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Unformatted text preview: c%ons • A func%on f(x1, x2,…,xn) is posi0ve in xi if and only if it is possible to write a sum of products expression for f in which xi’ does not appear • A func%on f(x1, x2,…,xn) is nega0ve in xi if and only if it is possible to write a sum of products expression for f in which xi does not appear Unate Func%ons • A func%on f is frontal or monotone increasing if and only if it is posi%ve in all of its variables • A func%on f is backal or monotone decreasing if and only if it is nega%ve in all of its variables • A func%on f is unate if and only if it is posi%ve or nega%ve in each of its variables • A Boolean expression is unate if...
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This note was uploaded on 11/07/2012 for the course ECE 462 taught by Professor Vasudevan,s during the Spring '08 term at University of Illinois, Urbana Champaign.
 Spring '08
 Vasudevan,S

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