Unresolvable Identifier

arXiv:2605.17111 · detector doi_compliance · cross_source · 2026-05-20 15:02:37.603271+00:00

critical doi_compliance unresolvable_identifier

Identifier '10.1016/s0047-259x(03' is syntactically valid but the DOI registry (doi.org) returned 404, and Crossref / OpenAlex / internal corpus also have no record. The cited work could not be located through any authoritative source.

Paper page Integrity report arXiv Try DOI

Evidence text

doi: 10.1016/S0047-259X(03) 00096-4. Olivier Ledoit and Michael Wolf. Nonlinear shrinkage estimation of large-dimensional covariance matrices.Annals of Statistics, 40(2):1024–1060,

Evidence payload

{
  "arxiv_id": null,
  "checked_sources": [
    "crossref_by_doi",
    "openalex_by_doi",
    "doi_org_head"
  ],
  "doi": "10.1016/s0047-259x(03",
  "raw_excerpt": "doi: 10.1016/S0047-259X(03) 00096-4. Olivier Ledoit and Michael Wolf. Nonlinear shrinkage estimation of large-dimensional covariance matrices.Annals of Statistics, 40(2):1024\u20131060,",
  "ref_index": 10,
  "verdict_class": "cross_source"
}