Database System Concepts
Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
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QUESTION : Fill in the blanks in the following proof by induction of: No wff of PL begins with the string (→'. This is a proof by induction over The property P =. Proof: (i) (ii) Base case: No sentence letter of PL Inductive step: a. Inductive hypothesis (IH): Suppose that o and y are wffs that b. ~p: By the IH, _ c. (9→y): (9→v) does not begin with the string '(→', because. But prefixing o with ' cannot change this.
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Transcribed Image Text:QUESTION : Fill in the blanks in the following proof by induction of: No wff of PL begins with the string (→'. This is a proof by induction over The property P =. Proof: (i) (ii) Base case: No sentence letter of PL Inductive step: a. Inductive hypothesis (IH): Suppose that o and y are wffs that b. ~p: By the IH, _ c. (9→y): (9→v) does not begin with the string '(→', because. But prefixing o with ' cannot change this.
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