ZHANG, Ruda May 02, 2020:  More on numerical analysis: Newton method; quasi-Newton methods; optimization; reference books. [67cbfe5]
ZHANG, Ruda August 08, 2019:  Formating; separate duality theorems; add Vehicle Routing Problem [fbfb8ee]
ZHANG, Ruda December 30, 2018:  Use dollar style math markup. [1b7036c]
Ruda Zhang March 21, 2017:  Modify notes on thermodynamics. [d00be99]
Ruda Zhang March 21, 2017:  Add notes. [1393ff8]
Ruda Zhang March 21, 2017:  Add quasi-newton methods [951ceba]