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

660 HP MLIB LAPACK User’s Guide
SLANGB/DLANGB/CLANGB/ZLANGB Compute norm of general band matrix
Output anorm The function value is the value of the requested norm
of A.
Notes Actual character arguments in a subroutine call may be longer than the
corresponding dummy arguments. Therefore, readability of the CALL
statement may be improved by coding the norm argument as ’Frobenius’ for ’F’,
’Infinity-Norm’ for ’I’, ’One-norm’ or ’1-norm’ for ’O’, or ’Max-Element’ for ’M’.