitting classes some results are extended to weakly totally permutable products. Fischer classes containing U were proved to behave nicely with respect to forming products in totally permutable products. It is shown that a particular Fischer class, F N, where F is a Fitting class containing U and N is the class of all nilpotent groups, also behave nicely with respect to forming products in weakly totally permutable products.

Item Type: | Thesis (UNSPECIFIED) |
---|---|

Uncontrolled Keywords: | finite groups,permutable products,formation theory |

Divisions: | Universities > State Universities > University of Zimbabwe |

Depositing User: | Mr. Edmore Sibanda |

Date Deposited: | 07 Dec 2015 01:31 |

Last Modified: | 07 Dec 2015 01:31 |

URI: | http://researchdatabase.ac.zw/id/eprint/1604 |

### Actions (login required)

View Item |