Padding
(Built-in Mathematica Symbol) Padding is an option to various array and image operations that specifies what padding to use when extending beyond the original data specified.
PermutationCycles[perm] gives a disjoint cycle representation of permutation perm.
Placeholder[name] represents a placeholder labeled with name that indicates a place to type.Placeholder[] gives the empty placeholder \[Placeholder].
PodStates is an option for WolframAlpha that determines information about the states of the pods.
PrecedenceForm[expr, prec] prints with expr parenthesized as it would be if it contained an operator with precedence prec.
QRDecomposition[m] yields the QR decomposition for a numerical matrix m. The result is a list {q, r}, where q is an orthogonal matrix and r is an upper-triangular matrix.
ReadProtected is an attribute that prevents values associated with a symbol from being seen.
RecordSeparators is an option for Read, Find, and related functions that specifies the list of strings to be taken as delimiters for records.
ReverseGraph[g] gives the reverse graph of the directed g.
RotationAction is an option for three-dimensional graphics functions that specifies how to render 3D objects when they are interactively rotated.