Counted as completed checks in the claim sentence numerator.
Paper Integrity Record · LEDGER
Robust Heteroskedastic Matrix Factorization: A Generalization of PCA that Flags Outliers and Handles Missing Data
As of 11 July 2026, Pith completed 6 of 6 listed checks against arXiv:2607.08081. The completed checks produced no public findings within their stated scope.
This is a record of named checks, not a clean-status claim or a paper verdict.
Coverage vector
Listed checks
doi_title_agreement
completedv1.0.0, observed 2026-07-11 01:01:42.573672+00:00
- Scope
- Cited titles compared with titles resolved from their DOI or arXiv identifier.
- Completed surface
- Checked 35 references.
doi_compliance
completedv1.0.0, observed 2026-07-11 00:46:08.690011+00:00
- Scope
- DOI and arXiv identifiers listed in the bibliography checked against named registries.
- Completed surface
- Checked 46 references.
claim_evidence
completedv1.0.0, observed 2026-07-11 00:22:47.894259+00:00
- Scope
- Recorded paper claims checked for the evidence artifacts they name.
- Completed surface
- Completed within the stated scope.
citation_quote_validity
completedv0.1.0, observed 2026-07-10 17:57:23.488589+00:00
- Scope
- Specific factual attributions checked against cited-paper text available in Pith.
- Completed surface
- Completed within the stated scope.
ai_meta_artifact
completedv1.0.0, observed 2026-07-10 00:49:05.766370+00:00
- Scope
- Paper body text scanned for literal AI-assistant artifacts.
- Completed surface
- Checked 1 reference.
cited_work_retraction
completedv1.0.0, observed 2026-07-10 00:48:55.165111+00:00
- Scope
- Cited references checked for source-reported retractions or expressions of concern.
- Completed surface
- Checked 46 references.
Observations
The completed checks produced no public findings within their stated scope.
Methods and limits
Each listed check names the surface it examined. A skipped, failed, partial, unavailable, not collected, not requested, or withheld check says nothing about what a completed check would have returned.
- Only checks with status completed enter the claim sentence numerator.
- Findings appear only from completed checks and only within the scope printed for that check.
- Severity labels describe one observation row. They do not roll up into a paper judgment.