Jz. Zhou, SUFFICIENT CONDITIONS FOR ONE DOMAIN TO CONTAIN ANOTHER IN A SPACE OFCONSTANT CURVATURE, Proceedings of the American Mathematical Society, 126(9), 1998, pp. 2797-2803
As an application of the analogue of C-S. Chen's kinematic formula in
the 3-dimensional space of constant curvature epsilon, that is, Euclid
ean space R-3, 3-sphere S-3, hyperbolic space H-3 (epsilon = 0, +1, -1
, respectively), we obtain sufficient conditions for one domain to con
tain another domain in either an Euclidean space R-3, or a 3-sphere S-
3 or a hyperbolic space H-3.