docs: sync division dispatch docs with Newton balanced band (PR #79)#80
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Update all division-dispatch documentation to match the current dispatcher and record the PR #79 findings: - CLAUDE.md: replace the stale Newton-band description (b≥24576/16384 — never matched the code) with the actual three bands (3/1@4096, new 2/1@98304, 8/1@2048) plus the BZ non-power-of-2 blowup rationale and the ratio∈(1,2) residual. - docs/DIVISION.md: add NEWTON_BALANCED_* to the dispatch diagram, threshold table, and pseudocode; document the single-block 2n boundary fix and the BZ non-pow2 blowup; note the residual. - BENCHMARK.md: headline summary + dispatch-validity table row for the balanced band. - README.md: division one-liner now covers near-balanced ratio≥2. - division_improvement_plan.md: new completed section 3b describing both fixes, measured speedups, and the ratio∈(1,2) next step. Docs only; no code change. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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Doc-only follow-up to #79. Brings all division-dispatch documentation in line with the current dispatcher and records the findings.
b≥24576/16384, which never matched the code) with the actual three bands (3/1@4096, new2/1@98304,8/1@2048), the BZ non-power-of-2 blowup rationale, and theratio∈(1,2)residual.NEWTON_BALANCED_*to the dispatch flowchart, threshold table, and pseudocode; documents the single-block2nboundary fix and the BZ non-pow2 blowup; notes the residual.ratio∈(1,2)next step).No code change.
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