p ... or RepeatedNull[p] is a pattern object that represents a sequence of zero or more expressions, each matching p.

Return[expr] returns the value expr from a function. Return[] returns the value Null.

Riffle[{e_1, e_2, ...}, x] gives {e_1, x, e_2, x, ...}. Riffle[{e_1, e_2, ...}, {x_1, x_2, ...}] gives {e_1, x_1, e_2, x_2, ...}. Riffle[list, x, n] yields a list in which ...

RowLines is an option for the low-level function GridBox that specifies whether lines should be drawn between adjacent rows.

RowsEqual is an option for the low-level function GridBox that specifies whether all rows in the grid should be assigned equal total height.

ScalingTransform[{s_x, s_y, ...}] gives a TransformationFunction that represents scaling by a factor s_i along each coordinate axis from the origin.ScalingTransform[{s_x, ...

ScheduledTasks[] returns a list of ScheduledTaskObject expressions that represent current tasks.

SchurDecomposition[m] yields the Schur decomposition for a numerical matrix m, given as a list {q, t} where q is an orthonormal matrix and t is a block upper-triangular ...

SequenceHold is an attribute that specifies that Sequence objects appearing in the arguments of a function should not automatically be flattened out.

SeriesCoefficient[series, n] finds the coefficient of the n\[Null]\[Null]^th-order term in a power series in the form generated by Series. SeriesCoefficient[f, {x, x_0, n}] ...