ZHANG, Ruda December 05, 2019:  More on manifolds, from John Marshall Lee's textbooks. [6ba9029]
ZHANG, Ruda December 30, 2018:  Use dollar style math markup. [1b7036c]
ZHANG, Ruda September 30, 2018:  CSS redesign; more edits. [dd44d96]
ZHANG, Ruda March 23, 2018:  Global remove trailing whitespaces [2b7ff90]
Ruda Zhang April 26, 2017:  Correct naming of Legendre transformation [194f436]
Ruda Zhang April 15, 2017:  Modify notes on thermodynamics [237a2dc]
Ruda Zhang March 28, 2017:  Comment on the main use of dynamics, thermodynamics, and chemical thermodynamics. [3bc8f40]
Ruda Zhang March 27, 2017:  Modify Chemical Equilibrium [61e92e0]
Ruda Zhang March 24, 2017:  Move Gibbs-Duhem relation to Chemical Equilibrium [29492e3]
Ruda Zhang March 23, 2017:  Modify notes on chemical equilibrium [7a7f5d3]
Ruda Zhang June 26, 2016:  add category tag to wiki pages [a9b356c]
Ruda Zhang June 26, 2016:  use canonical filename and no internal H1 [eeca8ff]