Unresolvable Identifier

arXiv:2604.20753 · detector doi_compliance · cross_source · 2026-05-20 01:37:48.418242+00:00

critical doi_compliance unresolvable_identifier

Identifier '10.1137/080729115' 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

Chiba, H.: Extension and unification of singular perturbation methods for ODEs based on the renormalization group method. SIAM J. Appl. Dyn. Syst. 8(3), 1066–1115 (2009). https://doi.org/10.1137/080729115

Evidence payload

{
  "arxiv_id": null,
  "checked_sources": [
    "crossref_by_doi",
    "openalex_by_doi",
    "doi_org_head"
  ],
  "doi": "10.1137/080729115",
  "raw_excerpt": "Chiba, H.: Extension and unification of singular perturbation methods for ODEs based on the renormalization group method. SIAM J. Appl. Dyn. Syst. 8(3), 1066\u20131115 (2009). https://doi.org/10.1137/080729115",
  "ref_index": 18,
  "verdict_class": "cross_source"
}