پایای بئر و گروههای کامل و توانای تعمیم یافته

the thesis has been arranged into five chapters and mainly concerned with the baer-invariant of groups which is the generalization of the schur-multiplier with respect to the variety of groups. chapter one is devoted to collect some notation and background information which are needed in the next chapters. its also contains some important statements which will be generalized in this thesis. chapter two deals with the varietal perfect groups, the generalization of the perfect groups to an arbitrary variety of groups. chapter three contains the generalization of capable groups and some results which will be obtained in this direction. chapter four is devoted to the calculation of the baer-invariants of some groups. chapter five is concerned with the subgroup theorems.