PolyGamma[z] gives the digamma function \[Psi](z). PolyGamma[n, z] gives the n\[Null]^th derivative of the digamma function \[Psi] (n) (z).
ParticleData[name, " property"] gives the specified property for a subatomic particle or family of particles with the specified name. ParticleData[{name, q}, " property"] ...
RayleighDistribution[\[Sigma]] represents the Rayleigh distribution with scale parameter \[Sigma].
The functionality of FactorIntegerECM can be obtained using the enhanced Mathematica kernel function FactorInteger.
Quaternions is an option for PrimeQ which specifies whether factorization should be done over the quaternions.
CoefficientList[poly, var] gives a list of coefficients of powers of var in poly, starting with power 0. CoefficientList[poly, {var_1, var_2, ...}] gives an array of ...
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 ...
Gather
(Built-in Mathematica Symbol) Gather[list] gathers the elements of list into sublists of identical elements.Gather[list, test] applies test to pairs of elements to determine if they should be considered ...
InverseFourierSequenceTransform[expr, \[Omega], n] gives the inverse discrete-time Fourier transform of expr.InverseFourierSequenceTransform[expr, {\[Omega]_1, \[Omega]_2, \ ...
Precision[x] gives the effective number of digits of precision in the number x.