Based on the statement that the interval deformation energy relates only on the displacements at two ends, the Lagrange bracket and Poisson bracket can be derived from pure mathematical analysis.

 
  • 根據區段變形能只與其兩端位移有關(guān),就可通過(guò)數學(xué)分析得到Lagrange括號與Poisson括號等內容。
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