Unresolvable Identifier

arXiv:2604.22672 · detector doi_compliance · cross_source · 2026-05-19 23:45:35.994489+00:00

critical doi_compliance unresolvable_identifier

Identifier '10.1007/s12532-017-0127-0/figures/4' 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

B. Nicholson, J. D. Siirola, J. P. Watson, V . M. Zavala, L . T. Biegler, pyomo.dae: a modeling and automatic discretizati on frame- work for optimization with diﬀerential and algebraic equat ions, Mathematical Programming Computation 10 (2) (2018) 187–22 3. doi:10.1007/S12532-017-0127-0/FIGURES/4

Evidence payload

{
  "arxiv_id": null,
  "checked_sources": [
    "crossref_by_doi",
    "openalex_by_doi",
    "doi_org_head"
  ],
  "doi": "10.1007/s12532-017-0127-0/figures/4",
  "raw_excerpt": "B. Nicholson, J. D. Siirola, J. P. Watson, V . M. Zavala, L . T. Biegler, pyomo.dae: a modeling and automatic discretizati on frame- work for optimization with di\ufb00erential and algebraic equat ions, Mathematical Programming Computation 10 (2) (2018) 187\u201322 3. doi:10.1007/S12532-017-0127-0/FIGURES/4",
  "ref_index": 28,
  "verdict_class": "cross_source"
}