LFIS–31: Nuclear Binding Structure from Cadence Closure

LFIS–31 develops the nuclear-binding and structural-closure architecture of the Light Frame Infrastructure Series. The volume applies the LFCT/LFIS contract, mode-balance, and saturation framework to nuclear-binding structure, including the iron-peak ceiling, doubly magic anchors, alpha-chain interpolation, geometric frustration, pre-scaffold behavior, and post-closure residual targets.

The paper organizes nuclear binding as a representational-closure problem rather than a fitted mass-formula replacement. It introduces a tiered structural account of how binding ceilings, shell anchors, operator-selection rules, and residual regimes arise from the LFIS mode and contract machinery. The volume also records named conditionals and open targets where further derivation or observational anchoring is still required.

LFIS–31 functions as both a nuclear-binding infrastructure volume and a cross-domain absorption volume. Its core derivation concerns nuclear-binding architecture through the LFIS spine, while later addenda connect that architecture to dual-edge structure, coherence-field interpretation, gravitational coupling analogies, neutron-star scale comparisons, and related downstream applications. The result is a public reference volume for the LFIS treatment of nuclear closure, binding structure, and the transition from local nuclear scaffolds to broader representational-boundary physics.