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Journal of Operator Theory is Scopus-indexed (Q3, CiteScore 1.2), WoS SCIE. Published by Theta Foundation.
Checked against the index lists dated .
ISSN 0379-4024Verify ISSN ↗1841-7744Verify ISSN ↗
Publisher: Theta Foundation
Cost to publish: No APC data — check the publisher
| Subject area | Rank | Pctile | Q |
|---|---|---|---|
| Algebra and Number Theory | 70 / 137 | 49th | Q3 |
Not listed in: DOAJ, ABDC, ABS / AJG, FT50, UT Dallas, ONOS (subscription), ONOS (APC covered)
Yes — actively indexed in Scopus, coverage 2000–present (also 1996–1998), best quartile Q3, CiteScore 1.2.
Journal of Operator Theory is Q3 in Algebra and Number Theory (rank 70 of 137), by CiteScore 2025.
Journal of Operator Theory is indexed in the Science Citation Index Expanded, so it may have a Journal Impact Factor in Clarivate's Journal Citation Reports. JCR is paid, so check it for the current value. The closest free measure is its Scopus CiteScore 1.2, which places it in quartile Q3 at the 49th percentile of its subject. Its SCImago Journal Rank (SJR, a free Scopus-based metric) is 0.580, quartile Q2, with an H-index of 44.
Journal of Operator Theory is published by Theta Foundation. Its print ISSN is 0379-4024 and its online ISSN is 1841-7744.
Yes — indexed in the Science Citation Index Expanded.
No — it is not registered as an open-access journal in DOAJ or Scopus.
Journal of Operator Theory has an h-index of 22 and a 2-year mean of 2.15 citations per paper (OpenAlex). Its Scopus CiteScore is 1.2, quartile Q3. On 2-year citations it ranks #7 of 129 Scopus journals in Algebra and Number Theory.
Journal of Operator Theory published 48 papers in 2025; its busiest recent year was 2021 with 61. 2026* is the year so far.
h-index, i10-index and 2-year mean citedness are open, licence-clear metrics from OpenAlex — not a proprietary impact factor. The subject rank counts only journals that OpenAlex has a figure for; it is not a Scopus or Clarivate ranking. Updated 2026-10-14.
In its latest 21 research articles (2024–2026), authors are most often from India (19%), United States (18.3%) and China (11.9%).
Countries are counted fractionally, so a paper by authors from two countries counts half to each.
Scopus status: Active. No retracted papers are recorded. The Problematic Paper Screener flags none of its papers. These are indicators to check, not findings against the journal.
Retractions from OpenAlex; flags from the Problematic Paper Screener (Cabanac, Labbé & Magazinov, CC BY), 2026-09-21 export. A flag marks a paper for a closer look; it is not a finding against the journal.
Index data is curated from public sources (Scopus, Web of Science, ABDC, FT50, UT Dallas, DOAJ). CiteScore and quartiles reflect the latest available Scopus release. Always verify a journal's current status on its official source before submitting.
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