Bemerkungen über isophengische Flächen und solche Flächen, die bezüglich zweier Beleuchtungen isophotisch sind. (Remarks on isophengic surfaces and surfaces which are isophotic with respect to two light sources)

Publication date: 1989

Published in: Beiträge zur Algebra und Geometrie (Search for Journal in Brave)

Full work available at URL: https://eudml.org/doc/138442

zbMATH Keywords

intensity of light isophengic surfaces isophotic surfaces surfaces of constant brightness

Mathematics Subject Classification ID

Surfaces in Euclidean and related spaces (53A05)

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