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Generating function (physics) : ウィキペディア英語版
Generating function (physics)
Generating functions which arise in Hamiltonian mechanics are quite different from generating functions in mathematics. In physics, a generating function is, loosely, a function whose partial derivatives generate the differential equations that determine a system's dynamics. Common examples are the partition function of statistical mechanics, the Hamiltonian, and the function which acts as a bridge between two sets of canonical variables when performing a canonical transformation.
==In Canonical Transformations==
There are four basic generating functions, summarized by the following table:
\,\! and P = - \frac \,\!
|-
|F= F_2(q, P, t) = F_1 - QP \,\!
|p = ~~\frac \,\! and Q = ~~\frac \,\!
|-
|F= F_3(p, Q, t) =F_1 + qp \,\!
|q = - \frac \,\! and P = - \frac \,\!
|-
|F= F_4(p, P, t) =F_1 + qp - QP \,\!
|q = - \frac \,\! and Q = ~~\frac \,\!
|}

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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