HP MLIB User's Guide Vol. 1 7th Ed.

Chapter 3 Basic Matrix Operations 305
Solve triangular band system STBSV/DTBSV/CTBSV/ZTBSV
subprograms, ’C’ and ’c’ have the same meaning as ’T’
and ’t’.
diag Specifies whether the matrix is unit triangular, that is,
a
ii
= 1, or not:
’N’ or ’n’ The diagonal of A is stored in the
array
’U’ or ’u’ The diagonal of A consists of unstored
ones
When diag is supplied as ’U’ or ’u’, diagonal elements of
A are not referenced, but space must be reserved for
them.
n Number of rows and columns in matrix A, n ≥ 0. If
n = 0, the subprograms do not reference ab or x.
kd The number of nonzero diagonals above or below the
principal diagonal. If uplo is supplied as ’U’ or ’u’, kd
specifies the number of nonzero diagonals above the
principal diagonal. If uplo is supplied as ’L’ or ’l’, kd
specifies the number of nonzero diagonals below the
principal diagonal.