Bootstrap Shuffling reality to produce your data 2014-11-26 – 2020-10-16
Bias reduction Estimating the bias of an estimator so as to subtract it off again 2020-02-26
Sparse coding How to make big things out of lists of small things. 2014-11-17 – 2019-11-05
Inner product spaces The most highly developed theory of squaring things 2019-01-01 – 2019-02-11