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IRIX 6.2 Development Libraries
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ELMBAK.z
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ELMBAK
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Text File
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1996-03-14
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3KB
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67 lines
____EEEELLLLMMMMBBBBAAAAKKKK((((3333FFFF)))) ____EEEELLLLMMMMBBBBAAAAKKKK((((3333FFFF))))
NNNNAAAAMMMMEEEE
ELMBAK, SELMBAK - EISPACK routine. This subroutine forms the
eigenvectors of a REAL GENERAL matrix by back transforming those of the
corresponding upper Hessenberg matrix determined by ELMHES.
SSSSYYYYNNNNOOOOPPPPSSSSYYYYSSSS
ssssuuuubbbbrrrroooouuuuttttiiiinnnneeee eeeellllmmmmbbbbaaaakkkk((((nnnnmmmm,,,, lllloooowwww,,,, iiiigggghhhh,,,, aaaa,,,, iiiinnnntttt,,,, mmmm,,,, zzzz))))
iiiinnnntttteeeeggggeeeerrrr nnnnmmmm,,,, lllloooowwww,,,, iiiigggghhhh,,,, mmmm,,,, iiiinnnntttt((((iiiigggghhhh))))
ddddoooouuuubbbblllleeee pppprrrreeeecccciiiissssiiiioooonnnn aaaa((((nnnnmmmm,,,,iiiigggghhhh)))),,,, zzzz((((nnnnmmmm,,,,mmmm))))
ssssuuuubbbbrrrroooouuuuttttiiiinnnneeee sssseeeellllmmmmbbbbaaaakkkk((((nnnnmmmm,,,, lllloooowwww,,,, iiiigggghhhh,,,, aaaa,,,, iiiinnnntttt,,,, mmmm,,,, zzzz))))
iiiinnnntttteeeeggggeeeerrrr nnnnmmmm,,,, lllloooowwww,,,, iiiigggghhhh,,,, mmmm,,,, iiiinnnntttt((((iiiigggghhhh))))
rrrreeeeaaaallll aaaa((((nnnnmmmm,,,,iiiigggghhhh)))),,,, zzzz((((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 BALANC.
If BALANC has not been used, set LOW=1 and IGH equal to the order of
the matrix.
AAAA contains the multipliers which were used in the reduction by ELMHES
in its lower triangle below the subdiagonal.
IIIINNNNTTTT contains information on the rows and columns interchanged in the
reduction by ELMHES. Only elements LOW through IGH are used.
MMMM is the number of columns of Z to be back transformed.
ZZZZ contains the real and imaginary parts of the eigen- vectors to be back
transformed in its first M columns. On OUTPUT
ZZZZ contains the real and imaginary parts of the transformed eigenvectors
in its first M columns. Questions and comments should be directed to B.
S. Garbow, APPLIED MATHEMATICS DIVISION, ARGONNE NATIONAL LABORATORY
PPPPaaaaggggeeee 1111