Matrices and are the same as in Example for **LA_PTSV**.

The call:

**CALL LA_PTSVX( D, E, B, X, FERR**=FERR**, BERR**=BERR**, RCOND**=RCOND** ) **

and on exit:

The forward and backward errors of the three solution vectors are:

The estimate of the reciprocal condition number of matrix is

The solution of the system is:

Susan Blackford 2001-08-19