,ft2 Pfaff 



ubi nunc ex dcnominatore tä Ja prodeunt denominatores Ti3r dcj de; db, 

 poncndo A pio» Cj Ej B, f " !>,i — ' I .' 



' ' * 'Transesintis ninic ad aeqnnttionpöi inter sex raviajjiles banc; 

 o == Ada + Bdb-i-Cdc + Ede+Fdf+Gdg, 



ex snpta $, 8- demonstv«li4- sponle sequilur aeqnatio auxiliaiüs iiiLer db 



et de Iiaec: 



■ <: '■' Sh -^^^ i(A CE-)': ^ lAiFT^r — (A C F> . f.^ E G) + (A€-G) . (A E F; 

 dg "~ (ABC; . (AEF)— CABE;.(ACF^ + C^BF). (ACE^" 



db ,- *'^^''' 



(ACEXAFG) — (ACF)(AEG) + (ACG)rAEl") 



4. -^g 



^ (AGE)(AFB)— (,ACF}.(ÄEB) + (ACB)(AEF) 

 Fermulando invicem a et-b, A et,B, fit 



da 

 (B C E) (B F G) — (,B C F) ^B E G) -f (B C G) (B E F) 



. . ■■-Ü!-^: dg- -■'- .- JV:- 



• (BCE)(BFA) — (BCF,(BEA)4-(BCA)(BEF) 



Pei"innta»dohic invicem c et g, C etG, fit 



/ ; " : da^ ...,-, " 



sive o 



/ 4- 



(B A E) ,B F G) — (B A Fj (B E G) -f- (.B AG, (B E F; 



Sin-.Ili modo aequalio iiiter da, de; et da, df reperilur. Quare hae qua- 

 tiior arquatjones auxiliares ptd^ünl: 



■ . da 



,) o = ) (BCE, (BFG; — (BCf) eil EG; + (BCG", (BEF) 



+ 7 ' ''■ 



(BAE)CBFG) — (BAF;(BEG) + (iJAG)(BEF; 



