<div id="comment:0"></div> part of #14329, and sequel of #15076 and #15098 Component: **linear algebra** Author: **Frédéric Chapoton** Branch/Commit: **[`98a2153`](https://github.com/sagemath/sagetrac-mirror/commit/98a2153ae36a6e1abf1f0fb337ec66421fcc11ca)** Reviewer: **Marc Mezzarobba** _Issue created by migration from https://trac.sagemath.org/ticket/15333_