ZHANG, Ruda December 22, 2022:  More edits on RKHS. Properties of MACG. Minor edits before migrating to Gollum v5.0 [430122d]
ZHANG, Ruda March 09, 2021:  Defind mode, median; more on Gaussian rv, probabilistic models on matrix manifolds. [7c5a23c]
ZHANG, Ruda December 30, 2018:  Use dollar style math markup. [1b7036c]
ZHANG, Ruda July 13, 2018:  Initiate diffusion maps; more on PCA [b4c5da7]
ZHANG, Ruda March 23, 2018:  Global remove trailing whitespaces [2b7ff90]
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]