Theta Cubic Source Lies on the Low-Reserve Positive-Flux Branch
Stable evaluations of the four fixed completed-theta moments give
while
Thus the source lies on the low-reserve branch, where cubic coherence requires positive translated Mellin-variance flux. Global completion reverses the negative sign predicted by the local seam-pinned exponential model.
The monotone-barrier margin is approximately
stable from 3,000 through 24,000 Simpson panels. This is reconnaissance, not an interval proof. The next step is a directed enclosure of using positive quadrature and a super-exponential tail bound.
Artifact:
research/grothendieck/theta-cubic-source-lies-on-the-low-reserve-positive-flux-branch.md