Solves a system of linear equations whose coefficients are in a triangular band matrix.
?tbsvroutines solve one of the following systems of equations:
b, or conjg(
nunit, or non-unit, upper or lower triangular band matrix, with
The routine does not test for singularity or near-singularity.
Such tests must be performed before calling this routine.
- Specifies whether the matrixCHARACTER*1.Ais an upper or lower triangular matrix:ifthe matrix is upper triangular;oruplo='U''u'if, the matrix is low triangular.oruplo='L''l'
- Specifies the system of equations:CHARACTER*1.if, thenortrans= 'N''n';A*x=bif, thenortrans= 'T''t';A'*x=bif, thenortrans= 'C''c'conjg(.A')*x=b