Abstract
The sum and difference maps for a circle. The definitions of joins, cones and suspensions. The difference construction \(\delta (f, g)\) for two null-homotopies f, g of a map. The chain complex version: the chain homotopy difference construction for chain maps.
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Crabb, M., Ranicki, A. (2017). The Difference Construction. In: The Geometric Hopf Invariant and Surgery Theory. Springer Monographs in Mathematics. Springer, Cham. https://doi.org/10.1007/978-3-319-71306-9_1
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DOI: https://doi.org/10.1007/978-3-319-71306-9_1
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Publisher Name: Springer, Cham
Print ISBN: 978-3-319-71305-2
Online ISBN: 978-3-319-71306-9
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