Well, I've been running your code for about 6 hours or so on the fastest machine I have and also on an Ubuntu machine. Neither one has completed so far but they continue to compute.
As to the complete system crash my best guess is that your system has "thermal checked", i.e., overheated and thus powered off. My fast machine has all three fans running and is in a slight hover. Tim _______________________________________________ Axiom-developer mailing list Axiom-developer@nongnu.org http://lists.nongnu.org/mailman/listinfo/axiom-developer