| Thu, 05 Nov 2015 08:27:14 +0100 | nipkow | Convertd to 3-way comparisons | file | diff | annotate |
| Mon, 02 Nov 2015 18:35:30 +0100 | nipkow | tuned names and optimized comparison order | file | diff | annotate |
| Tue, 13 Oct 2015 17:06:37 +0200 | nipkow | added invar empty | file | diff | annotate |