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- icalc - a complex-number expression parser
-
- by Martin W Scott
-
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- Technical notes
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- Principal value ranges
- ----------------------
-
- The PVRs are defined as follows:
-
- asin: if u + iv = asin(z), then
- -PI/2 <= u <= PI/2 if v >= 0
- -PI/2 < u < PI/2 if v < 0
-
- acos: if u + iv = acos(z), then
- 0 <= u <= PI if v >= 0
- 0 < u < PI if v < 0
-
- atan: if u + iv = atan(z), then
- -PI/2 < u < PI/2
-
-