<div id="comment:0"></div> Why that ? Because : * Integer Vectors have no element class * Integer Vectors elements must be immutable and hashable * Clean the old code with new specification * Add documentation * Deal with coeherence beetween extra arguments of the constructor * ... CC: @sagetrac-sage-combinat @fchapoton @darijgr Component: **combinatorics** Keywords: **Integer, vectors, clone, Cernay2012** Author: **Travis Scrimshaw** Branch/Commit: **[`4aaba42`](https://github.com/sagemath/sagetrac-mirror/commit/4aaba4280940c4defae572c3e16fb213406bc613)** Reviewer: **Frédéric Chapoton, Nathann Cohen** _Issue created by migration from https://trac.sagemath.org/ticket/12453_