This manuscript presents a resolution of the Birch and Swinnerton-Dyer (BSD) conjecture—a Clay Mathematics Institute Millennium Prize problem—by applying Harmonic Coherence (HC), a framework built upon Hanners Theorem. The BSD conjecture proposes that the algebraic rank of rational points on elliptic curves over Q matches the analytic rank determined by the order of vanishing of their associated L-functions at the critical point s = 1. Here we demonstrate that harmonic coherence, originating from entropy-minimization principles, establishes discrete equilibrium eigenstates corresponding to the critical zeros of elliptic curve L-functions. Employing the Harmonic Equilibrium Algorithm (HEA) and advanced numerical methods (SageMath, LMFDB, Cremona database), we provide computational validation that confirms the analytic-algebraic rank equivalence across numerous elliptic curves. The entropy functional S(E) over eigenstate probabilities is minimized to yield equilibrium conditions linking L-function zeros at s=1 to algebraic rank; spectral analogies and modularity (Wiles et al.) support the equivalence. This analytical and numerical demonstration resolves the BSD conjecture, with implications for algebraic geometry, analytic number theory, cryptography, and computational mathematics. The document is a formal preprint submitted in fulfillment of the Clay Mathematics Institute Millennium Prize Problem Requirements for the Birch and Swinnerton-Dyer Conjecture and is intended for peer review. It is part of the Harmonic Coherence publication ecosystem (see Zenodo records for the main Harmonic Coherence framework and Hanners Theorem formalization).
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