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- ____CCCCOOOORRRRTTTTHHHH((((3333FFFF)))) ____CCCCOOOORRRRTTTTHHHH((((3333FFFF))))
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- NNNNAAAAMMMMEEEE
- CORTH, SCORTH - EISPACK routine. Given a COMPLEX GENERAL matrix, this
- subroutine reduces a submatrix situated in rows and columns LOW through
- IGH to upper Hessenberg form by unitary similarity transformations.
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- SSSSYYYYNNNNOOOOPPPPSSSSYYYYSSSS
- ssssuuuubbbbrrrroooouuuuttttiiiinnnneeee ccccoooorrrrtttthhhh((((nnnnmmmm,,,, nnnn,,,, lllloooowwww,,,, iiiigggghhhh,,,, aaaarrrr,,,, aaaaiiii,,,, oooorrrrttttrrrr,,,, oooorrrrttttiiii))))
- iiiinnnntttteeeeggggeeeerrrr nnnnmmmm,,,, nnnn,,,, lllloooowwww,,,, iiiigggghhhh
- ddddoooouuuubbbblllleeee pppprrrreeeecccciiiissssiiiioooonnnn aaaarrrr((((nnnnmmmm,,,,nnnn)))),,,, aaaaiiii((((nnnnmmmm,,,,nnnn)))),,,, oooorrrrttttrrrr((((iiiigggghhhh)))),,,, oooorrrrttttiiii((((iiiigggghhhh))))
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- ssssuuuubbbbrrrroooouuuuttttiiiinnnneeee ssssccccoooorrrrtttthhhh((((nnnnmmmm,,,, nnnn,,,, lllloooowwww,,,, iiiigggghhhh,,,, aaaarrrr,,,, aaaaiiii,,,, oooorrrrttttrrrr,,,, oooorrrrttttiiii))))
- iiiinnnntttteeeeggggeeeerrrr nnnnmmmm,,,, nnnn,,,, lllloooowwww,,,, iiiigggghhhh
- rrrreeeeaaaallll aaaarrrr((((nnnnmmmm,,,,nnnn)))),,,, aaaaiiii((((nnnnmmmm,,,,nnnn)))),,,, oooorrrrttttrrrr((((iiiigggghhhh)))),,,, oooorrrrttttiiii((((iiiigggghhhh))))
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- DDDDEEEESSSSCCCCRRRRIIIIPPPPTTTTIIIIOOOONNNN
- 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 matrix.
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- LLLLOOOOWWWW and IGH are integers determined by the balancing subroutine CBAL.
- If CBAL has not been used, set LOW=1, IGH=N.
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- AAAARRRR and AI contain the real and imaginary parts, respectively, of the
- complex input matrix. On OUTPUT
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- AAAARRRR and AI contain the real and imaginary parts, respectively, of the
- Hessenberg matrix. Information about the unitary transformations used in
- the reduction is stored in the remaining triangles under the Hessenberg
- matrix.
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- OOOORRRRTTTTRRRR and ORTI contain further information about the transformations.
- Only elements LOW through IGH are used. Calls PYTHAG(A,B) for sqrt(A**2
- + B**2). 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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