{ "schema": "bethe-six-spinon-native-comparison-v1", "scope": "Exact small three-frequency tutorial query, native64/113 versus MPFR128/192. Arithmetic stability only; no sampling or omitted-domain convergence claim.", "source": "0b496a020694b0c15398c5bae8738d73114e23d4", "uni20": "1cb2474eb0a54e13ec7d5f2c1823752020b2425c", "binary_sha256": "28264ce4409a7e3cdd5a6f26195b9a00cb7ac6fc5214e6f0c8f855663796854e", "hardware": "12th Gen Intel(R) Core(TM) i7-12700KF", "workers": 2, "selection": "Default tutorial seed42 plus both failing seeds2and35 from the retained ascending1--40 long-double scan. No failed seed is replaced.", "reference_sources": "Seeds42and2 reuse the retained MPFR192 exports at b573fb4. The successful numerical kernels are unchanged; intermediate-native selection and failure reporting differ. Seed35 has a fresh MPFR192 reference at the same0b496a0source.", "timing_scope": "Native costs are external complete-process CPU/wall including setup and export; internal application times remain in each compact summary.", "cases": [ { "seed": 42, "native": { "schema": "bethe-six-spinon-slice-v1", "density_convention": "S(q,w); moments use dw/(2*pi); raising=2*zz", "momentum": "1.57079632679489661923132169163975", "exchange": "1", "rapidity_cutoff": "8", "frequencies": [ "1.8", "2", "2.2" ], "runs": [ { "raw_sha256": "c1325862d97465dc3c9c5c180e95f05164507f3cd2db59091845c5485b3fb607", "metadata": { "Arithmetic format": "binary128", "Bethe revision": "0b496a020694b0c15398c5bae8738d73114e23d4", "Bethe version": "0.1.0", "Build type": "Release", "CPU timing scope": "spectral grid including geometry and ordered output", "Channel": "zz", "Compiler": "GNU 13.3.0", "Date": "2026-10-31T12:58:58Z", "Density absolute tolerance": "0", "Density comparison bits": "64", "Density convention": "S(q,w); 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