Revision history of "Retraction-invariant characteristic subgroup"

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  • (cur | prev) 17:50, 23 October 2009Vipul (talk | contribs). . (1,704 bytes) (+1,704). . (Created page with '{{subgroup property conjunction|retraction-invariant subgroup|characteristic subgroup}} ==Definition== A subgroup of a group is termed a '''retraction-invariant charact…')