Quaternary
The Base 4 method of counting in which only the Digits 0, 1, 2, and 3 are used.These Digits have the following multiplication table.
 | 0 | 1 | 2 | 3 |
| 0 | 0 | 0 | 0 | 0 |
| 1 | 0 | 1 | 2 | 3 |
| 2 | 0 | 2 | 10 | 12 |
| 3 | 0 | 3 | 12 | 21 |
References
Lauwerier, H. Fractals: Endlessly Repeated Geometric Figures. Princeton, NJ: Princeton University Press, pp. 9-10, 1991.
Weisstein, E. W. ``Bases.'' Mathematica notebook Bases.m.
- Significant Figures
- Signpost
- Signum
- Silver Constant
- Silverman Constant
- Silverman's Sequence
- Silver Mean
- Silver Ratio
- Similar
- Similarity Axis
- Similarity Dimension
- Similarity Point
- Similarity Transformation
- Similitude Center
- Similitude Ratio
- Simple Algebra
- Simple Continued Fraction
- Simple Curve
- Simple Graph
- Simple Group
- Simple Harmonic Motion
- Simple Harmonic Motion Quadratic Perturbation
- Simple Harmonic Oscillator
- Simple Interest
- Simple Polygon