mirror of
https://github.com/josdejong/mathjs.git
synced 2026-01-25 15:07:57 +00:00
43 lines
869 B
Markdown
43 lines
869 B
Markdown
<!-- Note: This file is automatically generated from source code comments. Changes made in this file will be overridden. -->
|
|
|
|
# Function stirlingS2
|
|
|
|
The Stirling numbers of the second kind, counts the number of ways to partition
|
|
a set of n labelled objects into k nonempty unlabelled subsets.
|
|
stirlingS2 only takes integer arguments.
|
|
The following condition must be enforced: k <= n.
|
|
|
|
If n = k or k = 1, then s(n,k) = 1
|
|
|
|
|
|
## Syntax
|
|
|
|
```js
|
|
math.stirlingS2(n, k)
|
|
```
|
|
|
|
### Parameters
|
|
|
|
Parameter | Type | Description
|
|
--------- | ---- | -----------
|
|
`n` | Number | BigNumber | Total number of objects in the set
|
|
`k` | Number | BigNumber | Number of objects in the subset
|
|
|
|
### Returns
|
|
|
|
Type | Description
|
|
---- | -----------
|
|
Number | BigNumber | S(n,k)
|
|
|
|
|
|
## Examples
|
|
|
|
```js
|
|
math.stirlingS2(5, 3); //returns 25
|
|
```
|
|
|
|
|
|
## See also
|
|
|
|
[Bell numbers](Bell numbers.md)
|