FA-99008 / Optimizer update state / Member archive
Decoupled decay contaminates gradient moments · case 03
Decoupled decay contaminates gradient moments.
Case contract
For zero prior state return [p*(1-lr*wd)-lr*g,g,g*g].
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 |
|---|---|---|---|
| decay only | [3.5, 1.0, 1.0] | [3.5, 0, 0] | Failed |
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