SFB-YM Boundary Note v0.9: Gap-like Readout Transition Boundary as a Pre-Bridge Structural-Audit Definition

SFB-YM Boundary Note v0.9 is a supplementary definition note to Gaasu SFB Theory v4.3. This note defines the “Gap-like Readout Transition Boundary” as a pre-bridge structural-audit definition for claim-audit use. It is a content-hardened supplementary definition note and issues both DOCX and PDF forms. At this stage, the definition is intentionally pre-bridge and domain-general. It is not presented as a Yang-Mills-specific mathematical construction, spectral theorem, Hamiltonian result, or physical mass-gap formulation. This record does not claim a solution to the Yang-Mills mass gap problem, mathematical proof, physical confirmation, experimental validation, external validation for SFB, peer review, institutional approval, formal verification, or cross-domain equivalence. Package boundary:- DOCX and PDF are issued in this step.- No SI package is issued.- No ZIP package is issued.- SHA256 identifies the frozen release-support file set.- Detached PGP signature files are included for the DOCX, PDF, INSTALL_ME, and RELEASE_TAG files. PGP provenance note:Detached PGP signature files are included for the following files: SFB_YM_Boundary_Note_v0_9.docx.sigSFB_YM_Boundary_Note_v0_9.pdf.sigSFB_YM_Boundary_Note_v0_9_INSTALL_ME.txt.sigSFB_YM_Boundary_Note_v0_9_RELEASE_TAG.txt.sig The SHA256 manifest is intentionally not PGP-signed in this release-support set, following the existing Gaasu release convention. Signature files are also intentionally not included inside SFB_YM_Boundary_Note_v0_9_SHA256.txt. PGP public key:Hisashi Suga / Gaasu13 active public key recordDOI: 10.5281/zenodo.20379422 Parent framework:This record is supplementary to Gaasu SFB Theory v4.3:DOI: 10.5281/zenodo.20823434 Governance lock:Peace / Non-violence / Dignity.NO military / NO surveillance / NO coercion.Audit-first / FACT-BASED / NO OVERCLAIM / NON-CIRCULARITY.