Abstract
In this note we prove a pullback theorem for cofibrations, which extends a well known theorem of Strøm [5]. It also implies the pullback theorem of Heath [4] for locally equiconnected spaces. In addition, we comment on the dual problem of attaching fibrations.
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Kieboom, R.W. A pullback theorem for cofibrations. Manuscripta Math 58, 381–384 (1987). https://doi.org/10.1007/BF01165895
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DOI: https://doi.org/10.1007/BF01165895