Expression 1: Phi left parenthesis, "x" , right parenthesis equals "x" minus floor left parenthesis, "x" , right parenthesisΦx=x−floorx
1
Expression 2: 1 minus Start product from "n" equals 0 to 3, end product, left parenthesis, sign left parenthesis, left parenthesis, max left parenthesis, StartAbsoluteValue, Phi left parenthesis, 3 Superscript, "n" , Baseline left parenthesis, "x" minus .5 , right parenthesis , right parenthesis minus .5 , EndAbsoluteValue , StartAbsoluteValue, Phi left parenthesis, 3 Superscript, "n" , Baseline left parenthesis, "y" minus .5 , right parenthesis , right parenthesis minus .5 , EndAbsoluteValue , right parenthesis minus 1 sixth , right parenthesis , right parenthesis plus 0 , right parenthesis greater than or equal to 0 left brace, negative .5 less than "x" less than .5 , right brace left brace, negative .5 less than "y" less than .5 , right brace Has graph.1−3∏n=0signmaxΦ3nx−.5−.5,Φ3ny−.5−.5−16+0≥0−.5<x<.5−.5<y<.5
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