Good afternoon : I now what I've written here : https://www.physicsforums.com/showthread.php?t=763322 in the first message. I've made the Clebsh Cordon theorem with the components. Which can be represented by the Young tableau. There also the [tex]SU(3)[/tex] and the [tex]su(3)[/tex] representation of dimension 3. The base represent the quarks. I know nothing on the quarks. Just that each quarks is represent by a vector of a base. The anti quarks are in the conjugued representation. What is the link with what I said here and here https://www.physicsforums.com/showthread.php?t=763322 in the first message and the quantum field theory please? I wanna know now who to make Physiks with this. How this represnetation of [tex]SO(3)[/tex], [tex]SU(2)[/tex] and [tex]SU(3)[/tex] and their Lie algebra intervene in the Quantum Field Theory please? This space matrix are group. What is a gauge please? Thank you in advance and have a nice afternoon.