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Tag Archives: NAG
Update of Catalogue of Software for Matrix Functions
Edvin Hopkins and I have updated to version 3.0 the catalogue of software for matrix functions that we originally produced in 2014 and updated in 2016. It covers what is available in various languages (C++, Fortran, Java, Julia, Python, Rust), … Continue reading
Updated Catalogue of Software for Matrix Functions
Edvin Deadman and I have updated the catalogue of software for matrix functions that we produced in 2014 (and which was discussed in this post). The new version, which has undergone some minor reorganization, is available here. It covers what … Continue reading
Jeff Rohl’s Fortran TV Course
As a first year mathematics undergraduate at the University of Manchester in 1979, I had to choose one course from another department. Like the majority of students, I chose the Fortran Programming course CS151 provided for mathematics students by the … Continue reading
Cataloguing Software for Matrix Functions
I began working on functions of matrices just over thirty years ago, when I was an MSc student, my original interest being in the matrix square root. In those days relatively little research had been done on the topic and … Continue reading
The Nearest Correlation Matrix
A correlation matrix is a symmetric matrix with unit diagonal and nonnegative eigenvalues. In 2000 I was approached by a London fund management company who wanted to find the nearest correlation matrix (NCM) in the Frobenius norm to an almost … Continue reading