Determinant
... Here the sum is computed over all permutations σ of the numbers {1, 2, ..., n}. A permutation is a function that reorders this set of integers. For example, for n = 3, the original sequence 1, 2, 3 might be reordered to 2, 3, 1 or 3, 2, 1. It is a basic fact of combinatorics that there are n! = 1 · ...
... Here the sum is computed over all permutations σ of the numbers {1, 2, ..., n}. A permutation is a function that reorders this set of integers. For example, for n = 3, the original sequence 1, 2, 3 might be reordered to 2, 3, 1 or 3, 2, 1. It is a basic fact of combinatorics that there are n! = 1 · ...
