e/Zech's logarithms

Information
has gloss	eng: Zechs logarithms are used with finite fields to reduce a high-degree polynomial that is not in the field to an element in the field (thus having a lower degree). Unlike the traditional logarithm, the Zechs logarithm of a polynomial provides an equivalence — it does not alter the value.
lexicalization	eng: Zech's logarithms
instance of	e/Finite field