---
id: "20260925-0206-does-åströms-1965-notes"
title: "Åström's 1965 Notes section cites Fel'dbaum's 1962 Markov-objects paper, not the 1960 Dual Control Theory papers"
type: "capture"
status: "promoted"
promoted_to: ["[[claim-astrom-1965-reference-list-contains-no-feldbaum-1960-dual-control-papers]]","[[claim-astrom-1965-reference-13-matches-feldbaum-1962-avtomat-telemekh-23-8-pp-993-1007-with-volume-slip]]"]
not_promoted: ["Claim 3 (Song Jian bridge stays at person-and-era): interpretive inference from claims 1-2 plus existing notes; folded into commentary and links, no new note.","Entity candidates: Fel'dbaum, Åström, Bellman, Pontryagin, Kolmogorov, Song Jian already have hubs (Fel'dbaum and Åström pages appended); Stratonovich/Howard/Krasovskii/Florentin/Fleming/Zachrisson are single-mention, flagged in seek-flags; concept/term candidates not stubbed."]
origin: "batch"
writer_model: "claude-sonnet-5"
date_created: "2026-09-25T00:00:00.000Z"
provenance: "this batch run, 2026-09-25"
derived_from: []
tags: ["control-theory","feldbaum","karl-astrom","song-jian","dual-control","citation-analysis","pomdp"]
source_url: "https://lup.lub.lu.se/search/files/5323668/8867085.pdf"
source_author: "Karl Johan Åström"
source_date: 1965
source_title: "Optimal Control of Markov Processes with Incomplete State Information"
source_venue: "Journal of Mathematical Analysis and Applications, vol. 10, pp. 174–205; Lund University Publications reprint (author's home-institution repository)"
source_tier: 1
source_sha: "142482afc5546ba7cf30437e28c0708037339907563569f410a944287e10414c"
seek_code_commit: "f8a723c"
---


**Short answer: no.** Åström's reference list contains exactly one Fel'dbaum entry, and it is a different work: the 1962 "On optimal control of Markov objects" (Avtomatika i Telemekhanika), not "Dual Control Theory I/II" (1960). The document-level match the topic hypothesised does not exist. Central question resolved negatively.

Method note: the Åström text is OCR (extract_pdf `method: ocr`, `tls: verified`), so the bibliography line is garbled in the cache; quotes below were checked with quote_check in pieces. Reference-list Fel'dbaum coverage was read by paging the whole Notes and References block (cache lines ~1508–1648); the body text preceding it (Sections I–VI) was not read line by line, so a body-text-only mention cannot be strictly excluded, though the Notes section itself cites only [13].

## Claim: Åström's Notes section cites Fel'dbaum only as reference [13], the 1962 paper on Markov objects
verifies: none (no named question note found)

- Claim type: historical/bibliographic, load-bearing → needs Tier 1. Met: primary document, read via extract_pdf.
- source_url: https://lup.lub.lu.se/search/files/5323668/8867085.pdf
- source_author: Karl Johan Åström
- source_date: 1965
- source_title: "Optimal Control of Markov Processes with Incomplete State Information"
- source_venue: Journal of Mathematical Analysis and Applications 10, 174–205 (Lund University Publications reprint)
- source_sha: 142482afc5546ba7cf30437e28c0708037339907563569f410a944287e10414c
- source_quote (Notes, section VII): "The foundations of the stochastic variational calculus have essentially been laid by Bellman" — continuing (OCR renders the brackets as braces) "…Bellman has strongly emphasized the use of Markovian models for control problems; this is also done by Feldbaum {13}, Florentin [14], Kolmogorov [15], Krassovskii [16], and Pontryagin {2, chap. VI]." [full-sentence quote_check failed on the OCR brace glyphs; first clause passed.]
- Bibliography entry [13], as OCR'd: "Freppaum, A. a, On optimal control of Mfarkov objects. dutem, Remote Control 24, 993-1007 (1962)." (quote_check confirmed the phrase "On optimal control of"; author name and journal are OCR-garbled and are read as Fel'dbaum, Autom. Remote Control.)
- source_tier: 1
- No 1960 entry, no "Dual Control Theory" title, and no other Fel'dbaum item appears in the reference list. Already recorded in vault: [[claim-astrom-1965-notes-section-cites-feldbaum-pontryagin-kolmogorov-lineage]]; the new content here is the negative document-level result against the 1960 papers.
- Note the context: Åström cites Fel'dbaum for *Markovian models*, not for dual control or exploration/exploitation.

## Claim: The [13] paper is a distinct document from the 1960 dual-control papers (different title, year, volume, pages)
verifies: none

- Claim type: bibliographic/quantitative (year, volume, pages) → Tier 1 required. Met via the publisher-side archive's own issue table of contents.
- source_url: https://www.mathnet.ru/php/archive.phtml?jrnid=at&wshow=issue&year=1962&volume=23&issue=8&option_lang=eng
- source_author: Math-Net.Ru (Steklov Mathematical Institute RAS) listing; paper author A. A. Feldbaum
- source_date: 1962
- source_title: "Avtomat. i Telemekh., 1962, Volume 23, Issue 8" (issue contents page; item title there: "On optimal control of Markov processes")
- source_venue: Math-Net.Ru, Avtomatika i Telemekhanika archive
- source_sha: ca572dd9fa08a078e3d9634635c65b3d8484719cab5dd82f0b3609b3566286cd
- source_quote: "On optimal control of Markov processes / A. A. Feldbaum … 993–1007"
- source_tier: 1 (archive TOC of the journal itself; the paper's full text was not read)
- Comparison: Åström's [13] gives pp. 993–1007, 1962 — matches vol. 23, issue 8 pp. 993–1007. Åström prints "24" for the volume; the archive says vol. 23 (a minor citation slip or English-translation volume numbering; unresolved). The 1960 papers are "Dual Control Theory. I" (vol. 21, no. 9, pp. 1240–1249) and "II" (vol. 21, no. 11, pp. 1453–1464), per [[claim-feldbaum-1960-papers-define-dual-control-as-additive-risk-of-action-and-risk-of-study]]. Different articles, different volumes and pages.
- Caveat: the 1962 paper's text was not read, so whether it itself builds on the 1960 dual-control work is `[unverified -- not read]`. A search-engine summary asserted the same bibliographic data but is a summarising layer and was not relied on.

## Claim: The document-level mismatch means the Song Jian bridge stays at person-and-era; Åström is a weaker link than "the same 1960 papers" would have made it
verifies: none

- Claim type: interpretive/historical inference from the two claims above; sources are those above plus [[claim-song-jian-studied-under-feldbaum-in-moscow]] (person link, already in vault at its own tier).
- What is confirmed: Song Jian studied with Fel'dbaum ([[claim-song-jian-studied-under-feldbaum-in-moscow]]); Åström 1965 cites Fel'dbaum. That is a shared person, as before.
- What is not confirmed: any shared *document*. The paper Åström cites (1962, Markov objects) is not shown to be one Song read, and is not the 1960 dual-control pair. Whether Song's own seven Russian papers on optimal control cite either Fel'dbaum work was not checked here `[unverified -- could not confirm or deny after search]`.
- Effect: the Åström→Fel'dbaum link is tightened to a specific 1962 document; the bridge to Song and to the dual-control/exploration lineage is not tightened. Compare [[observation-feldbaum-person-bridge-invisible-to-vault-bridge-tool]] and [[claim-mainstream-rl-exploration-traces-to-1933-bandit-lineage-not-feldbaum-dual-control]].

> [!note] Seek's commentary:
> The hypothesis was tidy: this week's captures read the 1960 papers in the original, so if Åström cited them the chain would be closed at the document level. It isn't. Åström cites Fel'dbaum for Markov models, and his own Notes credit Bellman as the founder. Worth noting that this pushes against reading the 1965 paper as a descendant of dual control. The vault's existing [[claim-feldbaum-1960s-dual-control-formalized-exploration-exploitation-tradeoff]] link to Åström now looks like "same author, adjacent topic" rather than a citation path.
> — Seek

## Safety flags
None fired. All fetched sources (Lund repository PDF, Math-Net.Ru issue page) were plain bibliographic content with no instructions; the PDF fetch recorded `tls: verified`.

## Further leads
- Read Fel'dbaum's 1962 "On optimal control of Markov processes" full text (Math-Net.Ru, Avtomat. i Telemekh. 23(8), 993–1007) and check whether it cites the 1960 dual-control papers — would give an indirect two-step document path.
- Check the volume discrepancy: Åström prints "Autom. Remote Control 24" vs Math-Net.Ru "Volume 23"; compare with the Springer/Consultants Bureau English translation record.
- Song Jian's own early Russian optimal-control papers (bibliography in Selected Works of Song Jian) — do they cite either Fel'dbaum work? Source: cited in [[claim-song-jian-studied-under-feldbaum-in-moscow]].
- Åström's other Fel'dbaum-adjacent citations: Stratonovich ref. "On optimal control theory. Sufficient coordinates" (Autom. Remote Control 23, 1962) in the same bibliography, the actual source of the conditional-Markov / sufficient-statistic idea (Notes: eq. 3.19 "is from Stratonovich [22]").
- Åström 1965 Notes states "the case of incomplete state information is not well-known… Theorems 1 to 5 … are believed to be new" — priority statement relevant to [[claim-kaelbling-1998-cites-astrom-1965-as-pomdp-origin]].
- Åström's Example 2 is Howard's "toymaker" with research/advertising decisions — an early explicit industrial-decision framing.

## Entity candidates
- A.A. Fel'dbaum — person — the foundational figure whose work Åström's Notes and the Song Jian link both rest on; see [[entity-aa-feldbaum]]
- Richard Bellman — person — Åström's Notes credit him with laying the foundations of stochastic variational calculus; submitted the paper
- L.S. Pontryagin — person — cited via [2, chap. VI] on Markovian control
- A.N. Kolmogorov — person — cited [15] (with Mishchenko and Pontryagin) on probability problem of optimal control
- Ruslan L. Stratonovich — person — source of the conditional Markov process concept in Åström's eq. (3.19)
- N.N. Krasovskii — person — cited [16] with Lidskii, analytical design of controllers with random attributes
- W.H. Fleming — person — cited [17] "Some Markovian optimization problems"
- J.J. Florentin — person — cited [14] continuous-time Markov stochastic control
- Ronald A. Howard — person — Åström's Example 2 is Howard's toymaker problem
- L.E. Zachrisson — person — Markov games/tank duel citations [18–20]
- Song Jian — person — the other end of the bridge; see existing entity page
- Karl Johan Åström — person — author of the 1965 paper
- Dual Control Theory — concept — Fel'dbaum's 1960 framework, not cited in Åström 1965
- Markov objects / Markov processes with incomplete state information — concept — the 1962 Fel'dbaum work and Åström's topic
- Avtomatika i Telemekhanika — term — journal venue for both Fel'dbaum works
- Math-Net.Ru — term — Steklov Institute archive; primary venue for Soviet control journals