Unresolvable Identifier

arXiv:2605.01942 · detector doi_compliance · cross_source · 2026-05-19 16:51:35.405228+00:00

critical doi_compliance unresolvable_identifier

Identifier '10.1049/el_19730172' 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

M. Gulamhusein, “Simple matrix-theory proof of the discrete dyadic convolution theorem,”Electronics Letters, vol. 9, pp. 238–239(1), May 1973. [Online]. Available: https://digital-library.theiet.org/content/journals/10.1049/el_19730172

Evidence payload

{
  "arxiv_id": null,
  "checked_sources": [
    "crossref_by_doi",
    "openalex_by_doi",
    "doi_org_head"
  ],
  "doi": "10.1049/el_19730172",
  "raw_excerpt": "M. Gulamhusein, \u201cSimple matrix-theory proof of the discrete dyadic convolution theorem,\u201dElectronics Letters, vol. 9, pp. 238\u2013239(1), May 1973. [Online]. Available: https://digital-library.theiet.org/content/journals/10.1049/el_19730172",
  "ref_index": 3,
  "verdict_class": "cross_source"
}