One of the fundamental operations in machine learning is computing the inverse of a square matrix. But not all matrices have an inverse. The most common way to check if a matrix has an inverse or not ...

A well-known problem in numerical ecology is how to recombine presence-absence matrices without altering row and column totals. A few solutions have been proposed, but all of them present some issues ...

Dimension reduction in a regression analysis of response y given a p-dimensional vector of predictors x reduces the dimension of x by replacing it with a lower-dimensional linear combination f'x of ...