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Theory and Applications of Categories is Scopus-indexed (Q3, CiteScore 0.9), WoS SCIE. Published by Mount Allison University.
Checked against the index lists dated .
ISSN 1201-561XVerify ISSN ↗
Publisher: Mount Allison University
Cost to publish: No APC data — check the publisher
| Subject area | Rank | Pctile | Q |
|---|---|---|---|
| Mathematics (miscellaneous) | 82 / 119 | 31st | Q3 |
Not listed in: DOAJ, ABDC, ABS / AJG, FT50, UT Dallas, ONOS (subscription), ONOS (APC covered)
Yes — actively indexed in Scopus, coverage 1996–present, best quartile Q3, CiteScore 0.9.
Theory and Applications of Categories is Q3 in Mathematics (miscellaneous) (rank 82 of 119), by CiteScore 2025.
Theory and Applications of Categories 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 0.9, which places it in quartile Q3 at the 31st percentile of its subject. Its SCImago Journal Rank (SJR, a free Scopus-based metric) is 0.625, quartile Q2, with an H-index of 41.
Theory and Applications of Categories is published by Mount Allison University. Its ISSN is 1201-561X.
Yes — indexed in the Science Citation Index Expanded.
No — it is not registered as an open-access journal in DOAJ or Scopus.
Theory and Applications of Categories has an h-index of 41 and a 2-year mean of 0.37 citations per paper (OpenAlex). Its Scopus CiteScore is 0.9, quartile Q3. On 2-year citations it ranks #78 of 108 Scopus journals in Mathematics (miscellaneous).
Theory and Applications of Categories published 30 papers in 2025; its busiest recent year was 2016 with 105. 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 14 research articles (2024–2025), authors are most often from France (35.7%), Canada (25%) and Denmark (14.3%).
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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