and the constants 0 and 1 is called a language over these symbols and constants. Equations (1)–(7) show that, for any formula in the language over &, , , , , 0, and 1,
and the constants 0 and 1 is called a language over these symbols and constants. Equations (1)–(7) show that, for any formula in the language over &, , , , , 0, and 1,
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