- Usage:
`permanents(n,M)`

- Outputs:
- an ideal, generated by the permanents of the
`n`by`n`subpermanents of`M`

- an ideal, generated by the permanents of the

The permanent of a square matrix `N` has the Laplace transform similar to the Laplace transform of the determinant of `N`: but all signs are positive. Permanents are used in combinatorics and in probability. They are computationally difficult.

i1 : R = ZZ[a..f]; |

i2 : M = genericMatrix(R,a,2,3) o2 = | a c e | | b d f | 2 3 o2 : Matrix R <--- R |

i3 : permanents(2,M) o3 = ideal (b*c + a*d, b*e + a*f, d*e + c*f) o3 : Ideal of R |

- determinant -- determinant of a matrix
- minors -- ideal generated by minors
- matrices

- permanents(ZZ,Matrix)