| F01LEF | LU factorization of real tridiagonal matrix |
| F04BCF | Computes the solution and error-bound to a real tridiagonal system of linear equations |
| F04LEF | Solution of real tridiagonal simultaneous linear equations (coefficient matrix already factorized by F01LEF) |
| F07CBF | Uses the LU factorization to compute the solution, error-bound and condition estimate for a real tridiagonal system of linear equations |