Journal rankings · indicator year 2018
Choose a field to open its ranking, or a journal to find its row in its subfield’s list.
Subfield ranking · 2018
Discrete Mathematics and Combinatorics journal rankings 2018
13 ranked journals · Subfield in Mathematics
Discrete Mathematics and Combinatorics has 13 ranked journals in 2018. The median OJR fell 0.16 on 2017 to 0.73, below the world average of 1.00; Q1 starts at OJR 0.97. The top three are Combinatorics Probability Computing, COMBINATORICA, and Journal of Algebraic Combinatorics.
Ranks and citation indicators: 2018. 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 2015–2017, the window the 2018 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 Mathematics (10)
13 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 2017. This is OpenJournalRank’s own count, not Clarivate’s Journal Impact Factor. | Citable documents (articles, reviews and conference papers) published in 2015–2017, the window the 2018 OJR is computed on. A journal needs at least 30 to be ranked. | Share of the journal’s 2015–2017 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 2009 to 2018. | Compare |
|---|---|---|---|---|---|---|---|
1Combinatorics Probability ComputingCambridge University Press · United Kingdom | 1.05Q1 | 0.87 0.05 up from 2017 | 135 | 76% | $3,550 | ||
2COMBINATORICASpringer Science+Business Media · Germany | 1.03Q1 | 0.95 0.05 down from 2017 | 141 | 59% | $3,290 | ||
3Journal of Algebraic CombinatoricsSpringer Science+Business Media · United States | 1.00Q1 | 0.67 0.05 down from 2017 | 228 | 98% | $3,090 | ||
4Journal of Combinatorial Theory Series AElsevier BV · United States | 0.97Q1 | 0.77 0.18 down from 2017 | 286 | 96% | $4,210 | ||
5Random Structures and AlgorithmsWiley · United States | 0.79Q2 | 0.81 0.02 up from 2017 | 140 | 68% | $4,550 | ||
6Advances in Applied MathematicsElsevier BV · United States | 0.76Q2 | 0.75 0.11 up from 2017 | 188 | 95% | $3,380 | ||
7Journal of Combinatorial Theory Series BElsevier BV · United States | 0.73Q2 | 0.89 0.11 down from 2017 | 223 | 100% | $4,150 | ||
8European Journal of CombinatoricsElsevier BV · Netherlands | 0.73Q3 | 0.62 0.19 down from 2017 | 413 | 98% | $3,560 | ||
9Ricerche di MatematicaSpringer Science+Business Media · Italy | 0.68Q3 | 1.17 0.13 up from 2017 | 121 | 33% | $3,190 | ||
10Annals of CombinatoricsBirkhäuser · Singapore | 0.62Q3 | 0.51 0.15 down from 2017 | 119 | 64% | $2,990 | ||
11Journal of Group TheoryDe Gruyter · Germany | 0.54Q4 | 0.33 0.03 down from 2017 | 164 | 75% | $2,712 | ||
12The Electronic Journal of CombinatoricsOAElectronic Journal of Combinatorics · United States | 0.43Q4 | 0.42 0.02 down from 2017 | 674 | 100% | — | ||
13Journal of CombinatoricsElectronic Journal of Combinatorics · United States | 0.16Q4 | 0.15 0.08 down from 2017 | 89 | 73% | — |
Subfields of Mathematics, with Discrete Mathematics and Combinatorics highlighted.
- Applied Mathematics178
- Statistics and Probability135
- Geometry and Topology133
- Mathematical Physics60
- Modeling and Simulation36
- Algebra and Number Theory25
- Discrete Mathematics and Combinatorics13
- Numerical Analysis6
- Theoretical Computer Science2
- Computational Mathematics0
Journals
Citations made in 2018. Corpus-wide, 81.5% of core-journal articles and reviews published that year have at least one matched reference; the share varies by journal and field.
4 additional Discrete Mathematics and Combinatorics journals with metrics are unranked under this release’s eligibility rules: a journal needs at least 30 citable documents in 2015–2017, 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: 2018. Publication window: 2015–2017. How these summaries are calculated
- Ranked journals
- 13
- Window papers (baseline)
- 6,830 +5.0% from indicator year 2015
- Median OJR
- 0.73 -33.7% from indicator year 2015
- Rising journals (2025)
- 3
Window papers are the baseline paper population: citable papers (articles, reviews and conference papers) from 2015–2017 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 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 13 | 13 | 13 | 13 | 13 | 14 | 13 | 13 | 13 | 13 | 13 | 13 | 14 | 15 | 15 | 15 | 17 | 18 | 18 | |
| Window papers (baseline) | 2,954 | 3,179 | 3,372 | 3,631 | 3,855 | 4,032 | 4,235 | 4,483 | 4,813 | 5,200 | 5,530 | 5,653 | 5,903 | 6,060 | 6,428 | 6,503 | 6,778 | 6,837 | 6,830 | 6,805 | 6,953 | 7,242 | 7,388 | 7,362 | 7,239 | 7,022 | |
| Median OJR | 0.92 | 0.96 | 1.005 | 0.98 | 1.04380 | 1.1488 | 1.1494 | 1.22 | 1.23 | 1.20 | 1.02 | 1.12 | 1.08 | 1.04378 | 1.1489 | 1.10 | 1.003 | 0.89 | 0.73 | 0.64 | 0.58 | 0.52 | 0.510 | 0.512 | 0.55 | 0.54 |
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.