ZHANG, Ruda December 30, 2018:  Use dollar style math markup. [1b7036c]
ZHANG, Ruda March 23, 2018:  Global remove trailing whitespaces [2b7ff90]
ZHANG, Ruda March 23, 2018:  More on WADGPS, map elements; topology/manifold, math branches, Taleb on probability [46880f6]
Ruda Zhang April 26, 2017:  Correct naming of Legendre transformation [194f436]
Ruda Zhang April 15, 2017:  Modify notes on thermodynamics [237a2dc]
Ruda Zhang April 15, 2017:  Add Lagrange's equation as full differentiation [dc97671]
Ruda Zhang June 26, 2016:  Entry page overhaul. [d0c7379]
Ruda Zhang June 26, 2016:  one sentence per line [e15360a]
Ruda Zhang June 26, 2016:  add category tag to wiki pages [a9b356c]
Ruda Zhang June 26, 2016:  fix pdf link path and use external link style [570ec4f]
Ruda Zhang June 26, 2016:  use canonical filename and no internal H1 [eeca8ff]