수식 3: "z" equals "f" left parenthesis, left parenthesis, "x" , 0 , right parenthesis , right parenthesis . "x" left brace, "y" equals 0 , right bracez=fx,0.xy=0
3
수식 4: "N" Subscript, "i" , Baseline equals left parenthesis, 0 , left bracket, 1 , negative 1 , right bracket , right parenthesisNi=0,1,−1
4
수식 5: "N" equals left parenthesis, left bracket, 2 , negative 2 , right bracket , 0 , right parenthesisN=2,−2,0
5
Helferlein (Multiplikation und Betrag komplexer Zahlen)
