Fri, 29 Dec 2006 17:24:49 +0100 replaced Sign.classes by Sign.all_classes (topologically sorted);
wenzelm [Fri, 29 Dec 2006 17:24:49 +0100] rev 21938
replaced Sign.classes by Sign.all_classes (topologically sorted); prefer structure Sign over Sorts; renamed Sorts.project to Sorts.subalgebra;
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