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 ...

"The Society for Industrial and Applied Mathematics is a leading international association for applied mathematics, and its publications could be the nucleus of an adequate collection in mathematics.

A simple explicit formula is provided for the matrix of second derivatives of the observed data log-likelihood in terms of derivatives of the criterion function (the conditional expectation of the ...