MeshFunctions is an option for plotting functions that specifies functions to use to determine the placement of mesh divisions.
LogGamma[z] gives the logarithm of the gamma function log \[CapitalGamma](z).
Clip
(Built-in Mathematica Symbol) Clip[x] gives x clipped to be between -1 and +1. Clip[x, {min, max}] gives x for min <= x <= max, min for x < min and max for x > max. Clip[x, {min, max}, {v_min, v_max}] ...
ComplexityFunction is an option for Simplify and other functions which gives a function to rank the complexity of different forms of an expression.
IntegerQ[expr] gives True if expr is an integer, and False otherwise.
MachineNumberQ[expr] returns True if expr is a machine-precision real or complex number, and returns False otherwise.
SortBy
(Built-in Mathematica Symbol) SortBy[list, f] sorts the elements of list in the order defined by applying f to each of them.
SumConvergence[f, n] gives conditions for the sum \[Sum]_n^\[Infinity] f to be convergent.SumConvergence[f, {n_1, n_2, ...}] gives conditions for the multiple sum \[Sum]_n ...
RandomComplex[] gives a pseudorandom complex number with real and imaginary parts in the range 0 to 1.RandomComplex[{z_min, z_max}] gives a pseudorandom complex number in the ...
Abs
(Built-in Mathematica Symbol) Abs[z] gives the absolute value of the real or complex number z.