system

**Usage**

system( )

system(L)

Parameter |
Type |
Description |
---|---|---|

The entries of a square matrix | ||

L |
A difference operator |

**Returns**

system( ) returns the system , where is the square matrix given by the 's, while system(L) returns the companion system associated with the operator L.

**Remarks**

The entries of the matrix must be listed by rows.

**Example**

The system

has the following rational kernel:

1 --> A := system((2*n^2+4*n)/(n^2+n),(-n^2-3*n-2)/(n^2+n),1,0); 2 --> K := kernel(A); 3 --> tex(K);

Manuel Bronstein 2002-09-04