@misc{gfp_real_form_sp_4_r,
  author = {{Groups for Physics}},
  title = {sp(4, R) ≅ so(2,3)},
  howpublished = {Groups for Physics reference},
  url = {https://groups.qft.org/atlas/real-forms/sp-4-r/},
  version = {2026.11-workbench.4},
  note = {Research workbench IV; review status recorded on canonical page}
}