报告人:Richard Moeckel（美国明尼苏达大学)

时  间:2019年2月27日  14:00--15:00

地  点:理科楼 LA106

摘  要: Consider a collection of n rigid, massive bodies interacting according to their mutual gravitational attraction.  A relative equilibrium motion is one where the entire configuration rotates rigidly and uniformly about a fixed axis — all of the bodies are phase locked.   Such a motion is possible only for special positions and orientations of the bodies.   A minimal energy motion is one which has the minimum possible energy in its fixed angular momentum level.  While every minimal energy motion is a relative equilibrium motion, the main result here is that a relative equilibrium motion of n >= 3 disjoint rigid bodies is never an energy minimizer.  Since energy minimizers are the expected final states produced by tidal interactions, phase locking of 3 or more bodies will not occur.

报告人简介:Richard Moeckel，美国明尼苏达大学数学系教授，国际知名多体问题专家，详见其个人主页

http://www-users.math.umn.edu/~rmoeckel/indexr.html

学院联系人:王智强

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