Lewy, Hans On the non-vanishing of the Jacobian of a homeomorphism by harmonic gradients. (English) Zbl 0164.13803 Ann. Math. (2) 88, 518-529 (1968). Page: −5 −4 −3 −2 −1 ±0 +1 +2 +3 +4 +5 Show Scanned Page Cited in 2 ReviewsCited in 13 Documents MSC: 35-XX Partial differential equations Keywords:partial differential equations PDF BibTeX XML Cite \textit{H. Lewy}, Ann. Math. (2) 88, 518--529 (1968; Zbl 0164.13803) Full Text: DOI