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IRIX 6.2 Development Libraries
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RSGAB.z
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RSGAB
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Text File
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1996-03-14
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4KB
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67 lines
____RRRRSSSSGGGGAAAABBBB((((3333FFFF)))) ____RRRRSSSSGGGGAAAABBBB((((3333FFFF))))
NNNNAAAAMMMMEEEE
RSGAB, SRSGAB - EISPACK routine. This subroutine calls the
recommended sequence of subroutines from the eigensystem subroutine
package (EISPACK) to find the eigenvalues and eigenvectors (if desired)
for the REAL SYMMETRIC generalized eigenproblem ABx = (LAMBDA)x.
SSSSYYYYNNNNOOOOPPPPSSSSYYYYSSSS
ssssuuuubbbbrrrroooouuuuttttiiiinnnneeee rrrrssssggggaaaabbbb((((nnnnmmmm,,,, nnnn,,,, aaaa,,,, bbbb,,,, wwww,,,, mmmmaaaattttzzzz,,,, zzzz,,,, ffffvvvv1111,,,, ffffvvvv2222,,,, iiiieeeerrrrrrrr))))
iiiinnnntttteeeeggggeeeerrrr nnnn,,,, nnnnmmmm,,,,iiiieeeerrrrrrrr,,,,mmmmaaaattttzzzz
ddddoooouuuubbbblllleeee pppprrrreeeecccciiiissssiiiioooonnnn aaaa((((nnnnmmmm,,,,nnnn)))),,,,bbbb((((nnnnmmmm,,,,nnnn)))),,,,wwww((((nnnn)))),,,,zzzz((((nnnnmmmm,,,,nnnn)))),,,,ffffvvvv1111((((nnnn)))),,,,ffffvvvv2222((((nnnn))))
ssssuuuubbbbrrrroooouuuuttttiiiinnnneeee ssssrrrrssssggggaaaabbbb((((nnnnmmmm,,,, nnnn,,,, aaaa,,,, bbbb,,,, wwww,,,, mmmmaaaattttzzzz,,,, zzzz,,,, ffffvvvv1111,,,, ffffvvvv2222,,,, iiiieeeerrrrrrrr))))
iiiinnnntttteeeeggggeeeerrrr nnnn,,,, nnnnmmmm,,,,iiiieeeerrrrrrrr,,,,mmmmaaaattttzzzz
rrrreeeeaaaallll aaaa((((nnnnmmmm,,,,nnnn)))),,,,bbbb((((nnnnmmmm,,,,nnnn)))),,,,wwww((((nnnn)))),,,,zzzz((((nnnnmmmm,,,,nnnn)))),,,,ffffvvvv1111((((nnnn)))),,,,ffffvvvv2222((((nnnn))))
DDDDEEEESSSSCCCCRRRRIIIIPPPPTTTTIIIIOOOONNNN
On Input
NNNNMMMM must be set to the row dimension of the two-dimensional array
parameters as declared in the calling program dimension statement.
NNNN is the order of the matrices A and B.
AAAA contains a real symmetric matrix.
BBBB contains a positive definite real symmetric matrix.
MMMMAAAATTTTZZZZ is an integer variable set equal to zero if only eigenvalues are
desired. Otherwise it is set to any non-zero integer for both
eigenvalues and eigenvectors. On Output
WWWW contains the eigenvalues in ascending order.
ZZZZ contains the eigenvectors if MATZ is not zero.
IIIIEEEERRRRRRRR is an integer output variable set equal to an error completion code
described in section 2B of the documentation. The normal completion code
is zero.
FFFFVVVV1111 and FV2 are temporary storage arrays. Questions and comments should
be directed to B. S. Garbow, APPLIED MATHEMATICS DIVISION, ARGONNE
NATIONAL LABORATORY
PPPPaaaaggggeeee 1111