Journal profile · MATHEMATICS
Concrete Operators
ISSN 2299-3282 · De Gruyter · Poland
Concrete Operators: CAS Zone 4 · Mathematics (2025 upgraded edition); impact factor 0.3 (journal website); fully open access; APC charged, amount not published; review about 22 weeks (community reports); 2 articles in 2025; indexed in ESCI and Scopus.
Scope
Aims, scope and focus
Concrete Operators is published by De Gruyter and is in Zone 4 of Mathematics in the CAS Journal Ranking (2025 upgraded edition). By OpenAlex counts of its recent articles, its largest topics are Holomorphic and Operator Theory, Algebraic and Geometric Analysis and Advanced Banach Space Theory, together about 44.9% of its articles. Its main subfields are Applied Mathematics and Mathematical Physics. (generated from OpenAlex topic counts and CAS ranking data)
About this journal Concrete Operators is a fully peer-reviewed open access journal publishing articles devoted to all special classes of linear operators acting on function spaces. Aims and Scope Perron-Frobenius operators multiplication operators operators in reproducing Kernel Hilbert spaces weighted composition operators integral operators kernel operators Toeplitz operators Hankel operators Wiener-Hopf operators Jacobi operators weighted shift operators operators on function spaces
From the journal's Aims & Scope
Research area (LetPub): MATHEMATICS
Main research topics OpenAlex counts of recent articles; shares are approximate
- Holomorphic and Operator TheoryMathematics24.9%
- Algebraic and Geometric AnalysisMathematics12.3%
- Advanced Banach Space TheoryMathematics7.6%
- Spectral Theory in Mathematical PhysicsMathematics7.3%
- Matrix Theory and AlgorithmsComputer Science6.2%
- Advanced Harmonic Analysis ResearchMathematics6.2%
- Advanced Topics in AlgebraMathematics5.3%
- Analytic and geometric function theoryMathematics4.7%
Rankings & indexing
CAS ranking and database indexing
CAS Journal Ranking
CAS Journal Ranking, upgraded edition (March 2025)Mathematics Zone 4
| Level | Category | Zone |
|---|---|---|
| Major | Mathematics | Zone 4 |
| Minor | Mathematics | Zone 4 |
Top journal: noReview journal: no
CAS Xinrui Journal Ranking (March 2026)Mathematics Zone 4
| Level | Category | Zone |
|---|---|---|
| Major | Mathematics | Zone 4 |
| Minor | Mathematics | Zone 4 |
Top journal: noReview journal: not marked
CAS Journal Ranking, previous upgraded edition (December 2023)Not covered
Not covered by this edition.
Database indexing
ESCIScopusDOAJLetPub
International journal early-warning lists: not listed in any editionLetPub
Indexing the journal's website claims
MathSciNetPublisher website
Other: EBSCO, ProQuest, Baidu, Naver, OCLC
As the journal's website lists them, not checked against each database; for Web of Science editions the records above apply.
Editions, and major and minor categories, are shown separately and never merged into one zone; check which edition your institution uses before you submit or report.
Metrics
Impact metrics and publication volume
Impact
- Impact factor (publisher)
- 0.3Publisher website ·
- 5-year impact factor (publisher)
- 0.7Publisher website ·
- CiteScore 2026-06
- 0.9LetPub ·
- CiteScore (publisher)
- 0.9Publisher website ·
- SJR 2026-06
- 0.2LetPub ·
- SNIP 2026-06
- 1.12LetPub ·
- h-index
- 9OpenAlex ·
- i10-index
- 7OpenAlex ·
- 2-year mean citedness
- 0.19OpenAlex ·
- Self-citation rate
- 0%LetPub ·
- Share of gold OA articles
- 100%LetPub ·
Volume
- Articles per year
- 2LetPub ·
Articles by year OpenAlex count · 126 in total · the current year is incomplete
| Year | Articles | Open access | Citations |
|---|---|---|---|
| 2026 | 15 | 15 | 0 |
| 2025 | 2 | 2 | 1 |
| 2024 | 4 | 4 | 3 |
| 2023 | 9 | 9 | 10 |
| 2022 | 14 | 14 | 32 |
| 2021 | 15 | 15 | 39 |
Sources count differently and were observed at different times, so each source's own value is kept; "publisher" marks figures from the journal's website.
Review & acceptance
Review time and acceptance
- Average review time (community reports)
- about 22 weeksLetPub ·
- Submission to publication (journal-reported)
- about 22 weeksDOAJ ·
- Peer review
- Single anonymous peer reviewDOAJ
Community reports come from authors' own submissions (confidence 0.5) and are not a promise from the journal; for publisher figures, the journal's own definitions apply.
Fees & open access
APC and open-access policy
Fully open accessDOAJ
Every article is open access; authors usually pay an article processing charge (APC).
| Source | APC | Fee waiver | License | Observed |
|---|---|---|---|---|
| DOAJ | EUR 750 | Yes | CC BY | |
| OpenAlex | EUR 750 | — | — | |
| LetPub | EUR 500 | Yes | — |
The journal's website is authoritative for fees; sources were observed at different times and each keeps its own value, without averaging.
Profile
Publication details and official links
- Publisher
- De Gruyter
- Country or region
- Poland
- Language
- English
- ISSN
- 2299-3282
- Official links
- Journal homepage ↗DOAJ
- Author guidelines ↗DOAJ
- Aims & Scope ↗DOAJ
- Special issues ↗Publisher website
- APC information ↗DOAJ
- Fee waivers ↗DOAJ
- Open access statement ↗DOAJ
- License & copyright ↗DOAJ
- Peer review process ↗DOAJ
- Editorial board ↗DOAJ
- Plagiarism policy ↗DOAJ
FAQ
Frequently asked questions about Concrete Operators
What CAS zone is Concrete Operators in?
In the 2025 upgraded edition of the CAS Journal Ranking, Concrete Operators is in Zone 4 of Mathematics, and in Zone 4 of the minor category Mathematics. In the 2026 Xinrui edition it is in Zone 4 of Mathematics. Zones from different editions, and from major and minor categories, are not interchangeable.
What is the impact factor of Concrete Operators?
The journal's website gives an impact factor of 0.3; this is the journal's own figure, as LetPub lists none for it; CiteScore 0.9, h-index 9.
How long does peer review take at Concrete Operators?
Authors report an average review time of about 22 weeks. Article statistics cover accepted papers only, publisher figures follow the journal's own definitions, and community reports come from authors' own submissions; none is a promise from the journal.
Which databases index Concrete Operators?
According to LetPub and DOAJ records, Concrete Operators is indexed in ESCI, Scopus and DOAJ. The journal's website also lists MathSciNet; that list has not been checked against each database.
Is Concrete Operators open access, and what is the APC?
Concrete Operators is a fully open-access journal. APC charged, amount not published.
Sources and updates
The facts on this page come from LetPub, OpenAlex, Publisher website, DOAJ; every figure is tagged with its source and the date it was observed, and conflicting values are kept per source. LetPub source page: view ↗ (archived 2026-08-26). Last updated: .