关于减小体积的射影映射  

出　　处：《Chinese Quarterly Journal of Mathematics》1995年第2期40-44,共5页数学季刊（英文版）

摘　　要：Given a projective map F:M→N of a complete Riemannian manifold to a Riemannian manifold with the sectional curvature bounded above by a negative constant,we prove that f decreases volume up to a constant depending only on the curvatures of M and N.This generalizes the result due to Har'el.

关 键 词：减小体积 射影映射 

分 类 号：O186.13[理学—数学]