| QcholUtDU | 'UtDU' decomposition of a rational matrix | 
| Qdet | Determinant of a rational matrix | 
| Qinverse | Inverse of a rational matrix | 
| QisInjective | Check injectivity | 
| QisInvertible | Check invertibility | 
| QisSurjective | Check surjectivity | 
| Qkernel | Kernel of a rational matrix | 
| Qrange | Range of a rational matrix | 
| Qrank | Rank of a rational matrix |