Β eq deriv S U
MicroHamiltonian.β_eq_deriv_S_U
Plain-language statement
The "definition of temperature from entropy": 1/T = (∂S/∂U), when the derivative is at constant extrinsic d (typically N/V). Here we use β instead of 1/T on the left, and express the right actually as (∂S/∂β)/(∂U/∂β), as all our things are ultimately parameterized by β. This identity requires the denominator ∂U/∂β to be nonzero.
Source project: Physlib
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