FA-12022 / Optimization solver contracts / Member archive
Trust region accepts steps with a nondecreasing model · case 02
Trust region accepts steps with a nondecreasing model.
Case contract
Accept iff predicted>0 and actual/predicted>=eta, for 0<eta<1; reductions use old-new convention.
Why this case matters
This deterministic solver-step model isolates an algorithmic invariant used by iterative optimization implementations.
One recorded failure
Sample boundary fixtureThis sample comes from the broken implementation of a controlled reproducer.
| Boundary fixture | Actual | Expected | Outcome |
|---|---|---|---|
| model increase | true | false | Failed |
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