Divergenceless Field
A divergenceless field, also called a Solenoidal Field, is a Field for which 
. Therefore, there exists a 
such that 
. Furthermore, 
can be written as
 | (1) |
 |  |  | (2) |
 | |  | (3) |
Following Lamb,
and 
are called Toroidal Field and Poloidal Field.See also Beltrami Field, Irrotational Field, Poloidal Field, Solenoidal Field, Toroidal Field- Saddle
- Saddle-Node Bifurcation
- Saddle Point (Fixed Point)
- Saddle Point (Function)
- Saddle Point (Game)
- Safarevich Conjecture
- Safe
- Sagitta
- Saint Andrew's Cross
- Saint Anthony's Cross
- Saint Petersburg Paradox
- Sal
- Salamin Formula
- Salem Constants
- Salesman Problem
- Salient Point
- Salinon
- Salmon's Theorem
- Saltus
- Sample Proportion
- Sample Space
- Sample Variance
- Sampling
- Sampling Function
- Sampling Theorem