GrayLevel (Built-in Mathematica Symbol)

GrayLevel[level] is a graphics directive that specifies the gray-level intensity with which objects that follow should be displayed. GrayLevel[g, a] specifies opacity a.

GridBox (Built-in Mathematica Symbol)

GridBox[{{box_11, box_12, ...}, {box_21, box_22, ...}, ...}] is a low-level box construct that represents a two-dimensional grid of boxes or strings in notebook expressions.

GridCreationSettings (Built-in Mathematica Symbol)

GridCreationSettings -> {opt_1 -> val_1, opt_2 -> val_2, ...} is a global option that specifies settings for the Create Table/Matrix dialog.

GroupElementPosition (Built-in Mathematica Symbol)

GroupElementPosition[group, g] returns the position of the element g in the list of elements of group.GroupElementPosition[group, {g_1, ..., g_n}] returns the list of ...

GroupSetwiseStabilizer (Built-in Mathematica Symbol)

GroupSetwiseStabilizer[group, {p_1, ..., p_n}] returns the subgroup of group for which the images of the points p_i are still in the list {p_1, ..., p_n}.

HankelH1 (Built-in Mathematica Symbol)

HankelH1[n, z] gives the Hankel function of the first kind H_n^(1)(z).

HankelH2 (Built-in Mathematica Symbol)

HankelH2[n, z] gives the Hankel function of the second kind H_n^(2)(z).

Hash (Built-in Mathematica Symbol)

Hash[expr] gives an integer hash code for the expression expr.Hash[expr, " type"] gives an integer hash code of the specified type for expr.

HermitianMatrixQ (Built-in Mathematica Symbol)

HermitianMatrixQ[m] tests whether m is a Hermitian matrix.

Hold (Built-in Mathematica Symbol)

Hold[expr] maintains expr in an unevaluated form.