Effective Archimedean Stark Theorems over Real Quadratic Fields: Quadratic Support, Shintani Transfer, and CM Descent

Paper and reproducibility archive for unconditional effective identifications of selected one-place archimedean Stark packets over real quadratic fields. The work develops a uniform quadratic-support theorem, an effective Shintani index-two transfer with certified height rigidity, and a cyclic-quartic CM norm bridge. The record contains the paper and supplement as directly previewable top-level PDF and TeX files, together with a self-checksumming companion archive of exact case data, Arb certificates, correction records, and compact proof-checking programs. Companion archive SHA-256: 79536ad9be167b3a18b499cd59dfd092ad03b29b8399b94a93ae709eaee29fe1.