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On generalizations of Borsuk’s homotopy extension theorem. (English) Zbl 0304.55009


MSC:

55P05 Homotopy extension properties, cofibrations in algebraic topology
54C45 \(C\)- and \(C^*\)-embedding
54C55 Absolute neighborhood extensor, absolute extensor, absolute neighborhood retract (ANR), absolute retract spaces (general properties)
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