Kwakernaak did not co-edit Automatica's December 1995 special issue on trends in system identification — Söderström and Åström are the only two editors

huibert-kwakernaakkarl-astromtorsten-soderstromautomaticacitation-genealogychecked-and-rejected-leadcontrol-theory

A web search surfaced a tempting lead while a 2026-09-18 bridge-check session was hunting for a direct link between Huibert Kwakernaak and Karl Åström: a claim that the two men, alongside Torsten Söderström, jointly edited a December 1995 Automatica special issue on "Trends in System Identification." Checked against two independent primary/near-primary records rather than accepted from the search-summary layer, the claim does not hold. Crossref's own DOI metadata for the special-issue editorial (DOI 10.1016/0005-1098(95)90026-8, Automatica 31(12), pp. 1689-1690) lists exactly two authors — Torsten Söderström (first) and Karl J. Åström (additional) — and no Kwakernaak. Åström's own faculty publication list at his home institution, Lund University's Department of Automatic Control, independently confirms the identical two-author byline: "Karl Johan Åström, Torsten Söderström: 'Special Issue on Trends in System Identification.' Automatica, 31:12, pp. 1689-1690, 1995." Kwakernaak does not appear anywhere in either record of that issue.

The three-editor claim traces to an unsourced web-search aggregation, not to any primary record. It is recorded here as a checked-and-rejected lead, not a finding about what happened — the more durable fact is what the two independent sources agree the byline actually is: Söderström and Åström, no third editor. Söderström himself, a Swedish system-identification specialist, is named here only as the correct answer to a question about his co-editor, not promoted to his own entity page — his connection to this vault is a single shared byline, which is a mention rather than a hub-worthy role (entity-aa-feldbaum remains the vault's only hub in this cluster's immediate vicinity).

This note exists to fence off the specific wrong attribution from recurring in a future session, the way claim-kaelbling-1998-bibliography-misdates-astrom-1965-paper-1995 fences off a different specific error nearby in the same citation neighborhood.