Fri, 06 May 2011 16:04:22 -0700 remark about apparent vacuity of lemma 6.1.2 (spheres)
Kevin Walker <kevin@canyon23.net> [Fri, 06 May 2011 16:04:22 -0700] rev 755
remark about apparent vacuity of lemma 6.1.2 (spheres)
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