Mon, 12 Dec 2011 19:26:44 -0800 Scott Morrison minor, work on figures
Mon, 12 Dec 2011 16:32:10 -0800 Kevin Walker added a homeo/pl/smooth etc note early in the intro
Mon, 12 Dec 2011 15:01:37 -0800 Kevin Walker remove lemma 3.2.3 (support-shrink lemma); it was only used once
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