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retraction

Published on
July 24, 2026
Algebraic topology
Algebraic-topology homeomorphism deformation-retraction mapping-cylinder quotient-space homotopy homotopic-maps retraction idempotent homotopy-rel-A inclusion homotopy-equivalence homotopy-equivalent homotopy-type contractible nullhomotopic genus CW-complex dimension topological-graph euler-characteristic real-projective-space complex-projective-space characteristic-map subcomplex CW-pair product-space suspension join simplex radial-projection wedge-sum smash-product isomorphic fundamental-group reduced-suspension attach mapping-cone
Research notes on Algebraic topology.
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Vishal V

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