Re:A New Physics Theory of Life (2014)
by ClayFerguson on Tuesday December 06, 2016 @02:23PM
(#13117476)
Yes I left out the part about steady state condition as well as absolute zero temperature condition, because those are boundary conditions (constant conditions) that don't involve time. My point is about an integral over all time.
And yes the definition of "universe" is something I define as "a closed system that doesn't interact with other systems", which is also a consistent definition even if the multiverse theory is correct. If two things interact then they are by definition in the same universe.
You left out a bit. If we take Wikipedia's definition (I know, I know):
> The second law of thermodynamics states that the total entropy of an isolated system always increases over time, or remains constant in ideal cases where the system is in a steady state or undergoing a reversible process.
As far as is currently known the laws of physics are time-reversible, which (ISTM, at least) would imply that the latter clause could very easily apply to the universe as a whole.
(There's also the issue of whether the universe itself is a closed system.)