ZHANG, Ruda May 23, 2020:  More on mathematical terms. [db9041d]
ZHANG, Ruda December 05, 2019:  More on manifolds, from John Marshall Lee's textbooks. [6ba9029]
ZHANG, Ruda April 28, 2019:  More on linear operators, algebra. [8629d3e]
ZHANG, Ruda December 31, 2018:  On Unifying Principle of Scientific Theories. [de8674c]
ZHANG, Ruda December 02, 2018:  More on SVD, graph mining, Monte Carlo in econometrics, commercial satellite imagery; text formatting/reflow. [20eea16]
Ruda Zhang May 31, 2017:  Criteria of good scientific research [a64eaf9]
Ruda Zhang May 02, 2017:  Alternative description of game theory [6101191]
Ruda Zhang May 01, 2017:  Symbolic system design [9a1b8d4]