GAP 4.8.9 installation with standard packages -- copy to your CoCalc project to get it
3 extreme rays 3 support hyperplanes embedding dimension = 3 rank = 3 (maximal) *********************************************************************** 3 extreme rays: -1 -1 3 1 -2 4 1 1 2 3 support hyperplanes: -8 2 3 1 -1 0 2 7 3