Third Annotation and Thesis Statement

 Differential Geometry

before that we only can measure normal things, but chern that he start to define Differential Geometry. if you know it that i think you can measure whatever you want, it no just use the length, wight and high.

accord:

http://en.wikipedia.org/wiki/Differential_geometry

Differential geometry is a mathematical discipline that uses the methods of differential and integral calculus to study problems in geometry. The theory of plane and space curves and of surfaces in the three-dimensional Euclidean space formed the basis for its initial development in the eighteenth and nineteenth century.

Thesis Statement

 chern is one of the leaders in differential geometry of the twentieth century. he use his math to define a lot theory that we don't know. he is a chinese but why he be famous because the string theory.Chern's work spreads over all the classic fields of differential geometry. It includes areas currently fashionable, perennial , the foundational, and some areas such as projective differential geometry and webs that have a lower profile. He published results in integral geometry, value distribution theory of holomorphic functions, and minimal submanifolds.