Positive definite matrices play a central role in mathematics, physics, statistics and engineering due to their unique properties and widespread applicability. These matrices, which are characterised ...

Center for Research and Development in Mathematics and Applications, Department of Mathematics, University of Aveiro, Aveiro, Portugal. Department of Mathematics, Faculty of Science and Technology, ...

first I want to thank you for your great work and your very good explanations series in YT. I encounter a problem when trying to estimate a adjacency matrix from synthetic timeseries data that have ...

Abstract: This report presents a procedure for simultaneously inverting a number of posi tive-definite matr ices on the Massively Parallel Processor (MPP) by assigning each matrix to a separate square ...

ABSTRACT: We derive necessary and sufficient conditions for the existence of a Hermitian nonnegative-definite solution to the matrix equation AXB = C. Moreover, we derive a representation of a general ...

I find when I use large basis to perform some accuracy tests. However, sometimes I find the calculation stucks at the beginning of SCF procedure, this makes me quite confused. Later when I switch ...