An alternative moving frame for tubular surfaces around time-like curves in the Minkowski 3-space.
On the geodesics of tubular surfaces in Minkowski 3-space.
On the dual Bishop Darboux rotation axis of the dual space curve.
Non-degenerate quadric surfaces of Weingarten type
We study quadric surfaces in Euclidean 3-space with non-degenerate second fundamental form, and classify them in terms of the Gaussian curvature, the mean curvature, the second Gaussian curvature and the second mean curvature.
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