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zbMath0472.53019MaRDI QIDQ3925481

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Publication date: 1981

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

zbMATH Keywords

second fundamental form line congruence Sannia's fundamental form

Mathematics Subject Classification ID

Differential line geometry (53A25) Local Riemannian geometry (53B20)

Related Items (3)

W--line congruences ⋮ Einige Resultate über die III-Hauptflächen eines Strahlensystems. (Some results about the III-principal surfaces of a rectilinear congruence) ⋮ Über die Mittelfläche einer isotropen Geradenkongruenz

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