Stable Numerics Subroutine Library
Programming Reference Manual
Version 1.1 DD-00006-011

3.2 Circular Complex Interval Arithmetic KC

Circular complex arithmetic KC  consists of a complex number C  , acting as a center point and a real number R  acting as a radius of a circle in a two dimensional Cartesian space. As such any number that is within radius of the pivot is contained in the interval. The mathematical definition a complex circular interval X ∈KC  is as follows:

X ={a∈ C:(ℜ(a)- ℜ(xp))2+(ℑ(a)-ℑ(xp))2-k2r≤ 0}

Where xr∈{r∈ R:r≥ 0}≡xr∈ R+ as the radius of the circle and xp∈ C  as the center point in a two dimensional Cartesian coordinate system.

3.2.1 Singleton Interval
3.2.2 Empty Interval
3.2.3 Whole Interval
3.2.4 Normalized Interval