ReverseGraph[g] gives the reverse graph of the directed g.
Reverse
(Built-in Mathematica Symbol) Reverse[expr] reverses the order of the elements in expr. Reverse[expr, n] reverses elements at level n in expr.Reverse[expr, {n_1, n_2, ...}] reverses elements at levels ...
RevolutionAxis is an option for RevolutionPlot3D which specifies the revolution axis around which the curve should be rotated.
RotateLabel is an option for graphics and related functions that specifies whether labels on vertical frame axes should be rotated to be vertical.
RowBox
(Built-in Mathematica Symbol) RowBox[{box_1, box_2, ...}] is a low-level box construct that represents a row of boxes or strings in a notebook expression.
Run
(Built-in Mathematica Symbol) Run[expr_1, expr_2, ...] generates the printed form of the expressions expr_i, separated by spaces, and runs it as an external operating system command.
SameQ
(Built-in Mathematica Symbol) lhs === rhs yields True if the expression lhs is identical to rhs, and yields False otherwise.
SampledSoundList[{a_1, a_2, ...}, r] is a sound primitive that represents a sound whose amplitude has levels a_i sampled r times a second.
SatisfiableQ[bf] gives True if a combination of values of variables exists that makes the Boolean function bf yield True.SatisfiableQ[expr, {a_1, a_2, ...}] gives True if a ...
ScheduledTaskObject[id, expr, spec, ...] is a task object specifying future evaluation of expr according to spec.