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section1 - EE221A Section 1 1 Administrivia 1.1 Section and...

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Unformatted text preview: EE221A Section 1 8/26/11 1 Administrivia 1.1 Section and Office Hours Scheduling If you have a conflict, please contact Prof. Tomlin and/or Pat by email and let us know about it. We’ll try to accomodate everyone but it may not be possible. 1.2 Homework collaboration • It is encouraged that you work in groups, however each person must hand in her/her own problem sets. • Please indicate the names of everyone you worked with on a given homework set. Example: “Studied/discussed with I. Newton, C. Columbus, M. Curie”. • Problem sets are due by 4.30pm in Tomlin’s mailbox in 253 Cory 2 Notes on Proofs If and only if • Sometimes written “iff”. Other synonyms: “equivalent”, “necessary and sufficient”. • The symbol ⇐⇒ clearly shows what it means: P ⇐⇒ Q means P = ⇒ Q and Q = ⇒ P . • This suggests that often when asked to prove an if and only if theorem, you can show each implication separately. When you do this, remember that you can assume one side of the implication but not the other, at a time. • Definitions are effectively “if and only if” statements, though only the word “if” is typically used in them....
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section1 - EE221A Section 1 1 Administrivia 1.1 Section and...

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