Excluded in the stated class
The fixed marked M4 channel has no homogeneous GKSL logarithm for any positive integer power
finding:marked-m4-channel-all-powers-homogeneous-gksl-excluded
For Phi(X)=7X/12+sum_{j=1}^5 Gamma_j X Gamma_j/12 on M4 with the specified Clifford matrices and 1+5+10 spectral blocks, no Phi^n for positive integer n is the exponential of a time-homogeneous GKSL generator on the same M4. The proof covers all logarithm branches using block traces and Clifford twirling; the forced canonical coefficient beta=n log(3/4)/16 is negative. This is a different channel from the shared S3 register hierarchy.
Scope: Only the specified M4 endpoint channel, positive integer powers, same system and homogeneous GKSL time. Intermediate covariance is not assumed. Positive GNS Hilbert transfer and classical B recovery semigroup remain valid; larger systems and time-dependent dynamics are not excluded. Contract remains PARTIAL and physical source derivation open; source review is not a fresh kernel/numerical run.
Required premises and original source excerpts
- Fixed marked M4 Clifford channel
Five specified Hermitian Gamma_j on M4 satisfy {Gamma_i,Gamma_j}=2delta_ij I. The endpoint is Phi=7id/12+sum_j Ad(Gamma_j)/12 with spectrum 1,1/3,2/3 on orthogonal blocks 1,5,10. Comparison class is any homogeneous GKSL generator on the same M4 with exp(L)=Phi^n for positive integer n.
premise:specified-marked-m4-clifford-channel
- experiments/theory-contracts/source-continuous-marked-time-search-20260922/PROOF.md, lines 15–53
Source SHA256: 62fd2844ecc3e84134d1400335cf4dd469312305d6cfb3eae427aba01beb0ac8
bounded-excerpt · current-at-snapshot
- experiments/theory-contracts/source-continuous-marked-time-search-20260922/PROOF.md, lines 65–132
Source SHA256: 62fd2844ecc3e84134d1400335cf4dd469312305d6cfb3eae427aba01beb0ac8
bounded-excerpt · current-at-snapshot
- experiments/theory-contracts/source-continuous-marked-time-search-20260922/PROOF.md, lines 164–188
Source SHA256: 62fd2844ecc3e84134d1400335cf4dd469312305d6cfb3eae427aba01beb0ac8
bounded-excerpt · current-at-snapshot