OpenAppend["file"] opens a file to append output to it, and returns an OutputStream object.
OpenWrite["file"] opens a file to write output to it, and returns an OutputStream object. OpenWrite[] opens a new file in the default area for temporary files on your ...
ParabolicCylinderD[\[Nu], z] gives the parabolic cylinder function D_\[Nu] (z).
ParagraphSpacing is an option for Cell, StyleBox, and Style that specifies how much extra space to leave between successive paragraphs of text.
PathGraphQ[g] yields True if the graph g is a path and False otherwise.
PaulWavelet[] represents a Paul wavelet of order 4.PaulWavelet[n] represents a Paul wavelet of order n.
PermutationPower[perm, n] gives the n\[Null]^th permutation power of the permutation perm.
Pi
(Built-in Mathematica Symbol) Pi is \[Pi], with numerical value \[TildeEqual] 3.14159.
Placed
(Built-in Mathematica Symbol) Placed[expr, pos] represents an expression expr placed at relative position pos in a chart or other display. Placed[{e_1, e_2, ...}, pos] places each of the e_i at a relative ...
PlotLabel is an option for graphics functions that specifies an overall label for a plot.