Journal profile · Mathematics
INTERFACES AND FREE BOUNDARIES
ISSN 1463-9963 · eISSN 1463-9971 · European Mathematical Society Publishing House · SWITZERLAND · Quarterly
INTERFACES AND FREE BOUNDARIES: CAS Zone 3 · Mathematics (2025 upgraded edition); impact factor 1.05; diamond open access (no APC); no APC; review over 12 weeks (community reports); community-reported acceptance: easy; 19 articles in 2025; indexed in SCIE and Scopus.
Scope
Aims, scope and focus
INTERFACES AND FREE BOUNDARIES is published by European Mathematical Society Publishing House and is in Zone 3 of Mathematics in the CAS Journal Ranking (2025 upgraded edition). By OpenAlex counts of its recent articles, its largest topics are Advanced Mathematical Modeling in Engineering, Nonlinear Partial Differential Equations and Solidification and crystal growth phenomena, together about 42.8% of its articles. Its main subfields are Applied Mathematics. (generated from OpenAlex topic counts and CAS ranking data)
Interfaces and Free Boundaries is dedicated to the mathematical modelling, analysis and computation of interfaces and free boundary problems in all areas where such phenomena are pertinent. The journal aims to be a forum where mathematical analysis, partial differential equations, modelling, scientific computing and the various applications which involve mathematical modelling meet. Submissions should, ideally, emphasize the combination of theory and application.
From the journal's Aims & Scope
Research area (LetPub): Mathematics
Main research topics OpenAlex counts of recent articles; shares are approximate
- Advanced Mathematical Modeling in EngineeringComputer Science22.8%
- Nonlinear Partial Differential EquationsMathematics13.2%
- Solidification and crystal growth phenomenaMaterials Science6.8%
- Geometric Analysis and Curvature FlowsMathematics6.2%
- Navier-Stokes equation solutionsMathematics5.3%
- Advanced Numerical Methods in Computational MathematicsEngineering4.5%
- Numerical methods in inverse problemsMathematics4.3%
- Theoretical and Computational PhysicsPhysics and Astronomy3.6%
Rankings & indexing
CAS ranking and database indexing
CAS Journal Ranking
CAS Journal Ranking, upgraded edition (March 2025)Mathematics Zone 3
| Level | Category | Zone |
|---|---|---|
| Major | Mathematics | Zone 3 |
| Minor | Mathematics | Zone 4 |
| Minor | Mathematics, Applied | Zone 4 |
Top journal: noReview journal: no
CAS Xinrui Journal Ranking (March 2026)Mathematics Zone 3
| Level | Category | Zone |
|---|---|---|
| Major | Mathematics | Zone 3 |
| Minor | Mathematics, Applied | Zone 3 |
| Minor | Mathematics | Zone 3 |
Top journal: noReview journal: not marked
CAS Journal Ranking, previous upgraded edition (December 2023)Mathematics Zone 4
| Level | Category | Zone |
|---|---|---|
| Major | Mathematics | Zone 4 |
| Minor | Mathematics | Zone 4 |
| Minor | Mathematics, Applied | Zone 4 |
Top journal: noReview journal: no
Database indexing
SCIEScopusDOAJLetPub
International journal early-warning lists: not listed in any editionLetPub
Indexing the journal's website claims
Web of ScienceMathSciNetzbMATHPublisher website
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
- 1.05LetPub ·
- CiteScore 2026-06
- 2LetPub ·
- SJR 2026-06
- 0.96LetPub ·
- SNIP 2026-06
- 0.73LetPub ·
- h-index
- 31LetPub ·
- h-index
- 49OpenAlex ·
- i10-index
- 280OpenAlex ·
- 2-year mean citedness
- 1.18OpenAlex ·
- Self-citation rate
- 8.3%LetPub ·
- Share of gold OA articles
- 100%LetPub ·
Volume
- Articles per year
- 35LetPub ·
Articles by year OpenAlex count · 583 in total · the current year is incomplete
| Year | Articles | Open access | Citations |
|---|---|---|---|
| 2026 | 26 | 26 | 26 |
| 2025 | 19 | 19 | 4 |
| 2024 | 33 | 33 | 62 |
| 2023 | 18 | 18 | 54 |
| 2022 | 20 | 20 | 111 |
| 2021 | 19 | 19 | 82 |
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)
- over 12 weeksLetPub ·
- Average acceptance (community reports)
- EasyLetPub ·
- Submission to publication (journal-reported)
- about 69 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
Diamond open access (no APC)DOAJ
Every article is open access and authors pay no article processing charge.
| Source | APC | Fee waiver | License | Observed |
|---|---|---|---|---|
| DOAJ | No APC | No | CC BY |
The journal's website is authoritative for fees; sources were observed at different times and each keeps its own value, without averaging.
Submission
Article types and submission policies (journal website)
Policy excerpts from the journal's websitePublication ethics, Open access, Peer review
- Publication ethics
Adheres to the European Mathematical Society Code of Practice and the publisher's Code of Conduct and Publishing Ethics. Model summary
The journal is owned by the European Mathematical Society and it adheres to its Code of Practice and the publisher's Code of Conduct and Publishing Ethics.
Source ↗Publisher website ·- Open access Open Access
Subscribe to Open model: issues published between 1 January 2021 and 31 December 2026 are accessible as open access. Model summary
Interfaces and Free Boundaries is a Subscribe to Open (S2O) journal, which means that articles may be published open access. There are no author fees or article processing charges associated with this model of open access. Open access articles are published under the CC-BY 4.0 license. The articles that are not published with proper open access, are granted the so-called green open access, meaning…
Source ↗Publisher website ·- Peer review Peer Review
Single blind peer review process conducted by external reviewers selected by the editorial board. Model summary
Interfaces and Free Boundaries operates a single blind peer review process conducted by external reviewers selected by the editorial board.
Source ↗Publisher website ·
Excerpts are quoted from the journal's website; "model summary" lines are written by Workers AI and checked against the text. The journal's website is authoritative.
Profile
Publication details and official links
- Publisher
- European Mathematical Society Publishing House
- Country or region
- SWITZERLAND
- Language
- English
- Frequency
- Quarterly
- ISSN
- 1463-9963
- Electronic ISSN
- 1463-9971
- Official links
FAQ
Frequently asked questions about INTERFACES AND FREE BOUNDARIES
What CAS zone is INTERFACES AND FREE BOUNDARIES in?
In the 2025 upgraded edition of the CAS Journal Ranking, INTERFACES AND FREE BOUNDARIES is in Zone 3 of Mathematics, and in Zone 4 of the minor category Mathematics / Mathematics, Applied. In the 2026 Xinrui edition it is in Zone 3 of Mathematics. Zones from different editions, and from major and minor categories, are not interchangeable.
What is the impact factor of INTERFACES AND FREE BOUNDARIES?
The latest impact factor listed by LetPub is 1.05; CiteScore 2, h-index 49.
How long does peer review take at INTERFACES AND FREE BOUNDARIES?
Authors report an average review time of over 12 weeks; the community-reported acceptance is “Easy”. 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 INTERFACES AND FREE BOUNDARIES?
According to LetPub and DOAJ records, INTERFACES AND FREE BOUNDARIES is indexed in SCIE, Scopus and DOAJ. The journal's website also lists Web of Science, MathSciNet and zbMATH; that list has not been checked against each database.
Is INTERFACES AND FREE BOUNDARIES open access, and what is the APC?
INTERFACES AND FREE BOUNDARIES is a diamond open-access journal (no APC). It charges no article processing charge.
Sources and updates
The facts on this page come from LetPub, OpenAlex, DOAJ, Publisher website; 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: .