Distributed[x, dist] or x \[Distributed] dist asserts that the random variable x is distributed according to the probability distribution dist.Distributed[{x_1, x_2, ...}, ...
ExtendedGCD[n_1, n_2, ...] gives the extended greatest common divisor of the integers n_i.
GeodesicErosion[marker, mask] gives the fixed point of the geodesic erosion of the image marker constrained by the image mask.
JacobiDS[u, m] gives the Jacobi elliptic function ds(u | m).
JacobiSD[u, m] gives the Jacobi elliptic function sd(u | m).
LeastSquares[m, b] finds an x that solves the linear least-squares problem for the matrix equation m.x == b.
MapIndexed[f, expr] applies f to the elements of expr, giving the part specification of each element as a second argument to f. MapIndexed[f, expr, levelspec] applies f to ...
Map
(Built-in Mathematica Symbol) Map[f, expr] or f /@ expr applies f to each element on the first level in expr. Map[f, expr, levelspec] applies f to parts of expr specified by levelspec.
Operate
(Built-in Mathematica Symbol) Operate[p, f[x, y]] gives p[f][x, y]. Operate[p, expr, n] applies p at level n in the head of expr.
Quit
(Built-in Mathematica Symbol) Quit[] terminates a Mathematica kernel session.