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Lecture Notes for CSCI 243 - Discrete Structures of CSCI at William & Mary (W&M)

Notes Information

Material Type:Class Note
Professor:Staff
Class:CSCI 243 - Discrete Structures of CSCI
Subject:Computer Science
University:William and Mary
Term:--
Keywords:
  • Either...or
  • Consequence
  • Contrapositive
  • Conjunction
  • Proposition
  • Exclusive Or
  • Contradiction
  • Propositional
  • Possible Values
  • The President
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Sample Document Text

9/6/2002 1 CSci 243 Discrete Structures Lecture 5 Logic 1 9/6/2002 2 Outline . Introduction, Propositions . Compound Propositions .Truth Tables . Tautologies and Contradictions . Predicates and Quantification 9/6/2002 3 Introduction to Logic . Statements are either true or false . Some statements are very hard to evaluate . Ex: has no integral solutions for x, y, and z when n>2 . QC: , x=? y=? z=? . I have discovered a truly remarkable proof which this margin is too small to contain - Fermat nnn zyx =+ 222 zyx =+ 9/6/2002 4 Introduction to Logic (cont) .We can: . Abstract the details of a statement . Perform meaning-preserving translations to simplify . Maybe prove the argument invalid regardless of the details, or the truth of the details . Ex: Bob is drunk or he's sleepy and needs a rest A or B and C 9/6/2002 5 Propositions . Propositions: . My name is Maximillian. . 1+1=2 . Not propositions: .Helo! . Where is McGloughlin-S...

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