FA-99418 / Embedding vector normalization / Member archive
Weighted centering subtracts an unweighted mean · case 03
Weighted centering subtracts an unweighted mean.
Case contract
Return vectors centered by their weighted coordinate mean; zero total weight returns copies unchanged.
Why this case matters
A small embedding preparation contract can be checked without a model or retrieval system.
One recorded failure
Sample boundary fixtureThis sample comes from the broken implementation of a controlled reproducer.
| Boundary fixture | Actual | Expected | Outcome |
|---|---|---|---|
| unequal weights | [[-3.0, -3.0], [3.0, 3.0]] | [[-1.5, -1.5], [4.5, 4.5]] | Failed |
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