Boltzmann H theorem
Boltzmann H theorem[′bōlts·mən ′āch ‚thir·əm]
The theorem that the entropy of a system never decreases; Boltzmann proved this for a classical gas of colliding particles. Also known as H theorem of Boltzmann.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.