Matrix-Diagonal-Sum-Calculator This program receives a square matrix mat and returns the sum of the matrix diagonals, as specified below: The sum includes all the elements on the primary diagonal. The ...

This paper deals with the following generalized inverse eigenvalue problem for generalized seven-diagonal matrix: give three characteristic pairs and a matrix, get a generalized Jacobi matrix (That is ...

Revealing data with intrinsically diagonal block structures is particularly useful for analyzing groups of highly correlated variables. Earlier researches based on non-negative matrix factorization ...

We study several variants of decomposing a symmetric matrix into a sum of a low-rank positive semidefinite matrix and a diagonal matrix. Such decompositions have applications in factor analysis and ...

This paper proposes a novel shrinkage estimator for high-dimensional covariance matrices by extending the Oracle Approximating Shrinkage (OAS) of Chen et al. (2009) to target the diagonal elements of ...