Let be a boolean formula constructed from the boolean input variables x 1 , x 2
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Let Φ be a boolean formula constructed from the boolean input variables x1, x2, . . . ,xk, negations (¬), ANDs (∧), ORs (∨), and parentheses. The formula Φ is a tautology if it evaluates to 1 for every assignment of 1 and 0 to the input variables. Define TAUTOLOGY as the language of boolean formulas that are tautologies. Show that TAUTOLOGY ∈ co-NP.
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Related Book For
Introduction to Algorithms
ISBN: 978-0262033848
3rd edition
Authors: Thomas H. Cormen, Charles E. Leiserson, Ronald L. Rivest
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