Excluded in the stated class
Sign projector does not determine energy magnitudes
finding:sign-projector-does-not-determine-time-magnitude
For C=(I+sgn H)/2, H_a=diag(1,a,-1,-a), a>0, gives the same fixed projector C and rho_0 but different positive energies. Thus [rho,C]=0⇒[rho,H]=0 is false without an extra premise. The counterexample concerns only inference from state/sign covariance to complete dynamics.
Scope: Exact finite-dimensional counterexample for zero-temperature sign projection; refutes neither modular uniqueness for a fixed standard pair nor a complete TFPT source derivation.
Required premises and original source excerpts
- Only sign covariance is given
The conditional counterexample assumes C=(I+sgn H)/2 and [rho,C]=0, without knowing positive magnitude |H| or a complete transfer.
premise:sign-covariance-only
- experiments/theory-contracts/seam-state-dynamics-injectivity-20260918/README.md, lines 11–48
Source SHA256: 9b3d02af286051e4476b2bf079ae01abd97fe5634a10728521b09e8739c02e91
bounded-excerpt · current-at-snapshot