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- ____QQQQZZZZHHHHEEEESSSS((((3333FFFF)))) ____QQQQZZZZHHHHEEEESSSS((((3333FFFF))))
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- NNNNAAAAMMMMEEEE
- QZHES, SQZHES - EISPACK routine. This subroutine is the first step of
- the QZ algorithm for solving generalized matrix eigenvalue problems.
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- SSSSYYYYNNNNOOOOPPPPSSSSYYYYSSSS
- ssssuuuubbbbrrrroooouuuuttttiiiinnnneeee qqqqzzzzhhhheeeessss((((nnnnmmmm,,,, nnnn,,,, aaaa,,,, bbbb,,,, mmmmaaaattttzzzz,,,, zzzz))))
- iiiinnnntttteeeeggggeeeerrrr nnnnmmmm,,,, nnnn
- ddddoooouuuubbbblllleeee pppprrrreeeecccciiiissssiiiioooonnnn aaaa((((nnnnmmmm,,,,nnnn)))),,,, bbbb((((nnnnmmmm,,,,nnnn)))),,,, zzzz((((nnnnmmmm,,,,nnnn))))
- llllooooggggiiiiccccaaaallll mmmmaaaattttzzzz
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- ssssuuuubbbbrrrroooouuuuttttiiiinnnneeee ssssqqqqzzzzhhhheeeessss((((nnnnmmmm,,,, nnnn,,,, aaaa,,,, bbbb,,,, mmmmaaaattttzzzz,,,, zzzz))))
- iiiinnnntttteeeeggggeeeerrrr nnnnmmmm,,,, nnnn
- rrrreeeeaaaallll aaaa((((nnnnmmmm,,,,nnnn)))),,,, bbbb((((nnnnmmmm,,,,nnnn)))),,,, zzzz((((nnnnmmmm,,,,nnnn))))
- llllooooggggiiiiccccaaaallll mmmmaaaattttzzzz
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- DDDDEEEESSSSCCCCRRRRIIIIPPPPTTTTIIIIOOOONNNN
- This subroutine accepts a pair of REAL GENERAL matrices and reduces one
- of them to upper Hessenberg form and the other to upper triangular form
- using orthogonal transformations. It is usually followed by QZIT,
- QZVAL and, possibly, QZVEC.
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- On Input
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- NNNNMMMM must be set to the row dimension of two-dimensional array parameters
- as declared in the calling program dimension statement.
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- NNNN is the order of the matrices.
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- AAAA contains a real general matrix.
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- BBBB contains a real general matrix.
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- MMMMAAAATTTTZZZZ should be set to .TRUE. if the right hand transformations are to be
- accumulated for later use in computing eigenvectors, and to .FALSE.
- otherwise. On Output
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- AAAA has been reduced to upper Hessenberg form. The elements below the
- first subdiagonal have been set to zero.
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- BBBB has been reduced to upper triangular form. The elements below the main
- diagonal have been set to zero.
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- ZZZZ contains the product of the right hand transformations if MATZ has been
- set to .TRUE. Otherwise, Z is not referenced. Questions and comments
- should be directed to B. S. Garbow, APPLIED MATHEMATICS DIVISION, ARGONNE
- NATIONAL LABORATORY
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- PPPPaaaaggggeeee 1111
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