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IRIX 6.2 Development Libraries
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RST.z
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RST
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Text File
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1996-03-14
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3KB
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67 lines
____RRRRSSSSTTTT((((3333FFFF)))) ____RRRRSSSSTTTT((((3333FFFF))))
NNNNAAAAMMMMEEEE
RST, SRST - EISPACK routine. This subroutine calls the recommended
sequence of subroutines from the eigensystem subroutine package (EISPACK)
to find the eigenvalues and eigenvectors (if desired) of a REAL SYMMETRIC
TRIDIAGONAL matrix.
SSSSYYYYNNNNOOOOPPPPSSSSYYYYSSSS
ssssuuuubbbbrrrroooouuuuttttiiiinnnneeee rrrrsssstttt((((nnnnmmmm,,,, nnnn,,,, wwww,,,, eeee,,,, mmmmaaaattttzzzz,,,, zzzz,,,, iiiieeeerrrrrrrr))))
iiiinnnntttteeeeggggeeeerrrr nnnnmmmm,,,, nnnn,,,, mmmmaaaattttzzzz,,,, iiiieeeerrrrrrrr
ddddoooouuuubbbblllleeee pppprrrreeeecccciiiissssiiiioooonnnn wwww((((nnnn)))),,,, eeee((((nnnn)))),,,, zzzz((((nnnnmmmm,,,,nnnn))))
ssssuuuubbbbrrrroooouuuuttttiiiinnnneeee ssssrrrrsssstttt((((nnnnmmmm,,,, nnnn,,,, wwww,,,, eeee,,,, mmmmaaaattttzzzz,,,, zzzz,,,, iiiieeeerrrrrrrr))))
iiiinnnntttteeeeggggeeeerrrr nnnnmmmm,,,, nnnn,,,, mmmmaaaattttzzzz,,,, iiiieeeerrrrrrrr
rrrreeeeaaaallll wwww((((nnnn)))),,,, eeee((((nnnn)))),,,, zzzz((((nnnnmmmm,,,,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 matrix.
WWWW contains the diagonal elements of the real symmetric tridiagonal
matrix.
EEEE contains the subdiagonal elements of the matrix in its last N-1
POSITIONS. E(1) is arbitrary.
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. Questions and comments should be directed to B. S. Garbow,
APPLIED MATHEMATICS DIVISION, ARGONNE NATIONAL LABORATORY
PPPPaaaaggggeeee 1111