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+2012-02-15 Gabriel Dos Reis <gdr@cs.tamu.edu>
+
+ * algebra/catdef.spad.pamphlet (Ring): Extends SemiRing.
+ (Dioid): New. Extend OrderedAbelianMonoid and SemiRing.
+ * algebra/exposed.lsp.pamphlet: Expose Dioid.
+
2012-02-13 Gabriel Dos Reis <gdr@cs.tamu.edu>
* interp/g-util.boot (stripTags): Rename from stripUnionTags.