Whitehead, J. H. C. An expression of Hopf’s invariant as an integral. (English) Zbl 0030.07902 Proc. Natl. Acad. Sci. USA 33, 117-123 (1947). Page: −5 −4 −3 −2 −1 ±0 +1 +2 +3 +4 +5 Show Scanned Page Cited in 2 ReviewsCited in 28 Documents Keywords:Metric geometry, convex geometry, integral geometry PDFBibTeX XMLCite \textit{J. H. C. Whitehead}, Proc. Natl. Acad. Sci. USA 33, 117--123 (1947; Zbl 0030.07902) Full Text: DOI