3.1.1 Singleton Interval
3.1.2 Empty Interval
3.1.3 Sign of an Interval
3.1.4 Bounded and Whole Interval
3.1.5 Normalized Interval
3.2 Circular Complex Interval Arithmetic
3.2.1 Singleton Interval
3.2.2 Empty Interval
3.2.3 Whole Interval
3.2.4 Normalized Interval
3.3 Rectangular Complex Interval Arithmetic
3.3.1 Singleton Interval
3.3.2 Empty Interval
3.3.3 Whole Interval
3.4 Kaucher Interval Arithmetic
3.4.1 Empty Interval
3.5 Real Triplex Arithmetic
3.5.1 Empty Triplex