Revisiting the Differential Geometry of Surfaces in 3D-Spaces
摘要
We intend to present some basic facts related to the Differential Geometry of a surface in a 3D-space in the simplest form we imagined. All readers must know basic Calculus and they have to accept from the beginning that we work with functions which are smooth, that is they are indefinitely differentiable functions in one or several variables at each point of their domain of definition.