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Inconsistency in handling division by zero

Ash il y a 9 ans • mis à jour par Pavel Holoborodko il y a 9 ans • 2

Using double precision:

>> 1/0

ans =

Inf

And :

>> 0^(-1)

ans =
Inf

The results should be consistent using either method as shown above. However, using quad precision, these computations do not give consistent results:

>> 1/mp(0)

ans =
Inf
>> mp(0)^(-1)
ans =
Inf - NaNi

I'm not sure what's under the hood, but it seems to me that either computation should give the same answer.

À l'étude
Pavel Holoborodko il y a 9 ans

In power function we handle inputs like complex numbers by default. Semantic for various singular cases in complex arithmetic is not defined uniformly and implementation dependent (e.g. see here: http://www.advanpix.com/2015/10/19/devnotes-1-multiplicative-operations-with-complex-infinity/)


That is the reason for such misbehavior. We will fix this today.


Thank you for reporting the issue

Corrigé
Pavel Holoborodko il y a 9 ans

This bug has been resolved in Windows version. You can download it from our website.

GNU Linux & Mac OSX will follow today.

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