FORMA BINARIA DE!. SEST'ORDINE 321 



{n),. = aj V - l if, /), (xy) - ^(A ly {xyY 



= aj h «, 1, - l (/-, 0, (x y) + ^ {f, ly {xy)\ 

 (P)^, = aJa,ì;-l{f,J)^,{xy)-'^^{f,ì)^^xyr 



= aJì^.a;ì, + l{f,ì),,{xy)-^.{f,J)^^xyy, 



{f1),,= a_,.'a;ì/-{f.ì\,{xy)-".{f,ìy^,{xyy 

 = aj 1^ a/ /y + ^ (/; /)-, , {x yy . 



Ordini 8, 2. 



{h,ì)^={hì)h_^:'ì^-l{h,jy{xy) = ihì)hjì,h^-]-^^{jijy{xy), 



{hj),,= {hl)hjh^ì^-l{h,iy,{xy) = {hl)hjl^h^' + \{h,iy,{xy), 



Ordini 10, 2. 

 Ordini 12, 2. 



