__Function:__gsl_permutation ***gsl_permutation_alloc***(size_t*`n`)-
This function allocates memory for a new permutation of size
`n`. The permutation is not initialized and its elements are undefined. Use the function`gsl_permutation_calloc`

if you want to create a permutation which is initialized to the identity. A null pointer is returned if insufficient memory is available to create the permutation.

__Function:__gsl_permutation ***gsl_permutation_calloc***(size_t*`n`)-
This function allocates memory for a new permutation of size
`n`and initializes it to the identity. A null pointer is returned if insufficient memory is available to create the permutation.

__Function:__void**gsl_permutation_init***(gsl_permutation **`p`)-
This function initializes the permutation
`p`to the identity, i.e. @math{(0,1,2,...,n-1)}.

__Function:__void**gsl_permutation_free***(gsl_permutation **`p`)-
This function frees all the memory used by the permutation
`p`.

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