2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/145032We present in detail a recent conjecture on self-adjoint representations of the Temperley-Lieb algebra for particular values on the unit circle. The formulation in terms of graphical calculus is emphasized and discussed for several examples. The role of PT (parity and time reversal) invariance is highlighted as it might prove important for generalising the construction to other cases.12 pages, 18 figures. Proceedings contribution for RAQUIS, Annecy, France, Sep 2007; revised version: some typos fixed and references addedMathematical PhysicsQuantum AlgebraExactly Solvable and Integrable Systemstext