||Normal developable surfaces of surfaces along curves
Hananoi, SatoshiIzumiya, Shyuichi
Proceedings of the royal society of edinburgh section a-mathematics
203 , 2017-02 , Cambridge University Press
We consider a developable surface normal to a surface along a curve on the surface. We call it a normal developable surface along the curve on the surface. We investigate the uniqueness and the singularities of such developable surfaces. We discover two new invariants of curves on a surface that characterize these singularities.