Talk:Equivalence of Definitions of Normal Subset/3 and 4 imply 2

As the concept of a "normal subset" is more general than that of a "normal subgroup", the recommendation is that the equivalence proofs for normal subset supersede those for normal subgroup, rather than have it the other way round. Therefore this page (and the equivalent ones) should not be deleted. --prime mover (talk) 20:38, 19 January 2014 (UTC)