- #1

eljose79

- 214

- 1

then suppose we perturbe the initial equation A with another differential operator B(y,y´) which lie group is B.and we form the operator C(y,y´)=A(y,y´)+eB(y,y´) where e<<1 then...

what would be the lie group of simmetries for C?...

could it be obtained by perturbation theory?..