The generalized Birkhoff equations are obtained by using supplementary terms added to the Birkhoff equations. An integral of the Birkhoff equations can be used to the generalized Birkhoff equations. An example is given to illustrate the application of the result.%将 Birkhoff 方程添加一附加项成为广义 Birkhoff 方程.将 Birkhoff 方程的一类积分推广并应用于广义 Birkhoff 方程.举例说明结果的应用.
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