Ruled surfaces with two guides (Catalan surfaces)

Lecture

Definition 2.1.

The surface of Catalan is a ruled surface whose rectilinear generators are parallel to the same plane.

Definition 2.2.

The plane by which the generatrix surfaces of Catalan are parallel is called the plane of parallelism.

Definition 2.3.

The surface of Catalan, all of whose generators intersect one straight line, is called the Conoid

Ruled surfaces with two guides (Catalan surfaces)

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