Expression 5: "y" Subscript, 1 , Baseline tilde 1 minus "S" left parenthesis, "x" Subscript, 1 , Baseline . "x" squared plus "x" Subscript, 1 , Baseline . "y" squared plus "a" , right parenthesisy1~1−Sx1.x2+x1.y2+a
5
Expression 6: "S" left parenthesis, "x" , right parenthesis equals left brace, "x" greater than or equal to 0 : 1 , 0 , right braceSx=x≥0:1,0