表达式7: "H" left parenthesis, "x" , "y" , right parenthesis equals StartFraction, "L" left parenthesis, "x" , "y" , right parenthesis Over "F" left parenthesis, "L" left parenthesis, "x" , "y" , right parenthesis , right parenthesis , EndFraction times left bracket, negative 1 , negative 1 plus StartFraction, 2 Over "N" , EndFraction , ... , 1 , right bracket left brace, max left parenthesis, abs left parenthesis, "x" , right parenthesis , abs left parenthesis, "y" , right parenthesis , right parenthesis less than or equal to 1 , right braceHx,y=Lx,yFLx,y·−1,−1+2N,...,1maxabsx,absy≤1
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表达式8: "L" left parenthesis, "x" , "y" , right parenthesis equals StartRoot, "x" squared plus "y" squared , EndRootLx,y=x2+y2
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表达式9: "y" equals "H" left parenthesis, "x" , "y" , right parenthesisy=Hx,y
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表达式10: "x" equals "H" left parenthesis, "x" , "y" , right parenthesisx=Hx,y
