- #1

ATY

- 34

- 1

So, I found http://www.ss.ncu.edu.tw/~lyu/lecture_files_en/lyu_NSSP_Notes/Lyu_NSSP_AppendixC.pdf

this derivation. Maybe you have a clue what tehy are doing in C.54.

So before this they are calculating the taylor expansion series of [tex]f_1,f_2,f_3,f_4[/tex]. This makes somehow sense. But I get confused when they throw everything together in equation C.54.

Why is therre just the "ordinary" f everywhere instead of [tex] f_2,f_3,f_4 [/tex] ? I thougt that they just insert everything into equation C.46, but this seems not to be the case, or they are skipping some steps (like getting f_4 back to f_1 or so...)

I hope that somebody takes a look at the derivation and can tell me what exactly they are doing there