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IRIX Base Documentation 1998 November
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IRIX 6.5.2 Base Documentation November 1998.img
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CORTB.z
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CORTB
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Text File
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1998-10-30
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4KB
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67 lines
____CCCCOOOORRRRTTTTBBBB((((3333FFFF)))) ____CCCCOOOORRRRTTTTBBBB((((3333FFFF))))
NNNNAAAAMMMMEEEE
CORTB, SCORTB - EISPACK routine. This subroutine forms the
eigenvectors of a COMPLEX GENERAL matrix by back transforming those of
the corresponding upper Hessenberg matrix determined by CORTH.
SSSSYYYYNNNNOOOOPPPPSSSSYYYYSSSS
ssssuuuubbbbrrrroooouuuuttttiiiinnnneeee ccccoooorrrrttttbbbb((((nnnnmmmm,,,, lllloooowwww,,,, iiiigggghhhh,,,, aaaarrrr,,,, aaaaiiii,,,, oooorrrrttttrrrr,,,, oooorrrrttttiiii,,,, mmmm,,,, zzzzrrrr,,,, zzzziiii))))
iiiinnnntttteeeeggggeeeerrrr nnnnmmmm,,,, lllloooowwww,,,, iiiigggghhhh,,,, mmmm
ddddoooouuuubbbblllleeee pppprrrreeeecccciiiissssiiiioooonnnn aaaarrrr((((nnnnmmmm,,,,iiiigggghhhh)))),,,, aaaaiiii((((nnnnmmmm,,,,iiiigggghhhh)))),,,, oooorrrrttttrrrr((((iiiigggghhhh)))),,,, oooorrrrttttiiii((((iiiigggghhhh))))
ddddoooouuuubbbblllleeee pppprrrreeeecccciiiissssiiiioooonnnn zzzzrrrr((((nnnnmmmm,,,,mmmm)))),,,, zzzziiii((((nnnnmmmm,,,,mmmm))))
ssssuuuubbbbrrrroooouuuuttttiiiinnnneeee ssssccccoooorrrrttttbbbb((((nnnnmmmm,,,, lllloooowwww,,,, iiiigggghhhh,,,, aaaarrrr,,,, aaaaiiii,,,, oooorrrrttttrrrr,,,, oooorrrrttttiiii,,,, mmmm,,,, zzzzrrrr,,,, zzzziiii))))
iiiinnnntttteeeeggggeeeerrrr nnnnmmmm,,,, lllloooowwww,,,, iiiigggghhhh,,,, mmmm
rrrreeeeaaaallll aaaarrrr((((nnnnmmmm,,,,iiiigggghhhh)))),,,, aaaaiiii((((nnnnmmmm,,,,iiiigggghhhh)))),,,, oooorrrrttttrrrr((((iiiigggghhhh)))),,,, oooorrrrttttiiii((((iiiigggghhhh))))
rrrreeeeaaaallll zzzzrrrr((((nnnnmmmm,,,,mmmm)))),,,, zzzziiii((((nnnnmmmm,,,,mmmm))))
DDDDEEEESSSSCCCCRRRRIIIIPPPPTTTTIIIIOOOONNNN
On INPUT
NNNNMMMM must be set to the row dimension of two-dimensional array parameters
as declared in the calling program dimension statement.
LLLLOOOOWWWW and IGH are integers determined by the balancing subroutine CBAL.
If CBAL has not been used, set LOW=1 and IGH equal to the order of the
matrix.
AAAARRRR and AI contain information about the unitary transformations used in
the reduction by CORTH in their strict lower triangles.
OOOORRRRTTTTRRRR and ORTI contain further information about the transformations used
in the reduction by CORTH. Only elements LOW through IGH are used.
MMMM is the number of columns of ZR and ZI to be back transformed.
ZZZZRRRR and ZI contain the real and imaginary parts, respectively, of the
eigenvectors to be back transformed in their first M columns. On OUTPUT
ZZZZRRRR and ZI contain the real and imaginary parts, respectively, of the
transformed eigenvectors in their first M columns.
OOOORRRRTTTTRRRR and ORTI have been altered. Note that CORTB preserves vector
Euclidean norms. Questions and comments should be directed to B. S.
Garbow, APPLIED MATHEMATICS DIVISION, ARGONNE NATIONAL LABORATORY
PPPPaaaaggggeeee 1111