Broken Identifier

arXiv:2605.03102 · detector doi_compliance · incontrovertible · 2026-05-19 15:43:38.308405+00:00

critical doi_compliance broken_identifier

DOI '10.1142/13670' as printed in the bibliography is syntactically invalid and cannot resolve.

Paper page Integrity report arXiv Try DOI

Evidence text

Perrone, Paolo , year=. Starting Category Theory , ISBN=. doi:10.1142/13670 , publisher=

Evidence payload

{
  "doi_as_printed": "10.1142/13670",
  "raw_excerpt": "Perrone, Paolo , year=. Starting Category Theory , ISBN=. doi:10.1142/13670 , publisher=",
  "ref_index": 98,
  "verdict_class": "incontrovertible"
}