Unresolvable Identifier

arXiv:2604.19076 · detector doi_compliance · cross_source · 2026-05-20 03:22:56.253341+00:00

critical doi_compliance unresolvable_identifier

Identifier '10.5555/645527.657464' 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

Saunders, C., Gammerman, A., Vovk, V.: Ridge regression learning algorithm in dual variables. In: Proceedings of the Fifteenth International Conference on Machine Learning. ICML ’98, pp. 515–521. Morgan Kaufmann Publishers Inc., San Francisco, CA, USA (1998). https://doi.org/10.5555/645527.657464

Evidence payload

{
  "arxiv_id": null,
  "checked_sources": [
    "crossref_by_doi",
    "openalex_by_doi",
    "doi_org_head"
  ],
  "doi": "10.5555/645527.657464",
  "raw_excerpt": "Saunders, C., Gammerman, A., Vovk, V.: Ridge regression learning algorithm in dual variables. In: Proceedings of the Fifteenth International Conference on Machine Learning. ICML \u201998, pp. 515\u2013521. Morgan Kaufmann Publishers Inc., San Francisco, CA, USA (1998). https://doi.org/10.5555/645527.657464",
  "ref_index": 32,
  "verdict_class": "cross_source"
}