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math.DG2019
Envelope of intermediate lines of a plane curve
Ady Cambraia, Mostafa Salarinoghabi, Diego Trindade
For a pair of points in a smooth closed convex planar curve , its mid-line is the line containing its mid-point and the intersection point of the corresponding pair of tangent l…
math.DG2019
On Totally umbilical surfaces in the warped product
Ady Cambraia, Abigail Folha, Carlos Peñafiel
In this article we classify the totally umbilical surfaces which are immersed into a wide class of Riemannian manifolds having a structure of warped product, more precisely, we sho…