**TI83F* AppVariable file 03/22/07, 09:51¬ ›GLPA08›™nav AEC13267AEFC43F88E67E1C0E88B5B83GLPA08.GLPA081   empty setwempty set:ÖA set with no elements shown by the symbol { } or É. A solution set with no members. Also called a null set. identityCidentity:ÖAn equation that is true for every value of the variable.  inequalityZinequality:ÖAn open sentence that uses the symbolÖ<, , >, or  to compare two quantities.ø‚