The Universal Constant ΩT = 13,1

We rigorously define the universal log-periodic constant ΩT =13,1±0,5 rad · ln−1, called the Taburet constant. This constant setsthe universal spacing of oscillations cos ΩlnX + ϕ across a widerange of cosmological and gravitational observables whenever theyare governed by a discrete scale invariance. It emerges in TD3Rfrom a minimal tri-phasic closure: three identical scale steps (ratioλ ≃ 1,174) close the global cycle with a factorΛ = λ3 ≃ 1,618.