G2 is supported by BOBYQA bound constraints and COBYLA constraints. No unconstrained subclass is inferred solely from the Powell family name.
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Build record verified 2026-10-27.
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Bound-constrained smooth derivative-free optimization by quadratic models; COBYLA and other algorithms are separate. Dedicated G2h1a1 driver solves the shared box quadratic from three starts without providing derivatives. Known solution (1,0), objective 2, callback bounds and projected-gradient residual are checked. The API returns no status flag, so answer checks and nonexhausted 1000-call budget determine acceptance. General convergence is not inferred from normal return.