FA-12033 / Optimization solver contracts / Member archive
Coordinate descent sweep reads stale coordinates · case 03
Coordinate descent sweep reads stale coordinates.
Case contract
For f=(x-a)^2+(y-b)^2+(x-y)^2 perform one exact x-then-y sweep; return [x,y].
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 |
|---|---|---|---|
| coupling | [6.0, 0.0] | [6, 3] | Failed |
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