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zbMath0647.53004MaRDI QIDQ3791795

I. R. Porteous

Publication date: 1987

Title: zbMATH Open Web Interface contents unavailable due to conflicting licenses.

zbMATH Keywords

surface umbilics focal surfaces normal congruence

Mathematics Subject Classification ID

Surfaces in Euclidean and related spaces (53A05) Singularities of differentiable mappings in differential topology (57R45)

Related Items (3)

Umbilics and lines of curvature for shape interrogation ⋮ Lipschitzian subspaces in Clifford algebras ⋮ Fast, robust, and faithful methods for detecting crest lines on meshes

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