e/Itoh-Tsujii inversion algorithm

Information
has gloss	eng: The Itoh-Tsujii inversion algorithm is used to invert elements in a finite field. It was introduced in 1988 and first used over GF(2m) using the normal basis representation of elements, however the algorithm is generic and can be used for other bases, such as the polynomial basis. It can also be used in any finite field, GF(pm).
lexicalization	eng: Itoh-Tsujii inversion algorithm
instance of	e/Finite field