[Maxima-bugs] [maxima:bugs] #4815 Matrix ordered incorrectly in sum

[David S. <tom...@us...>]

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**[bugs:#4815] Matrix ordered incorrectly in sum**

**Status:** open
**Group:** None
**Labels:** simplus matrix 
**Created:** Sun Jul 12, 2026 01:00 PM UTC by David Scherfgen
**Last Updated:** Sun Jul 12, 2026 01:00 PM UTC
**Owner:** nobody


~~~
(%i1) declare(v, nonscalar)$

(%i2) expr : v + matrix([1]);
(%o2) v + matrix([1])

(%i3) expr + matrix([1]);
(%o3) v + matrix([1]) + matrix([1])
~~~

The correct output for `(%o3)` is `v + matrix([2])`.


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