FORMVL. DIFFERENTIALIVM. KTp 



ex quo deducetur 



/<idy={l^)-^p(i^)-\-q{'^)+ctc. + TT, indeque 



fdxf(^dyziyi-\-fi:dx^ confequenter fiet K^fdxJQ^dy 

 ^fiidx, fiue ctiam 



KzzffQdxdy-^fdxffVdxdy-^-fdxfdxfl Ndxdj^ 

 At pro k' inueniendo habebimus 



-t-(j^)H-i*(^)^-?(rT) 



'^d X ' *^d »^ * ^d p 



^d p- 



-^iM^) 



etc 



Tf '^fvdx 



vnde prodit 



/Q:</.v = (l|)-l-/Af-|)-t-?'(i^')+etc. 



-1-5"(1|) 



•^/'^^ ((|f)-i-/''(^-v')+?'r;) _{. etc. ) 



hincque iterum 



fdyfC^dxzzK-^fizdy-^fdyfvdx 



^fdyfdx{{'^)-\^ p e^) -h etc.) 



=i>t-i-/7r^j+ f ^^ d X -^fdyfv dx 



•vnde colligitur 



^^^^ffQ^dxdy^-fmdy-fn^dx-^ffydxdy, 



Denique inuenietur 



K'"=ff(^'dxdy-f7:'dy. 



Tom.XV.Nou.Comm. Y aT 



