报告摘要： The law of conservation of energy is considered the bedrock
law of nature. In this talk we will show that in a curved spacetime, the
total energy-momentum of a dynamic system can not be defined. Therefore
the law of conservation of energy-momentum does not make any sense.
Gravitational field does not carry energy-momentum. Gravity is not a
force like electro-magnetic, strong, and weak interactions.

报告人简介：吴兆颜，吉林大学理论物理中心教授，博导，长期从事量子绝热定
理、Berry 位相，数学物理的研究。近年来主要研究广义相对论和引力理论中的相
关问题。