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7/7 checkable references clean · checked 2026-08-27
Every reference with a DOI in the deposited reference list resolved to a known work in Crossref or DataCite at the dated check, and none carried a retraction, withdrawal, or removal notice.
4 without a DOI — not checked. A reference deposited without a DOI is never matched by title or guessed at; it stays outside the checked set, and this line discloses that.
The 7 checked references that resolve
resolves10.1007/978-3-642-85938-0
Commutation Properties of Hilbert Space Operators and Related Topics
The 4 references without a DOI — listed, not checked
no DOI — not checkedBeauzamy B,Introduction to operator theory and invariant subspaces (Amsterdam: North-Holland) (1988)
no DOI — not checkedBharucha-Reid A T,Random Integral Equations (New York and London: Academic Press) (1972)
no DOI — not checkedRudin R W,Functional Analysis (New York: McGraw-Hill) (1973)
no DOI — not checkedSirokov F V, Proof of a conjecture of Kaplansky,Usephi. Math. Nauk. 11 (1956) 167–168
What this badge says. CiteStamped means the CHECKABLE references of this
work were clean at the dated check: each resolved to a known work in a public registry, and none
carried a retraction notice at that time. It says nothing about the quality, findings,
or importance of the work itself, and nothing about references deposited without a DOI.
checked 2026-08-27 — re-checked daily as this page is visited; titles and statuses come from Crossref and DataCite and are not part of the signed record
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