GraphicsComplex[{pt_1, pt_2, ...}, data] represents a graphics complex in which coordinates given as integers i in graphics primitives in data are taken to be pt_i.
I
(Built-in Mathematica Symbol) I represents the imaginary unit Sqrt[-1].
JacobiDN[u, m] gives the Jacobi elliptic function dn(u | m).
LatticeData[lattice, " property"] gives the specified property for a lattice.LatticeData[n] gives a list of named lattices of dimension n.
Limit
(Built-in Mathematica Symbol) Limit[expr, x -> x_0] finds the limiting value of expr when x approaches x_0.
LocatorPane[{x, y}, back] represents a pane with a locator at position {x, y} and background back.LocatorPane[Dynamic[pt], back] takes the locator position to be the ...
Pochhammer[a, n] gives the Pochhammer symbol (a) n.
RegularExpression["regex"] represents the generalized regular expression specified by the string " regex".
Row
(Built-in Mathematica Symbol) Row[{expr_1, expr_2, ...}] is an object that formats with the expr_i arranged in a row, potentially extending over several lines. Row[list, s] inserts s as a separator ...
RowReduce[m] gives the row-reduced form of the matrix m.