New posts in Group Representations

Matrix diagonalization in SU(2) and SO(3)

How can I tell that a Lagrangian has an $SU(2)\times SU(2)$ symmetry?

Is there a relation between spin and the spin group?

Lie groups with same algebra

Does there exist finite dimensional irreducible rep. of Poincare group where translations act nontrivially?

Poincare representations for interacting field theory

The anticommutator of $SU(N)$ generators

Why is the "actual" gauge group of the standard model $SU(3) \times SU(2) \times U(1) /N$?

Does the $\bf{1+3}$ representation of $SU(2)$ also represent $SU(2)\times SU(2)$?

What symmetry is responsible for the degeneracy of the free particle Hamiltonian?