Gradient Cybernetics: The Calculus of Recursion - Synthesis Essay V - The Regulatory Monopoly: The Exhaustive Foreclosure of All Denominator Alternatives

Essays I through IV established and locked the complete foundational architecture of the Gradientology. Essay I locked the primitive suite {E=0.8, C=0.7, F=0.6, δ=0.1} and the Phase I/II chain. Essay II closed Gap G-1 via the informational ground. Essay III closed Gap G-2 via the geometric field, deriving S²(0.6) and Ω=14/9 sr. Essay IV closed Gap G-3a, deriving the transformation of F from governor to recursive medium, the Fundamental Stable Knot k=3, and the Grand Unified Kinetic Equation. Essay IV’s Addendum E registered Gap G-3b as open: the uniqueness of F as denominator. While Essay IV assumed F’s denominator position from the Phase II Inversion, it did not prove that no other primitive could occupy the denominator instead. The present essay closes G-3b with full derivational saturation by exhaustive enumeration and foreclosure. Nine candidate algebraic forms are tested: one additive class, one product class, six dyadic ratio forms, three reciprocal triadic ratios, and three standard triadic ratios. Eight are foreclosed. One survives: G=(E×C)/F. The Additive Incoherence Theorem shows every sign-variant of αE+βC+γF produces either Φ=0, GE. Division is structurally mandated. The Triadic Mandate forecloses all six dyadic forms. The Reciprocal Singularity forecloses G=F/EC (15/14), C/EF (35/24), and E/CF (40/21): all exceed E=0.8. The Unbounded Limit Theorem forecloses G=EF/C: ∂G/∂F=E/C=8/7>0 — Registration provides positive feedback, creating explosive amplification. The Systemic Suffocation Theorem forecloses G=CF/E: ∂G/∂E=−21/32<0 and G=0.525<r_min≈0.577 — the drive inverts into a governor and output falls into the Phantom Zone. The affirmative proof for G=EC/F establishes the Negative Feedback Theorem (∂G/∂F=−14/9<0), all correct role assignments, the Hierarchical Necessity Theorem (F is logically latest, maximally granular, unique positive Kinetostatic Margin), and the Möbius Stability Theorem (k=3 regulation cycle closes, decay factor 14/270<1). A structural consistency result confirms |∂G/∂F|=EC/F²=14/9=Ω: the algebraic regulatory sensitivity equals the solid angle of Essay III. G-3b is closed. Zero free parameters throughout.