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Simple Sets and Indexing - Home - AMPLAMPL
ampl.comSIMPLE SETS AND INDEXING CHAPTER 5. entity — such as raw materials, products, factories or cities. Often the strings are chosen to have recognizable meanings (coils, FISH, New_York), but they could just as well be codes known only to the modeler (23RPFG, 486/33C). A literal string that appears in …