### The Maxima on-line user's manual

Algebra Calculator

#### Ratdenom

Function: ratdenom (<expr>) Returns the denominator of <expr>, after coercing <expr> to a canonical rational expression (CRE). The return value is a CRE.

<expr> is coerced to a CRE by `rat` if it is not already a CRE. This conversion may change the form of <expr> by putting all terms over a common denominator.

`denom` is similar, but returns an ordinary expression instead of a CRE. Also, `denom` does not attempt to place all terms over a common denominator, and thus some expressions which are considered ratios by `ratdenom` are not considered ratios by `denom`.

There are also some inexact matches for `ratdenom`. Try `?? ratdenom` to see them.

```(%o1)                                true
(%i2) ```

### Related Examples

##### ratdenom

ratdenom(3/(x+y)^2 - ...

Calculate

##### ratdenom-sqrt

ratdenom(1/sqrt(2));

Calculate

##### ratdenom-ratsimp-rhs-solve

E0:[vOut=-1*vX*A,(vI-...

E1:solve(E0,[vOut,v...

E2:E1[1][1]/vI;

Calculate

##### ratdenom-sqrt

ratdenom(1/(sqrt(2)+s...

Calculate

##### ratdenom-ratsimp-rhs-solve

E0:[vOut=-1*vX*A,(vI-...

E1:solve(E0,[vOut,v...

E2:E1[1][1]/vI;

Calculate

##### ratdenom

ratdenom(3/(x+y)^2 - ...

Calculate

##### ratdenom-ratsimp-rhs-solve

E0:[vOut=-1*vX*A,(vI-...

E1:solve(E0,[vOut,v...

E2:E1[1][1]/vI;

Calculate

##### ratdenom-ratsimp-rhs-solve

E0:[vOut=-1*vX*A,(vI-...

E1:solve(E0,[vOut,v...

E2:E1[1][1]/vI;

Calculate

##### ratdenom

ratdenom(3/(x+y)^2 - ...

Calculate

? ratdenom;

Calculate