K3 outcome (PREREG_estimated_transform, Linux run): the 6.6 claim stands. Corpus 4: A' 3656 vs Chandrupatla on sign(f)|f|^(1/m_hat) with the analogy order 3806 (A' 126/38/76, p=5e-4) and with Lagouanelle 7526; six corpora 13032 vs 15733 and 30991. On multiple/fractional roots the analogy order inside Chandrupatla closes 59%, 58%, 31% of the A'->oracle gap (CHA 322 vs 654, corpus 1 721 vs 1229, corpus 4 1766 vs 2159) and pays on simple roots (APS 3453 vs 2595); Lagouanelle on Chandrupatla's side-alternating triples reads a fractional order on 115 of 154 simple APS roots.

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simroot/transformed.py: Chandrupatla on G(f) with m_hat estimated in the run; bit-identical to chandrupatla with no estimate (test). Bug found and pinned by a test: |f|^(1/m_hat) overflowed with an OverflowError on the fractional branch; now inf and the step halves.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

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