<div id="comment:0"></div> ``` sage: x = var('x', domain='real') sage: conjugate(x+I) x + I sage: conjugate(x)+conjugate(I) x - I ``` (tested on top of #23134) Reported recently in ask.sagemath, [a problem with variables in real domains](https://ask.sagemath.org/question/37766/a-problem-with-variables-in-real-domains/) Depends on #23325 CC: @rwst Component: **symbolics** Keywords: **assumptions, complex numbers** Author: **Ralf Stephan** Branch/Commit: **[`8cef176`](https://github.com/sagemath/sagetrac-mirror/commit/8cef17614aefcdbd928915e2b39c5111acfa9a3d)** Reviewer: **Marcelo Forets** _Issue created by migration from https://trac.sagemath.org/ticket/23135_