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The purpose of this paper is to study the time-integral theorems for a generalized Birkhoff system. A time-integral identity of the system is presented. A power-like equation,a Virial-like theorem,an integral variational principle and a differential variational principle for the system are deduced by using the time-integral identity.
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Keywords:
- generalized Birkhoff system/
- time-integral theorem/
- power-like equation/
- variational principle
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