NotElement[x, dom] or x \[NotElement] dom asserts that x is not an element of the domain dom.NotElement[x_1 | ... | x_n, dom] asserts that none of the x_i are elements of ...

ArcMinute is a unit multiplier.

ArcSecond is a unit multiplier.

Quadrant is a unit multiplier.

EditDistance[u, v] gives the edit or Levenshtein distance between strings or vectors u and v.

KroneckerDelta[n_1, n_2, ...] gives the Kronecker delta \[Delta] Subscript[n, 1] Subscript[n, 2] ..., equal to 1 if all the n_i are equal, and 0 otherwise.

YuleDissimilarity[u, v] gives the Yule dissimilarity between Boolean vectors u and v.

Mathematica supports a large collection of relational operator characters, each of which can also be used as an element of Mathematica syntax, representing a formal operator ...

Chop[expr] replaces approximate real numbers in expr that are close to zero by the exact integer 0.

DamerauLevenshteinDistance[u, v] gives the Damerau\[Dash]Levenshtein distance between strings or vectors u and v.