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# Function setPowerset

Create the powerset of a (multi)set. (The powerset contains very possible subsets of a (multi)set.)
A multi-dimension array will be converted to a single-dimension array before the operation.


## Syntax

```js
math.setPowerset(set)
```

### Parameters

Parameter | Type | Description
--------- | ---- | -----------
`a` | Array &#124; Matrix | A (multi)set

### Returns

Type | Description
---- | -----------
Array | The powerset of the (multi)set


## Examples

```js
math.setPowerset([1, 2, 3])        // returns [[], [1], [2], [3], [1, 2], [1, 3], [2, 3], [1, 2, 3]]
```


## See also

[setCartesian](setCartesian.md)