摘要
We study the singularities of de Sitter Gauss map of timelike hypersurface in Minkowski 4-space through their contact with hyperplanes.
We study the singularities of de Sitter Gauss map of timelike hypersurface in Minkowski 4-space through their contact with hyperplanes.
基金
the National Natural Science Foundation of China (Grant No.10471020)
the New Century Excellent Talents in University of China (Grant No.05-0319)