球偏差域和拟球

Sphere Distortion Domains and Quasiballs

文章证明了拟球一定是球偏差域并建立了球偏差域的一个充分必要条件．

In this paper,we have studied the sphere distortion domains and the quasiball in space,proved that quasiballs must be sphere distortion domains and extablished a necessary and sufficient condition for sphere distortion domains.