CombinatorialFunctions

java.lang.Object
- org.ojalgo.function.special.CombinatorialFunctions

```
public abstract class CombinatorialFunctions
extends java.lang.Object
```
https://reference.wolfram.com/language/tutorial/CombinatorialFunctions.html

Constructor Summary

Constructors
Constructor Description

CombinatorialFunctions()

Method Summary

All Methods Static Methods Concrete Methods
Modifier and Type	Method	Description
`static long`	`partitions(int n, int[] k)`
`static long`	`permutations(int n)`
`static long`	`subsets(int n, int k)`
`static long`	`variations(int n, int k)`

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - CombinatorialFunctions
```
public CombinatorialFunctions()
```
- Method Detail
  - partitions
```
public static long partitions(int n,
                              int[] k)
```
    Parameters:
    
    n - The number of elements in the set
    
    k - A vector of subset sizes the sum of which must equal the size of the full set
    
    Returns:
    
    The number of ways the set can be partitioned in to subsets of the given sizes
  - permutations
```
public static long permutations(int n)
```
    Parameters:
    
    n - The number of elements in the set
    
    Returns:
    
    The number of permutations of the set
  - subsets
```
public static long subsets(int n,
                           int k)
```
    Parameters:
    
    n - The number of elements in the set
    
    k - The number of elements in the subset
    
    Returns:
    
    The number of subsets to the set
  - variations
```
public static long variations(int n,
                              int k)
```
    Parameters:
    
    n - The number of elements in the set
    
    k - The size of the tuple
    
    Returns:
    
    The number of ordered k-tuples (variations) of the set