04/21/2012, 05:04 PM

Hi

while trying to make a numerical method i stumbled upon a perhaps classical and/or old question :

" composition lemma "

f: R-> R

g: R->R

Let f [ g^(-1)[x] ] + g^(-1) [ f[x] ] = 2 g[x]

(?) ==> (?) g^(2) [x] = f [x]

regards

tommy1729

while trying to make a numerical method i stumbled upon a perhaps classical and/or old question :

" composition lemma "

f: R-> R

g: R->R

Let f [ g^(-1)[x] ] + g^(-1) [ f[x] ] = 2 g[x]

(?) ==> (?) g^(2) [x] = f [x]

regards

tommy1729