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https://issues.apache.org/jira/browse/MATH-1083?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13855320#comment-13855320
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Sebb commented on MATH-1083:
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Others may say that 0/0 should be regarded as 1, because n/n == 1 for n != 0.
I don't think it makes sense to allow 0/0, as that is likely to cause all sorts
of odd results.
> Fraction - Allow zero denominator if numerator is also zero
> -----------------------------------------------------------
>
> Key: MATH-1083
> URL: https://issues.apache.org/jira/browse/MATH-1083
> Project: Commons Math
> Issue Type: Improvement
> Affects Versions: 3.1
> Reporter: Andrew Brampton
> Priority: Minor
> Labels: Fraction
>
> The Fraction constructor rejects a denominator of zero. However, while trying
> to parse some Strings generated by another program, I encountered a fraction
> "0/0". I would say that's ambiguous as to if that's valid, but some people
> would agree the answer is zero.
> So, would it be possible to allow a zero denominator if the numerator is also
> zero. I'd be happy to provide a patch.
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