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Journal of Approximation Theory is Scopus-indexed (Q2, CiteScore 1.6), WoS SCIE. It is covered by India's One Nation One Subscription scheme for reading access. Published by Academic Press Inc..
Checked against the index lists dated .
ISSN 0021-9045Verify ISSN ↗1096-0430Verify ISSN ↗
Publisher: Academic Press Inc.
Cost to publish: About US$2,910 to publish open access (publisher list price, via OpenAlex) — subscription publishing may be free
| Subject area | Rank | Pctile | Q |
|---|---|---|---|
| Mathematics (all) | 176 / 414 | 57th | Q2 |
| Analysis | 109 / 210 | 48th | Q3 |
| Applied Mathematics | 428 / 680 | 37th | Q3 |
| Numerical Analysis | 63 / 93 | 32nd | Q3 |
Not listed in: DOAJ, ABDC, ABS / AJG, FT50, UT Dallas, ONOS (APC covered)
Yes — actively indexed in Scopus, coverage 1968–present, best quartile Q2, CiteScore 1.6.
Journal of Approximation Theory is Q2 in Mathematics (all) (rank 176 of 414), Q3 in Analysis (rank 109 of 210) and Q3 in Applied Mathematics (rank 428 of 680), by CiteScore 2025. It is ranked in 4 subject areas in all.
Journal of Approximation 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 1.6, which places it in quartile Q2 at the 57th percentile of its subject. Its SCImago Journal Rank (SJR, a free Scopus-based metric) is 0.400, quartile Q2, with an H-index of 62.
The publisher lists an article processing charge of about US$2,910 for open access (source: OpenAlex). Many journals also publish by the subscription route at no cost to the author, so confirm on the journal's own website.
Journal of Approximation Theory is published by Academic Press Inc. Its print ISSN is 0021-9045 and its online ISSN is 1096-0430.
Yes. It is part of the One Nation One Subscription (ONOS) national subscription, so readers at participating Indian institutions get its full text. ONOS does not cover its article processing charge.
Yes — indexed in the Science Citation Index Expanded.
No — it is not registered as an open-access journal in DOAJ or Scopus.
Journal of Approximation Theory has an h-index of 99 and a 2-year mean of 0.75 citations per paper (OpenAlex). Its Scopus CiteScore is 1.6, quartile Q2. On 2-year citations it ranks #183 of 392 Scopus journals in Mathematics (all).
Journal of Approximation Theory published 76 papers in 2025; its busiest recent year was 2017 with 90. 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 80 research articles (2024–2026), authors are most often from United States (12.3%), China (10.4%) and Germany (8.8%).
Countries are counted fractionally, so a paper by authors from two countries counts half to each.
Scopus status: Active. 1 retracted paper is recorded (0.2 per 1,000 papers). 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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