Lecture 19(Friday) - Part 1

# Lecture 19(Friday) - Part 1 - using uniqueness Suppose you...

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Unformatted text preview: using uniqueness Suppose you have a predicate of the natural numbers: Is S (3 3) true? How do you prove that? It's useful to check out the remainder theorem from the sheet of mathematical prerequisites. Vn P N S (n) D Wk P N; n = 7k + 3 slide 4 getting wrong right Be careful proving a claim false. Consider the claim, for some suitably de ned X; Y and P; Q: S : Vx P X; Vy P Y; P (x; y) A Q(x; y) To disprove S , should you prove: Vx P X; Vy P Y; P (x; y) A XQ(x; y) What about Vx P X; Vy P Y; X (P (x; y) A Q(x; y)) Explain why, or why not. slide 5 ...
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## This note was uploaded on 10/13/2011 for the course COMPUTER S CSC 165 taught by Professor Dannyheap during the Fall '10 term at University of Toronto.

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Lecture 19(Friday) - Part 1 - using uniqueness Suppose you...

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