I have watched that in physics or string theory perturbation is used..but could we obtain a unifying theory of physics using canonical theory?..i mean take the Lagrangian take the hamiltonian and quantizy the moment Pab by introducing functional derivatives..
I am nearly certain that it has been suggested that three of the four now thought to be fundamental causes of motion have been unified. Excluding gravity, these are : the weak force, the strong force and electromagnetism. Can someone please explain to me what indicates or how it was shown that...