Lewy's theorem on the zeros of the Hessian of a harmonic function

DOI10.1007/BF00968474zbMath0464.31007MaRDI QIDQ1154013

A. I. Yanushauskas

Publication date: 1981

Published in: Siberian Mathematical Journal (Search for Journal in Brave)

zbMATH Keywords

harmonic functionLewy's theoremzeros of the Hessian

Mathematics Subject Classification ID

Harmonic, subharmonic, superharmonic functions in higher dimensions (31B05)

Cites Work

• On the non-vanishing of the Jacobian of a homeomorphism by harmonic gradients
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