206 



J. A. Grunert. 

 XV. 



V, — r,/ 



) — r, 

 r, £ 



Vr — r,/ 



Zweite Classe. 



I. 



/• .4 + .</ /? + Ä r + ö = 0, 



/■, .4 + g,B + h,C + D = 0. 

 II. 



[BC]=BUi- 

 [CA] = C(f 



III. 



/'0-.4(A-Ä,)- 

 IV. 



A [BC] + ^ [CA] + C[^i?] = 0. 



V. 



[ABf + [Z?C]= + [CAf 

 = ^'|(<^_^,y + (A_/,,y}_2Jfi(/--A)C</-,</0 

 + ^' { (f- fif + (/' -/'.)'!- 2 ÄC(<7 - ^,) (A - //.) 

 + CMC/-- /.)' + (^-^0^1 -2 (7^(A-//.) (/•- /•.) 



= ^M(/' r.r + (5'- //.y + (/'-/'.)M -^^r- /•.)'- 2 ^Ä (/■-/■.) (^-.v.) 



+ B'-{(f-0 + (ff- ffd' + (/'-/hfl- B\ff-ff,y-2BC(g-g,} (/>-/,,) 



+ cmf~0 + (.9-^,)' + ih-/>,y}-c-ih-h,y-2CA(h-/,o (f-fo 



