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Radical Classes need not have a Unique Maximal R0-Closed Subclass
Published online by Cambridge University Press: 20 November 2018
Extract
It was shown in [1] that certain classes of groups which are closed under quotients, and extensions contain a unique maximal inclosed subclass. These results prompted the question whether there exists a class of groups which is closed under quotients and extensions and yet does not have a unique maximal R0-closed subclass. This note provides an example of such a class.
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- Copyright © Canadian Mathematical Society 1974