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Aug 25, 2014 at 16:38 comment added darij grinberg My problem with useless conditions is that I keep searching for the place where they are used in the proof, which tends to confuse me if they are not. But this proof is so clear that it doesn't really matter.
Aug 25, 2014 at 14:56 comment added Gregory J. Puleo @darijgrinberg: Thanks for your comments! Point taken regarding (1). As far as Lemma 2.1 goes, nothing is really gained by allowing S to be empty or to be all of V(G) (this only yields f_1(G) <= f_1(G) ). It seems a hair simpler to just keep the same hypothesis as Corollary 2.2, where the condition really is needed.
Aug 25, 2014 at 9:08 vote accept darij grinberg
Aug 25, 2014 at 9:07 comment added darij grinberg Very nice argument! (Just in case you are still going to edit the paper: I don't see why you require "nonempty proper" as early as in Lemma 2.1, and I wouldn't refer to (1) as "equation".)
Aug 25, 2014 at 5:47 comment added Gerry Myerson This is definitely not a violation of etiquette.
Aug 25, 2014 at 1:19 review First posts
Aug 25, 2014 at 1:38
Aug 25, 2014 at 1:16 history answered Gregory J. Puleo CC BY-SA 3.0