Journal rankings · indicator year 2021
Choose a field to open its ranking, or a journal to find its row in its subfield’s list.
Subfield ranking · 2021
Computational Theory and Mathematics journal rankings 2021
113 ranked journals · Subfield in Computer Science
Computational Theory and Mathematics has 113 ranked journals in 2021. The median journal has an OJR of 0.40, below the world average of 1.00, down 0.03 on 2020; Q1 starts at OJR 0.66. The top three are Swarm and Evolutionary Computation, Journal of Cheminformatics, and Fuzzy Sets and Systems.
Ranks and citation indicators: 2021. Journal access status and listed APC: source snapshot September 23, 2026.
Journals whose main subfield sits in this category and that published at least 30 citable documents (articles, reviews and conference papers) in 2018–2020, the window the 2021 score is computed on.
The OpenJournalRank Indicator (OJR) is a free, publicly available metric of a journal’s field-normalized citation impact, computed from open OpenAlex citation data. It compares citations to a journal’s papers from the previous three years with the world average for papers of the same subfield, year and type, so 1.00 is the world average and values can be compared across fields. It is computed with the NCI3 method.
The middle OJR among ranked journals in this category: half score higher, half lower. 1.00 is the world average for papers of the same subfield, year and type.
The dot is this category, the solid tick is the median of all ranked journals and the dashed line is the world average.
Share of ranked journals in this category that are fully open access, so every paper is free to read. Hybrid journals, which sell subscriptions and open single papers for a fee, are not counted.
Median list price of the article processing charge, in US dollars, among ranked journals in this category that list a price above zero. Journals with a listed APC of $0 and journals with no known price are left out of this median. The At a glance table below gives a second median that includes the $0 prices.
Subfields of Computer Science (11)
- Artificial Intelligence456
- Information Systems218
- Computer Vision and Pattern Recognition134
- Computer Networks and Communications126
- Computational Theory and Mathematics113
- Human-Computer Interaction28
- Computer Science Applications24
- Hardware and Architecture13
- Computer Graphics and Computer-Aided Design11
- Signal Processing9
- Software2
113 ranked journals
Filters
Rank is the position by OJR within the list on screen; 1 is the highest. | OJR is field-normalized 3-year citation impact: 1.00 is the world average for papers of the same subfield, year and type, so values compare across fields. The badge is the journal’s quartile in this list. | Citations per paper over a two-year window, counted from OpenAlex. It is not field-normalized, so compare it only between journals of the same field. ▲ or ▼ is the change from 2020. This is OpenJournalRank’s own count, not Clarivate’s Journal Impact Factor. | Citable documents (articles, reviews and conference papers) published in 2018–2020, the window the 2021 OJR is computed on. A journal needs at least 30 to be ranked. | Share of the journal’s 2018–2020 papers that are free to read in any open-access form. The green OA tag next to a title marks a fully open-access journal. | List price of the article processing charge in US dollars. “$0 listed” means the listed price is zero; a dash means no price is listed. | The line is the journal’s OJR from 2012 to 2021. | Compare |
|---|---|---|---|---|---|---|---|
1Swarm and Evolutionary ComputationElsevier BV · Netherlands | 3.96Q1 | 10.46 1.36 up from 2020 | 408 | 20% | $3,690 | ||
2Journal of CheminformaticsOABioMed Central · United Kingdom | 3.71Q1 | 11.35 4.59 up from 2020 | 215 | 100% | $2,390 | ||
3Fuzzy Sets and SystemsElsevier BV · Netherlands | 1.43Q1 | 3.49 0.13 down from 2020 | 674 | 23% | $2,550 | ||
4ACM Transactions on Mathematical SoftwareAssociation for Computing Machinery · United States | 1.34Q1 | 2.80 0.04 up from 2020 | 119 | 63% | — | ||
5Memetic ComputingSpringer Science+Business Media · Germany | 1.32Q1 | 4.09 0.99 up from 2020 | 62 | 13% | $3,990 | ||
6Journal of the ACMAssociation for Computing Machinery · United States | 1.32Q1 | 2.20 0.05 down from 2020 | 130 | 69% | — | ||
7Mathematical ProgrammingSpringer Science+Business Media · Germany | 1.30Q1 | 2.10 0.87 down from 2020 | 370 | 67% | $3,090 | ||
8Foundations of Computational MathematicsSpringer Science+Business Media · United States | 1.22Q1 | 2.41 0.08 up from 2020 | 100 | 91% | $2,290 | ||
9Journal of Computer-Aided Molecular DesignSpringer Science+Business Media · Netherlands | 1.21Q1 | 4.88 1.37 up from 2020 | 253 | 61% | $4,190 | ||
10Bulletin of the American Mathematical SocietyOAAmerican Mathematical Society · United States | 1.13Q1 | 0.93 0.06 up from 2020 | 51 | 100% | — | ||
11Molecular InformaticsWiley · Germany | 1.12Q1 | 3.54 1.10 up from 2020 | 225 | 29% | $3,800 | ||
12Journal of Global OptimizationSpringer Science+Business Media · Netherlands | 1.07Q1 | 2.14 0.26 up from 2020 | 349 | 47% | $2,990 | ||
13Computational and Applied MathematicsSpringer Science+Business Media · Brazil | 0.99Q1 | 3.48 0.92 up from 2020 | 665 | 19% | $3,390 | ||
14International Journal of General SystemsTaylor & Francis · Switzerland | 0.96Q1 | 2.71 0.68 up from 2020 | 120 | 22% | — | ||
15Journal of Optimization Theory and ApplicationsSpringer Science+Business Media · Netherlands | 0.91Q1 | 2.06 0.21 up from 2020 | 565 | 38% | $3,190 | ||
16OptimizationTaylor & Francis · Netherlands | 0.90Q1 | 1.97 0.30 up from 2020 | 497 | 19% | — | ||
17Numerical AlgorithmsSpringer Science+Business Media · Netherlands | 0.89Q1 | 2.01 0.17 down from 2020 | 572 | 32% | $3,290 | ||
18International Journal on Software Tools for Technology TransferSpringer Science+Business Media · Germany | 0.87Q1 | 1.85 0.23 up from 2020 | 105 | 68% | $3,290 | ||
19Computational ToxicologyElsevier BV · Netherlands | 0.87Q1 | 2.81 0.59 down from 2020 | 115 | 55% | $3,870 | ||
20SAR and QSAR in environmental researchTaylor & Francis · Switzerland | 0.83Q1 | 3.67 0.49 up from 2020 | 152 | 21% | — | ||
21SIAM Journal on Matrix Analysis and ApplicationsSociety for Industrial and Applied Mathematics · United States | 0.76Q1 | 1.48 0.38 down from 2020 | 217 | 64% | — | ||
22Discrete Event Dynamic SystemsSpringer Science+Business Media · United States | 0.76Q1 | 1.65 0.11 down from 2020 | 62 | 50% | $3,290 | ||
| 0.74Q1 | 1.40 0.46 up from 2020 | 84 | 90% | — | |||
24Optimization LettersSpringer Science+Business Media · Switzerland | 0.73Q1 | 1.71 0.48 up from 2020 | 431 | 41% | $3,090 | ||
25Numerical Functional Analysis and OptimizationTaylor & Francis · United States | 0.72Q1 | 1.35 0.35 up from 2020 | 243 | 17% | — | ||
26Mathematical Methods of Operations ResearchSpringer Science+Business Media · Germany | 0.70Q1 | 1.21 0.08 up from 2020 | 107 | 53% | $2,990 | ||
27Numerical Linear Algebra with ApplicationsWiley · United Kingdom | 0.70Q1 | 1.78 0.18 up from 2020 | 209 | 41% | $4,880 | ||
28Journal of Applied and Computational TopologySpringer Science+Business Media · Switzerland | 0.69Q1 | 1.05 0.20 down from 2020 | 53 | 91% | $3,390 | ||
29Carpathian Journal of MathematicsRomania | 0.66Q1 | 1.38 0.12 down from 2020 | 136 | 68% | — | ||
30Multiscale Modeling and SimulationSociety for Industrial and Applied Mathematics · United States | 0.63Q2 | 1.77 0.10 down from 2020 | 171 | 58% | — | ||
31ACM Transactions on AlgorithmsAssociation for Computing Machinery · United States | 0.61Q2 | 1.14 0.03 down from 2020 | 160 | 75% | — | ||
32SIAM Journal on ComputingSociety for Industrial and Applied Mathematics · United States | 0.60Q2 | 1.15 0.09 down from 2020 | 216 | 63% | — | ||
33Linear and Multilinear AlgebraTaylor & Francis · Netherlands | 0.57Q2 | 0.80 0.32 down from 2020 | 752 | 21% | — | ||
| 0.57Q2 | 1.11 0.30 up from 2020 | 44 | 90% | — | |||
35Foundations of Data ScienceOAAmerican Institute of Mathematical Sciences · United States | 0.56Q2 | 1.62 1.27 up from 2020 | 42 | 100% | — | ||
36SeMA JournalSpringer Science+Business Media · Italy | 0.56Q2 | 1.43 0.03 down from 2020 | 87 | 32% | $3,390 | ||
37Discrete OptimizationElsevier BV · Netherlands | 0.55Q2 | 1.23no change | 88 | 100% | $2,760 | ||
38Formal Methods in System DesignSpringer Science+Business Media · Netherlands | 0.54Q2 | 1.39 0.03 up from 2020 | 36 | 67% | $2,390 | ||
39Set-Valued and Variational AnalysisSpringer Science+Business Media · Netherlands | 0.54Q2 | 1.13 0.08 down from 2020 | 98 | 55% | $2,990 | ||
40Journal of Nonlinear Functional AnalysisUnited Kingdom | 0.53Q2 | 1.18 0.72 up from 2020 | 149 | 86% | — | ||
41Journal of the Operations Research Society of ChinaSpringer Science+Business Media · Germany | 0.52Q2 | 1.12 0.31 up from 2020 | 123 | 8% | $3,290 | ||
42Studia LogicaSpringer Science+Business Media · Poland | 0.48Q2 | 1.37 0.70 up from 2020 | 131 | 44% | $2,990 | ||
43ETNA - Electronic Transactions on Numerical AnalysisUnited States | 0.48Q2 | 1.08 0.16 down from 2020 | 136 | 98% | — | ||
44Journal of Combinatorial OptimizationSpringer Science+Business Media · Netherlands | 0.48Q2 | 1.02 0.24 down from 2020 | 420 | 22% | $3,190 | ||
45Journal of Graph TheoryWiley · United States | 0.47Q2 | 0.65 0.02 up from 2020 | 260 | 52% | $4,150 | ||
46International Journal of Quantitative Structure-Property RelationshipsIGI Global · United States | 0.47Q2 | 1.94 1.44 up from 2020 | 47 | 4% | — | ||
| 0.47Q2 | 1.00 0.37 up from 2020 | 51 | 91% | — | |||
48SIAM Journal on Applied Algebra and GeometrySociety for Industrial and Applied Mathematics · United States | 0.47Q2 | 0.94 0.34 down from 2020 | 74 | 77% | — | ||
49Discrete Applied MathematicsElsevier BV · Netherlands | 0.46Q2 | 1.00 0.01 up from 2020 | 1,229 | 80% | $3,090 | ||
50Computational ComplexityBirkhäuser · Switzerland | 0.46Q2 | 0.80 0.02 up from 2020 | 32 | 76% | $3,090 |
Subfields of Computer Science, with Computational Theory and Mathematics highlighted.
- Artificial Intelligence456
- Information Systems218
- Computer Vision and Pattern Recognition134
- Computer Networks and Communications126
- Computational Theory and Mathematics113
- Human-Computer Interaction28
- Computer Science Applications24
- Hardware and Architecture13
- Computer Graphics and Computer-Aided Design11
- Signal Processing9
- Software2
Journals
Citations made in 2021. Corpus-wide, 87.7% of core-journal articles and reviews published that year have at least one matched reference; the share varies by journal and field.
34 additional Computational Theory and Mathematics journals with metrics are unranked under this release’s eligibility rules: a journal needs at least 30 citable documents in 2018–2020, at least 80% of them with a subfield, and a positive world-average expectation. Ranks are within the whole category; filters hide rows without re-ranking. OJR excludes self-citations.
At a glance
Indicator year: 2021. Publication window: 2018–2020. How these summaries are calculated
- Ranked journals
- 113
- Window papers (baseline)
- 49,420 +11.4% from indicator year 2018
- Median OJR
- 0.40 -29.7% from indicator year 2018
- Rising journals (2025)
- 6
Window papers are the baseline paper population: citable papers (articles, reviews and conference papers) from 2018–2020 in all journals of the world-average baseline, including non-core journals, counted by each paper’s own subfield. They are not the papers of the ranked journals alone.
| Measure | Year series | 2000 | 2001 | 2002 | 2003 | 2004 | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 | 2012 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Ranked journals | 62 | 63 | 67 | 72 | 71 | 71 | 70 | 76 | 78 | 79 | 84 | 90 | 93 | 94 | 101 | 103 | 103 | 107 | 110 | 113 | 112 | 113 | 112 | 115 | 118 | 118 | |
| Window papers (baseline) | 21,393 | 22,605 | 23,564 | 25,198 | 26,730 | 28,679 | 30,899 | 33,180 | 35,970 | 38,557 | 40,422 | 41,616 | 43,188 | 44,707 | 46,025 | 46,217 | 45,838 | 45,081 | 44,376 | 45,117 | 46,476 | 49,420 | 52,123 | 54,243 | 54,878 | 56,668 | |
| Median OJR | 0.80 | 0.92 | 0.82 | 0.97 | 0.997 | 1.005 | 1.09 | 1.14 | 1.076 | 1.075 | 0.999 | 0.94 | 0.905 | 0.897 | 0.75 | 0.74 | 0.70 | 0.55 | 0.57 | 0.49 | 0.43 | 0.40 | 0.36 | 0.33 | 0.35 | 0.31 |
How to read these rankings
- OJR, the OpenJournalRank Indicator
- A field-normalized 3-year citation impact, computed from OpenAlex with the NCI3 method. It divides the citations a journal’s papers received by the world average for papers of the same subfield, year and type, so 1.00 is the world average and 2.00 means twice as many citations as expected. Because it is normalized, it can be compared across fields. Read the methodology
- Quartiles
- Q1 to Q4 split the ranked journals of the list you are viewing into four equal groups by OJR. A journal’s quartile depends on the list: the same journal can be Q1 in its subfield and Q2 among all journals.
- Impact factor (2-year)
- Citations per paper over a two-year window, counted from OpenAlex. It is easy to compare with familiar impact factors but is not field-normalized, so compare it only within a field. It is not Clarivate’s Journal Impact Factor. Why it differs from the Journal Impact Factor
- Rank ranges
- Each rank in the latest year carries a likely range from 1,000 resamples of the journal’s papers. Where two journals’ ranges overlap, the data cannot tell them apart, so treat neighbouring ranks as ties.