t-squares problems, and for computations with the
% matrix inverse and pseudo-inverse.

%% Rule Number One: never multiply by the inverse, inv(A)
%
% Use backslash or a matrix factorization instead (LU, CHOL, or QR).

%% Rule Number Two:  never break Rule Number One
%
% However, the problem with Rule Number One is that it can be hard to
% figure out which matrix factorization to use and how to use it.  Using
% LU, CHOL, or QR is complicated, particularly if you want the best
% performance.  BACKSLASH (MLDIV