<div id="comment:0"></div> Implement an algorithm (according to a work of Gripenberg) to obtain some bounds for the joint spectral radius. CC: @slel Component: **linear algebra** Author: **Daniel Krenn** Branch/Commit: **[u/dkrenn/joint-spectral-radius](https://github.com/sagemath/sagetrac-mirror/tree/u/dkrenn/joint-spectral-radius) @ [`6bb4877`](https://github.com/sagemath/sagetrac-mirror/commit/6bb4877ff5c12ba4e77dd5382dcd1f607cab958a)** _Issue created by migration from https://trac.sagemath.org/ticket/21205_