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Date: 2011-06-13 08:06:45 Differential topology H-cobordism Homotopy sphere Kervaire invariant Piecewise linear manifold Differential structure 4-manifold Cobordism Mark Mahowald Topology Surgery theory Geometric topology		Add to Reading List Source URL: www.ams.org Download Document from Source Website File Size: 293,44 KB Share Document on Facebook

	COHOMOTOPY SETS OF 4-MANIFOLDS ROBION KIRBY, PAUL MELVIN AND PETER TEICHNER Abstract. Elementary geometric arguments are used to compute the group of homotopy classes of maps from a 4-manifold X to the 3-sphere, and to e DocID: 1qWX7 - View Document
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	How much does it cost to evert the sphere? Tristan Rivière (ETH Zürich) How much does it cost...to knot a closed simple curve ? To cover the sphere twice ? to realize such or such homotopy class ? ...etc. All these que DocID: 1nnRs - View Document