### 2.43.11 Image of a linear application : `image`

`image` takes as argument the matrix of an linear
application *f* with respect to the canonical basis.

`image` returns a list of vectors that is a basis of the image
of *f*.

Input :

`image([[1,1,2],[2,1,3],[3,1,4]])`

Output :

`[[-1,0,1],[0,-1,-2]]`