Borsuk, Karol Concerning the set of retractions. (English) Zbl 0149.40702 Colloq. Math. 18, 197-201 (1967). Page: −5 −4 −3 −2 −1 ±0 +1 +2 +3 +4 +5 Show Scanned Page Cited in 4 Documents MSC: 54C15 Retraction Keywords:topology PDFBibTeX XMLCite \textit{K. Borsuk}, Colloq. Math. 18, 197--201 (1967; Zbl 0149.40702) Full Text: DOI