- #1
naima
Gold Member
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- 54
Hi PF
I try to understand how we get get a Taylor expansion of a non linear functional.
I found this good paper
here F maps functions to scalars. F[f] is defined. It has not scalars as arguments. I agree with A13 and A18.
In another paper (in french) skip to page 9
the fisrt term is ##\int dx P_0 (x)## and all the terms have one more variable.
Do you understand the second point of view? we did not start with densities.
I try to understand how we get get a Taylor expansion of a non linear functional.
I found this good paper
here F maps functions to scalars. F[f] is defined. It has not scalars as arguments. I agree with A13 and A18.
In another paper (in french) skip to page 9
the fisrt term is ##\int dx P_0 (x)## and all the terms have one more variable.
Do you understand the second point of view? we did not start with densities.