Expression 9: "d" Subscript, 1 , Baseline left parenthesis, "x" , "y" , right parenthesis equals absolute value left parenthesis, "x" , right parenthesis minus 1d1x,y=absx−1
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Expression 10: "d" Subscript, 2 , Baseline left parenthesis, "x" , "y" , right parenthesis equals absolute value left parenthesis, "y" , right parenthesis minus 2d2x,y=absy−2
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Expression 11: 0 equals "d" Subscript, 1 , Baseline left parenthesis, "x" , "y" , right parenthesis0=d1x,y
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Expression 12: 0 equals "d" Subscript, 2 , Baseline left parenthesis, "x" , "y" , right parenthesis0=d2x,y
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Expression 14: "p" left parenthesis, "x" , "k" , right parenthesis equals signum left parenthesis, "x" , right parenthesis times absolute value left parenthesis, "x" , right parenthesis Superscript, "k" , Baselinepx,k=signx·absxk