f08 least squares and eigenvalue problems lapack f08wtc naglibrary function document nag zgghd3 f08wtc 1 purpose nag zgghd3 f08wtc reduces a pair of complex matrices a b whereb is upper ...
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...F least squares and eigenvalue problems lapack fwtc naglibrary function document nag zgghd purpose reduces a pair of complex matrices b whereb is upper triangular to the generalized hessenberg form using unitary transformations specication include void ordertype order computeqtype compq computeztype compz integer n ilo ihi pda pdb q pdq z pdz nagerror fail description usually third step in solution problem ax bx optional rst balances two zggbal fwvc second matrix reduced qr factorization zgeqrf fasc this transformation isappliedtomatrixa by calling zunmqr fauc driver zggev fwqc solves combining all required steps including those just listed sided h az bz t where an are determined as products givens rotations they may either be formed explicitly or postmultiplied into input sothat hz tz references golub g van loan c computations th edition johns hopkins university press baltimore moler stewart w algorithm for eigenproblems siam j numer anal mark library manual arguments onentry theorder...