Homology, Homotopy and Applications

Cofibrations in the category of Frölicher spaces: Part I

Brett Dugmore and Patrice Pungu Ntumba

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Cofibrations are defined in the category of Frölicher spaces by weakening the analog of the classical definition to enable smooth homotopy extensions to be more easily constructed, using flattened unit intervals. We later relate smooth cofibrations to smooth neighborhood deformation retracts. The notion of smooth neighborhood deformation retract gives rise to an analogous result that a closed Frölicher subspace A of the Frölicher space $X$ is a smooth neighborhood deformation retract of $X$ if and only if the inclusion $i : A \hookrightarrow X$ comes from a certain subclass of cofibrations. As an application we construct the right Puppe sequence.

Article information

Homology Homotopy Appl., Volume 9, Number 2 (2007), 413-444.

First available in Project Euclid: 23 January 2008

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Mathematical Reviews number (MathSciNet)

Zentralblatt MATH identifier

Primary: 55P05: Homotopy extension properties, cofibrations

Frölicher space flattened unit interval smooth neighborhood deformation retract smooth cofibration cofibration with FCIP Puppe sequence


Dugmore, Brett; Ntumba, Patrice Pungu. Cofibrations in the category of Frölicher spaces: Part I. Homology Homotopy Appl. 9 (2007), no. 2, 413--444. https://projecteuclid.org/euclid.hha/1201127344

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