FA-98937 / Gradient accumulation weighting / Member archive
Microbatch gradients are summed when the objective expects their mean · case 02
Microbatch gradients are summed when the objective expects their mean.
Case contract
Each input is one already-normalized microbatch gradient. Return the arithmetic mean over updates; no updates yields zero.
Why this case matters
A deterministic toy model isolates one local accumulation contract.
One recorded failure
Sample boundary fixtureThis sample comes from the broken implementation of a controlled reproducer.
| Boundary fixture | Actual | Expected | Outcome |
|---|---|---|---|
| two sums | 12 | 6 | Failed |
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