hypermatrix
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Hyperdeterminant — In algebra, the hyperdeterminant is a generalisation of the determinant. Whereas a determinant is a scalar valued function defined on an n x n square matrix, a hyperdeterminant is defined on a multidimensional array of numbers or hypermatrix.… … Wikipedia
Trie — A trie for keys A , to , tea , ted , ten , i , in , and inn . In computer science, a trie, or prefix tree, is an ordered tree data structure that is used to store an associative array where the keys are usually strings. Unlike a binary search… … Wikipedia