| F04JAF | Minimal least-squares solution of m real equations in n unknowns, rank ≤ n, m ≥ n |
| F04JDF | Minimal least-squares solution of m real equations in n unknowns, rank ≤ n, m ≥ n |
| F04JGF | Least-squares (if rank = n) or minimal least-squares (if rank < n) solution of m real equations in n unknowns, rank ≤ n, m ≥ n |