Error: 'y.de Nethehomotopycategory(hotop)by:objhotop=topologicalspaceshotop(x;y)=[x;y](pointedhomotopyclassesofpointedmapsfromxtoy)examplesofhomotopyequivalences:1.anyhomeomorphism2.rn'ptproof::letf:pt!rnbyp - PowerPoint Presentations and PDF Documents