https://www.vishalv.com/tags/homeomorphism Personal website of Vishal V, featuring writing, ideas, projects, and research en-us vishalvignesh.iitm@gmail.com (Vishal V) vishalvignesh.iitm@gmail.com (Vishal V) Fri, 24 Jul 2026 00:00:00 GMT https://www.vishalv.com/notes/hatcherAlgebraicTopology2002 https://www.vishalv.com/notes/hatcherAlgebraicTopology2002 Research notes on Algebraic topology. Fri, 24 Jul 2026 00:00:00 GMT vishalvignesh.iitm@gmail.com (Vishal V) algebraic-topologyhomeomorphismdeformation-retractionmapping-cylinderquotient-spacehomotopyhomotopic-mapsretractionidempotenthomotopy-rel-ainclusionhomotopy-equivalencehomotopy-equivalenthomotopy-typecontractiblenullhomotopicgenuscw-complexdimensiontopological-grapheuler-characteristicreal-projective-spacecomplex-projective-spacecharacteristic-mapsubcomplexcw-pairproduct-spacesuspensionjoinsimplexradial-projectionwedge-sumsmash-productisomorphicfundamental-groupreduced-suspensionattachmapping-cone