[Python-bugs-list] [ python-Bugs-409448 ] Complex division is braindead

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Bugs item #409448, was updated on 2001-03-17 13:45
You can respond by visiting: 
http://sourceforge.net/tracker/?func=detail&atid=105470&aid=409448&group_id=5470

Category: Python Interpreter Core
Group: None
Status: Open
Priority: 5
Submitted By: Tim Peters (tim_one)
Assigned to: Tim Peters (tim_one)
Summary: Complex division is braindead

Initial Comment:
>>> x = complex(1e200, 1e200)
>>> x/x
0j
>>> x = complex(1e-200, 1e-200)
>>> x/x
(1.#INF-1.#INDj)
>>> 

This is nothing new; it's always been this way; the 
algorithm we use is numerically naive, ignoring the 
possibility for overflow and underflow in internal 
intermediate results.  The results will vary across 
platforms in such cases, in unpredictable ways (the 
above was run on a WinTel box).


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http://sourceforge.net/tracker/?func=detail&atid=105470&aid=409448&group_id=5470