FourierParameters is an option to Fourier and related functions that specifies the conventions to use in computing Fourier transforms.
FrameTicksStyle is an option for 2D graphics functions that specifies how frame ticks should be rendered.
FreeQ
(Built-in Mathematica Symbol) FreeQ[expr, form] yields True if no subexpression in expr matches form, and yields False otherwise. FreeQ[expr, form, levelspec] tests only those parts of expr on levels ...
FrobeniusNumber[{a_1, ..., a_n}] gives the Frobenius number of a_1, ..., a_n.
FromCharacterCode[n] gives a string consisting of the character with integer code n. FromCharacterCode[{n_1, n_2, ...}] gives a string consisting of the sequence of ...
GaussianIntegers is an option for FactorInteger, PrimeQ, Factor, and related functions that specifies whether factorization should be done over Gaussian integers.
Glow
(Built-in Mathematica Symbol) Glow[col] is a graphics directive which specifies that surfaces of 3D graphics objects that follow are to be taken to glow with color col. Glow[] specifies that there is no ...
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[n, z] gives the Hankel function of the first kind H_n^(1)(z).
HankelH2[n, z] gives the Hankel function of the second kind H_n^(2)(z).