Sampling Function
The 1-D sampling function is given by
where
is the Dirac Delta Function. The 2-D version is
which can be weighted to
where
is a reliability weight, 
is a density weight (Weighting Function), and 
is a taper.See also Shah Function, Sinc Function- Series Inversion
- Series Multisection
- Series Reversion
- Serpentine Curve
- Serret-Frenet Formulas
- Set
- Set Difference
- Set Partition
- Set Theory
- Sexagesimal
- Sexdecillion
- Sextic Equation
- Sextic Surface
- Sextillion
- Sexy Primes
- Seydewitz's Theorem
- Sgn
- Shadow
- Shadowing Theorem
- Shafarevich Conjecture
- Shah Function
- Shah-Wilson Constant
- Shallit Constant
- Shallow Diagonal
- Shanks' Algorithm