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When is the homotopy set [X, Y] infinite?. - Periodic knots and desuspensions of free involutions on spheres. - The Tits conjecture and the five string braid group. - Subgroup presentations without coset representatives.
When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.