ZHANG, Ruda April 24, 2019:  Try <object> tag for SVG rendering [13bdcb7]
ZHANG, Ruda December 30, 2018:  Use dollar style math markup. [1b7036c]
ZHANG, Ruda July 10, 2018:  Add manifold learning [ba3d5e6]
Ruda Zhang October 23, 2016:  Web mapping commerical player. [8c04d15]
Ruda Zhang October 18, 2016:  Definition of Mercator [c2b5e0b]