We prove a new inter-weight identity β₃−42β₅+315β₇=0 for the rational kernel of Ramanujan's formula for ζ(2m+1), arising from cyclotomic factorization. A Cyclotomic Block Theorem determines ℚ-linear independence across weights. A reduction operator via Fermat-quotient chains isolates cyclotomic factors and shows chronic underdetermination: ζ(s) cannot be isolated over ℚ. This demarcates reductive vs. additive Diophantine operators, explaining structural limits of modular-Lambert methods. Three obstruction results close spectral approaches.
Ricardo Hernandez Reveles (Sun,) studied this question.
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