Journal of Approximation Theory
Leading citation impact metric from Clarivate Journal Citation Reports
44 papers with at least that number of citations each
State Council for Professorship (HĐGSNN) Scoring
Quyết định số 26/QĐ-HĐGSNN ngày 11/7/2025 (Mục quốc tế)
HĐGSNN Score History
By article publication year| Year | Max Score | Evaluation Details | Source |
|---|---|---|---|
| 2026 | 1.50đ | WoS Q2(IF: 0.7) | 🔵 Computed |
| 2025 | 1.50đ | WoS Q2(IF: 0.6) | 🔵 Computed |
| 2024 | 1.50đ | WoS Q2(IF: 0.9) | 🔵 Computed |
| 2023 | 1.50đ | WoS Q2(IF: 0.9) | 🔵 Computed |
| 2022 | 1.50đ | WoS Q2(IF: 0.993) | 🔵 Computed |
| 2021 | 1.50đ | WoS Q2(IF: 1.091) | 🔵 Computed |
| 2020 | 1.50đ | WoS Q2(IF: 0.825) | 🔵 Computed |
| 2019 | 1.50đ | WoS Q2(IF: 1.022) | 🔵 Computed |
| 2018 | 1.50đ | WoS Q2(IF: 0.939) | 🔵 Computed |
Note: Domestic journal scores are officially collected from annual HĐGSNN decisions across councils. International journal scores are dynamically computed according to Decision 26/QĐ-HĐGSNN based on quartile and citation metrics in the publication year.
Aims & Scope
The Journal of Approximation Theory is devoted to advances in pure and applied approximation theory and related areas. These areas include, among others: • Classical approximation • Abstract approximation • Constructive approximation • Degree of approximation • Fourier expansions • Interpolation of operators • General orthogonal systems • Interpolation and quadratures • Multivariate approximation • Orthogonal polynomials • Padé approximation • Rational approximation • Spline functions of one and several variables • Approximation by radial basis functions in Euclidean spaces, on spheres, and on more general manifolds • Special functions with strong connections to classical harmonic analysis, orthogonal polynomial, and approximation theory (as opposed to combinatorics, number theory, representation theory, generating functions, formal theory, and so forth) • Approximation theoretic aspects of real or complex function theory, function theory, difference or differential equations, function spaces, or harmonic analysis • Wavelet Theory and its applications in signal and image processing, and in differential equations with special emphasis on connections between wavelet theory and elements of approximation theory (such as approximation orders, Besov and Sobolev spaces, and so forth) • Gabor (Weyl-Heisenberg) expansions and sampling theory.
SCImago & Scopus Journal Intelligence
Global SCImago ranking, SJR prestige index, Scopus coverage, and societal policy impact
Weighted prestige citation metric per document indexed in the Scopus database.
Measures cumulative publication volume and citation impact.
Average citations received per document published in the 2-year window.
Estimated Article Processing Charge for Open Access publication.
Scopus 3-Year Publication & Citation Window
Aggregated from Scopus database across the 3-year SJR evaluation window.
Societal Impact & Inclusivity (SCImago)
Citations in government and international policy documents
Percentage of female authors published in the journal
Real-world societal policy reach and author gender diversity tracked by SCImago.
Scopus Subject Categories
Chinese Academy of Sciences (CAS) Classification
Major / minor zone classification and CAS Early Warning List history
Publishing & Editorial Information
Detailed publisher, peer-review turnaround, and publication cycle specifications
WoS Categories & Quartiles
Detailed JCR / JCI category rankings and quartile breakdown from Clarivate
| Category | Index | Rank | Quartile |
|---|---|---|---|
MATHEMATICS | JCRSCIE | 259/492 | Q3 |
MATHEMATICS | JCISCIE | 209/492 | Q2 |
Annual Historical Statistics & Publications
Track annual publication volume, total citations, and Impact Factor evolution
| Year | Impact Factor | Articles / Year | Total Citations |
|---|---|---|---|
| 2026 | — | 22 | 3 |
| 2025 | 0.6 | 75 | 29 |
| 2024 | 0.9 | 73 | 89 |
| 2023 | 0.9 | 68 | 145 |
| 2022 | 0.993 | 60 | 158 |
| 2021 | 1.091 | 72 | 239 |
| 2020 | 0.825 | 81 | 304 |
| 2019 | 1.022 | 89 | 423 |
| 2018 | 0.939 | 75 | 343 |
| 2017 | — | 90 | 559 |
| 2016 | — | 107 | 844 |
| 2015 | — | 98 | 774 |
Journal Metrics & Citation Visualizations
Impact Factor Trend (2018–2024)
Clarivate IF trend for Journal of Approximation Theory
Total Cites vs Self-Cites
Evaluation of scholarly independence and citation reach
Citations per Document
Citation metric windows across 2, 3, and 4 years
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