ExtendedGCD[n_1, n_2, ...] gives the extended greatest common divisor of the integers n_i.
FontProperties -> {opt_1 -> val_1, opt_2 -> val_2} specifies font properties.
FourierSequenceTransform[expr, n, \[Omega]] gives the Fourier sequence transform of expr.FourierSequenceTransform[expr, {n_1, n_2, ...}, {\[Omega]_1, \[Omega]_2, ...}] gives ...
Glaisher is Glaisher's constant with numerical value \[TildeEqual] 1.28243.
HoldFirst is an attribute which specifies that the first argument to a function is to be maintained in an unevaluated form.
HoldRest is an attribute which specifies that all but the first argument to a function are to be maintained in an unevaluated form.
ImageRegion is an option for cells that specifies the size and position of the bounding box within which a graphic is rendered.
IntegerQ[expr] gives True if expr is an integer, and False otherwise.
LineIndent is an option for Style and Cell that specifies how many ems of indentation to add at the beginnings of lines for each level of nesting in an expression.
LinkCreate["name"] creates a MathLink link with the specified name for another program to connect to. LinkCreate[] creates a MathLink link and picks an unused name for the ...