HP MLIB User's Guide Vol. 2 7th Ed.

678 HP MLIB LAPACK User’s Guide
SLANST/DLANST/CLANHT/ZLANHT Compute norm of symmetric or Hermitian tridiagonal matrix
CHARACTER*1 norm
INTEGER*8 n
REAL*4 d(n)
COMPLEX*8 e(n−1)
REAL*4 anorm, CLANHT
anorm = CLANHT(norm, n, d, e)
CHARACTER*1 norm
INTEGER*8 n
REAL*8 d(n)
COMPLEX*16 e(n−1)
REAL*8 anorm, ZLANHT
anorm = ZLANHT(norm, n, d, e)
Input norm Specifies which norm is to be computed, as follows:
norm = ’F’, ’f’, ’E’, or ’e’ Compute ||A||
F
= the Frobenius
norm.
norm = ’I’ or ’i’ Compute ||A||
∞
= maximum
row sum.
norm = ’1’, ’O’, or ’o’ Compute ||A||
1
= maximum
column sum.
norm = ’M’ or ’m’ Compute max(|A
ij
|).
n The order of the matrix A. n ≥ 0.
d The n diagonal elements of the tridiagonal matrix A.
e The n−1 subdiagonal elements of the tridiagonal
matrix A.