New posts in Poincare Symmetry

What is CPT, really?

As $SL(2,\mathbb{C})$ is a double cover of the Lorentz group, is $SL(2,\mathbb{Z})$ a discrete subgroup of the Lorentz group?

Poincare transformations and "three kinds of infinitesimal variations"

Lie group compactness from generators

Unitary irreducible representations of the little group $SO(3)$

Inonu-Wigner Group Contraction

Poincare invariance of Dirichlet and Neumann boundary conditions

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

Poincare representations for interacting field theory

In what sense is BMS a symmetry? (What is kept invariant?)