Editing H-theorem
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Boltzmann's '''H-theorem''' states that the [[entropy]] of a closed system can only increase in the course of time, and must | Boltzmann's '''H-theorem''' states that the [[entropy]] of a closed system can only increase in the course of time, and must | ||
approach a limit as time tends to infinity. | approach a limit as time tends to infinity. | ||
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:<math>\sigma = -k \sum_{i,j} \int C(f_i,f_j) \ln f_i d {\mathbf u}_i</math> | :<math>\sigma = -k \sum_{i,j} \int C(f_i,f_j) \ln f_i d {\mathbf u}_i</math> | ||
At equilibrium, <math>\sigma = 0</math>. | At equilibrium, <math>\sigma = 0</math>. | ||
==See also== | ==See also== | ||
*[[Boltzmann equation]] | *[[Boltzmann equation]] | ||
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# L. Boltzmann "", Wiener Ber. '''63''' pp. 275- (1872) | # L. Boltzmann "", Wiener Ber. '''63''' pp. 275- (1872) | ||
#[http://store.doverpublications.com/0486647412.html Sybren R. De Groot and Peter Mazur "Non-Equilibrium Thermodynamics", Dover Publications] | #[http://store.doverpublications.com/0486647412.html Sybren R. De Groot and Peter Mazur "Non-Equilibrium Thermodynamics", Dover Publications] | ||
[[category: non-equilibrium thermodynamics]] | [[category: non-equilibrium thermodynamics]] |