In this paper , a rigidity theorem of hypersurface in real space form will begiven.In addition, we obtain rigidity theorems of submanifold in sphere which improvethe result of Hou and Xu.
Conclusion: The radiation reactions of the mice esophagus seem not to be deteriorated after thoracal irradiation with fast neutron, photon or mixed beams.
And if the computer simulation is correct, not only many hypervelocity stars, but also neutron stars as well as black holes are rushing towards our galaxy from the Large Magellanic Cloud.