论文信息 - Relations between a manifold and its focal set - 字舞流文

Relations between a manifold and its focal set

S. A. Robertson | S. Carter

[1] H. Hopf,et al. Felder von Flächenelementen in 4-dimensionalen Mannigfaltigkeiten , 1958 .

[2] P. Olum. MAPPINGS OF MANIFOLDS AND THE NOTION OF DEGREE , 1953 .

[3] S. Sternberg,et al. Lectures on Differential Geometry , 1966, The Mathematical Gazette.