[Maxima-bugs] [maxima:bugs] Re: #4636 signum(ind) is an error

[Barton W. <wil...@us...>]

The current `signum(2.3) => 1.0` behavior comes from  a call to the bigfloat code:

~~~
 (maxima::to (bigfloat::signum (bigfloat::to x)))))
~~~

I'm not the right person to alter this code.


---

**[bugs:#4636] signum(ind) is an error**

**Status:** open
**Group:** None
**Labels:** extended real signum limit 
**Created:** Thu Nov 27, 2025 12:41 PM UTC by Barton Willis
**Last Updated:** Sat Nov 29, 2025 07:05 AM UTC
**Owner:** nobody


Either a  `signum` nounform or `ind` is a better result than an error:
~~~
(%i4)	signum(ind);
sign: sign of ind is undefined.
~~~
Should the general simplifier, or the one‑argument limit function, handle` F(extended-real)`? We’ve discussed this—do we have a consensus?



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