DatePlus[date, n] gives the date n days after date.DatePlus[date, {n, " unit"}] gives the date n units after date.DatePlus[date, {{n_1, "unit_1"}, {n_2, "unit_2"}, ...}] ...
FixedPoint[f, expr] starts with expr, then applies f repeatedly until the result no longer changes.
FourierCoefficient[expr, t, n] gives the n\[Null]^th coefficient in the Fourier series expansion of expr.FourierCoefficient[expr, {t_1, t_2, ...}, {n_1, n_2, ...}] gives a ...
FourierCosTransform[expr, t, \[Omega]] gives the symbolic Fourier cosine transform of expr. FourierCosTransform[expr, {t_1, t_2, ...}, {\[Omega]_1, \[Omega]_2, ...}] gives ...
FourierSinTransform[expr, t, \[Omega]] gives the symbolic Fourier sine transform of expr. FourierSinTransform[expr, {t_1, t_2, ...}, {\[Omega]_1, \[Omega]_2, ...}] gives the ...
GaborWavelet[] represents a Gabor wavelet of frequency 6.GaborWavelet[w] represents a Gabor wavelet of frequency w.
GCD
(Built-in Mathematica Symbol) GCD[n_1, n_2, ...] gives the greatest common divisor of the n_i.
GraphDiameter[g] gives the maximum eccentricity of the vertices in the graph g.
Hypergeometric1F1[a, b, z] is the Kummer confluent hypergeometric function \[Null]_1 F_1 (a; b; z).
IncidenceMatrix[g] gives the vertex-edge incidence matrix of the graph g.