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IRIX 6.2 Development Libraries
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ORTHES.z
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ORTHES
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Text File
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1996-03-14
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3KB
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67 lines
____OOOORRRRTTTTHHHHEEEESSSS((((3333FFFF)))) ____OOOORRRRTTTTHHHHEEEESSSS((((3333FFFF))))
NNNNAAAAMMMMEEEE
ORTHES, SORTHES - EISPACK routine. Given a REAL GENERAL matrix, this
subroutine reduces a submatrix situated in rows and columns LOW through
IGH to upper Hessenberg form by orthogonal similarity transformations.
SSSSYYYYNNNNOOOOPPPPSSSSYYYYSSSS
ssssuuuubbbbrrrroooouuuuttttiiiinnnneeee oooorrrrtttthhhheeeessss((((nnnnmmmm,,,, nnnn,,,, lllloooowwww,,,, iiiigggghhhh,,,, aaaa,,,, oooorrrrtttt))))
iiiinnnntttteeeeggggeeeerrrr nnnnmmmm,,,, nnnn,,,, lllloooowwww,,,, iiiigggghhhh
ddddoooouuuubbbblllleeee pppprrrreeeecccciiiissssiiiioooonnnn aaaa((((nnnnmmmm,,,,nnnn)))),,,, oooorrrrtttt((((iiiigggghhhh))))
ssssuuuubbbbrrrroooouuuuttttiiiinnnneeee ssssoooorrrrtttthhhheeeessss((((nnnnmmmm,,,, nnnn,,,, lllloooowwww,,,, iiiigggghhhh,,,, aaaa,,,, oooorrrrtttt))))
iiiinnnntttteeeeggggeeeerrrr nnnnmmmm,,,, nnnn,,,, lllloooowwww,,,, iiiigggghhhh
rrrreeeeaaaallll aaaa((((nnnnmmmm,,,,nnnn)))),,,, oooorrrrtttt((((iiiigggghhhh))))
DDDDEEEESSSSCCCCRRRRIIIIPPPPTTTTIIIIOOOONNNN
On INPUT
NNNNMMMM must be set to the row dimension of two-dimensional array parameters
as declared in the calling program dimension statement.
NNNN is the order of the matrix.
LLLLOOOOWWWW and IGH are integers determined by the balancing subroutine BALANC.
If BALANC has not been used, set LOW=1, IGH=N.
AAAA contains the input matrix. On OUTPUT
AAAA contains the Hessenberg matrix. Information about the orthogonal
transformations used in the reduction is stored in the remaining triangle
under the Hessenberg matrix.
OOOORRRRTTTT contains further information about the transformations. only elements
LOW through IGH are used. Questions and comments should be directed to
B. S. Garbow, APPLIED MATHEMATICS DIVISION, ARGONNE NATIONAL LABORATORY
PPPPaaaaggggeeee 1111