FA-99017 / Optimizer update state / Member archive
Frozen parameters accumulate optimizer state · case 02
Frozen parameters accumulate optimizer state.
Case contract
If inactive return [p,m,v]. Otherwise set nm=.5*m+.5*g, nv=.5*v+.5*g*g, and return [p-nm/(sqrt(nv)+1),nm,nv]; v is nonnegative.
Why this case matters
Optimizer implementations must associate each parameter with its own mathematically specified update state.
One recorded failure
Sample boundary fixtureThis sample comes from the broken implementation of a controlled reproducer.
| Boundary fixture | Actual | Expected | Outcome |
|---|---|---|---|
| frozen nonzero gradient | [3, 3.0, 11.0] | [3, 2, 6] | Failed |
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