### 11.6.4 Denominator after simplification

The denom command finds the denominator of a rational function after it has been reduced. (See also Section 7.2.4.)

- denom takes rat, a rational function.
- denom(rat) returns the denominator of the irreducible representation of rat.

#### Examples

denom((x^2-1)/(x-1))

1 |  |  |  |  |  |  |  |  |  |

denom((x^2+2*x+1)/(x^2-1))

x−1 |  |  |  |  |  |  |  |  |  |