Normalizer
A set of elements 
of a Group such that
is said to be the normalizer
with respect to a subset of group elements 
.See also Centralizer, Tightly Embedded- Special Function
- Special Linear Group
- Special Matrix
- Special Orthogonal Group
- Special Point
- Special Series Theorem
- Special Unitary Group
- Species
- Specificity
- Spectral Norm
- Spectral Power Density
- Spectral Radius
- Spectral Rigidity
- Spectral Theorem
- Spectrum (Operator)
- Spectrum Sequence
- Speed
- Spencer's 15-Point Moving Average
- Spence's Function
- Spence's Integral
- Sperner's Theorem
- Sphenocorona
- Sphenoid
- Sphenomegacorona
- Sphere