[
https://issues.apache.org/jira/browse/MATH-1269?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14739394#comment-14739394
]
Sebb commented on MATH-1269:
----------------------------
Note: I had a quick look at expm1() and that seems to naturally return infinity
when required without needing to check that the input is too large.
Unfortunately defining exp() in terms of expm1() does not retain sufficient
precision.
> FastMath.exp may return NaN for non-NaN arguments
> -------------------------------------------------
>
> Key: MATH-1269
> URL: https://issues.apache.org/jira/browse/MATH-1269
> Project: Commons Math
> Issue Type: Bug
> Affects Versions: 4.0
> Reporter: Otmar Ertl
> Attachments: MATH-1269.patch, MATH-1269.patch
>
>
> I have observed that FastMath.exp(709.8125) returns NaN. However, the
> exponential function must never return NaN (if the argument is not NaN). The
> result must always be non-negative or positive infinity.
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
