PolarAxes is an option for sector charts and polar plots that specifies whether polar axes should be drawn.
PolynomialExtendedGCD[poly_1, poly_2, x] gives the extended GCD of poly_1 and poly_2 treated as univariate polynomials in x.PolynomialExtendedGCD[poly_1, poly_2, x, Modulus ...
ReflectionTransform[v] gives a TransformationFunction that represents a reflection in a mirror through the origin, normal to the vector v.ReflectionTransform[v, p] gives a ...
Remove
(Built-in Mathematica Symbol) Remove[symbol_1, ...] removes symbols completely, so that their names are no longer recognized by Mathematica. Remove["form_1", "form_2", ...] removes all symbols whose names ...
ReturnTextPacket[string] is a MathLink packet containing string, the result of an EnterTextPacket evaluation.
RowAlignments is an option for the low-level function GridBox that specifies how entries in each row should be aligned.
ScriptBaselineShifts is an option for Style that specifies the minimum distance in x-heights to shift subscripts and superscripts.
ScriptMinSize is an option for Style that specifies the minimum font size to use in rendering subscripts, etc.
ShowPageBreaks is a notebook option that specifies whether to indicate in the on-screen display of a notebook where page breaks would occur if the notebook were printed.
StringToStream["string"] opens an input stream for reading from a string.