RamanujanTauL[s] gives the Ramanujan tau Dirichlet L-function L(s).
ReflectionMatrix[v] gives the matrix that represents reflection of points in a mirror normal to the vector v.
RegionBinarize[image, marker, d] gives a binary version of image that includes the foreground pixels of marker and also connected regions whose pixel values are within a ...
RootMeanSquare[list] gives the root mean square of values in list.
SatisfiabilityInstances[bf] attempts to find a choice of variables that makes the Boolean function bf yield True.SatisfiabilityInstances[expr, {a_1, a_2, ...}] attempts to ...
ScalingMatrix[{s_x, s_y, ...}] gives the matrix corresponding to scaling by a factor s_i along each coordinate axis.ScalingMatrix[s, v] gives the matrix corresponding to ...
SeedRandom[n] resets the pseudorandom generator, using n as a seed. SeedRandom[] resets the generator, using as a seed the time of day and certain attributes of the current ...
Sinc
(Built-in Mathematica Symbol) Sinc[z] gives sinc(z).
SinghMaddalaDistribution[q, a, b] represents the Singh\[Dash]Maddala distribution with shape parameters q and a and scale parameter b.
SquaredEuclideanDistance[u, v] gives the squared Euclidean distance between vectors u and v.