Lagrange, in the memoir of 1810, and the second edition of the ‘Mécanique Analytique,’ remarks, that for a particular system of arbitrary constants, viz., if $\alpha,...$ denote the initial values of the coordinates $\xi,..$ and $\lambda,..$ denote the initial values of $\smash[b]{\frac{dT}{d\xi'}},...$ then the equations for the ...

The external coordinates of all the systems in the ensemble are supposed, as heretofore, to have the same value, and when they vary, to vary together. For distinction, we may call such an ensemble a grand ensemble, and one in which the systems differ only in phase a petit ensemble.

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Stack Exchange network consists of 183 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.

Stack Exchange Network. Stack Exchange network consists of 183 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.

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Stack Exchange Network. Stack Exchange network consists of 183 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.

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