FA-100443 / Sparse tensor canonicalization / Member archive
Sparse tensor: duplicate coordinates are overwritten instead of summed · case 03
duplicate coordinates are overwritten instead of summed.
Case contract
Entries are [row,column,value]. Return lexically sorted coordinate/value rows, summing all values at equal coordinates.
Why this case matters
A small offline sparse-array operation has explicit coordinate and storage semantics.
One recorded failure
Sample boundary fixtureThis sample comes from the broken implementation of a controlled reproducer.
| Boundary fixture | Actual | Expected | Outcome |
|---|---|---|---|
| duplicate add | [[0, 1, 2]] | [[0, 1, 5]] | Failed |
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