SelectionEvaluate[notebook] replaces the current selection in a notebook with the result obtained by evaluating the contents of the selection in the kernel. ...
SelectionMove[obj, dir, unit] moves the current selection in an open notebook in the front end in the direction dir by the specified unit. SelectionMove[obj, dir, unit, n] ...
Select
(Built-in Mathematica Symbol) Select[list, crit] picks out all elements e_i of list for which crit[e_i] is True. Select[list, crit, n] picks out the first n elements for which crit[e_i] is True.
SelfLoopStyle is an option for GraphPlot and related functions that specifies how to draw self-loops that connect a vertex to itself.
SemialgebraicComponentInstances[ineqs, {x_1, x_2, ...}] gives at least one sample point in each connected component of the semialgebraic set defined by the inequalities ineqs ...
SendMail[rules] sends an email message built up from the elements specified in rules.
SequenceAlignment[s_1, s_2] finds an optimal alignment of sequences of elements in the strings or lists s_1 and s_2, and yields a list of successive matching and differing ...
SequenceHold is an attribute that specifies that Sequence objects appearing in the arguments of a function should not automatically be flattened out.
Sequence[expr_1, expr_2, ...] represents a sequence of arguments to be spliced automatically into any function.
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}] ...