Remark on Algorithm 343 [F2]: Eigenvalues and Eigenvectors of a Real Generator Matrix
Herbert Niessner · Communications of the ACM · 1972
We had at our disposal a double precision version (all real variables are declared to be of type double precision) for the IBM 360/50 of the algorithm 343 [1] with logical IF statements converted to arithmetical ones. In the following three modifications which we found to be of practical value are to be discussed.