Hello Nils, thank you for your analysis!

You wrote:

> It should really be no surprise that inequalities don't play nice with 
> "domain: complex"
>

Hm. "domain : complex" is set both in maxima_lib.py and maxima.py. Which 
one is responsible here?
It has been in there "forever" (I followed it back to commit 0daf6b in 
2009.) and I assume it is necessary for many Maxima calls.

Now I have two questions:

* How can Maxima be called without "domain : complex" as a workaround?
The following does not work, it still gives the "!= 0" terms:

maxima.eval("domain : real;")
solve(abs((x-1)/(x-5)) <= 1/3, x)

* What would happen if Maxima were called with the default "domain : real"?

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