Stable Numerics Subroutine Library
Programming Reference Manual
Version 1.2 DD-00006-012

3.3 Rectangular Complex Interval Arithmetic RC

Rectangular complex arithmetic RC consists of two intervals IR representing the real ℜ and imaginary ℑ component of a complex number C. Geometrically a rectangular complex interval is a box in Cartesian two-dimensional space. Given a rectangular complex interval k ∈RC where the extraction operators ℜi(k),ℑi(k)∈ IR are used to extract the real and imaginary components a rectangular complex consists of a set of all complex numbers v∈ C that uphold:

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RC= {(ℜi(k)≤ℜ(v)≤ ℜi(k)∧ (ℑi(k)≤ℑ(v)≤ ℑi(k)}
3.3.1 Singleton Interval
3.3.2 Empty Interval
3.3.3 Whole Interval