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Fix power precedence and bounded refusals in MathGate - #1
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MathGate previously evaluated
-2^2as4, associated chained powers incorrectly, and could raise instead of returning a refusal for large factorials or deeply nested input. This change applies conventional power precedence and returns sealed refusals for documented computation, output-size and parsing limits.The public 240-case corpus is unchanged: 192 exact answers and 48 expected refusals, with zero failures or certificate drift. Eighteen unit tests pass, including new regressions for the discovered failures. The README now identifies this corpus as a public development suite rather than an independent evaluation.
Validation:
python -m unittest discover -s tests,python -m mathgate --bench, demo, andgit diff --checkpassed. AI-assisted implementation and review.