## PERMANENT

### Permanent

The permanent of a square matrix in linear algebra is a function of the matrix similar to the determinant. The permanent, as well as the determinant, is a polynomial in the entries of the matrix. Both permanent and determinant are special cases of a more general function of a matrix called the immanant.

The above text is a snippet from Wikipedia: Permanent

### permanent

#### Noun

1. A chemical hair treatment imparting or removing curliness, whose effects typically last for a period of weeks; a perm.
2. Given an $n \times n$ matrix $a_{ij} \,$, the sum over all permutations $\pi \,$ of $\prod_{i=1}^n{a_{i\pi(i)}}$.

#### Verb

1. To perm (the hair).