Scimago Journal & Country Rank

Forum of Mathematics, Sigmaopen access


United Kingdom

Universities and research institutions in United Kingdom

Subject Area and Category


Cambridge University Press



Publication type








How to publish in this journal


Forum of Mathematics, Sigma is the open access alternative to the leading specialist mathematics journals. Editorial decisions are made by dedicated clusters of editors concentrated in the following areas: foundations of mathematics, discrete mathematics, algebra, number theory, algebraic and complex geometry, differential geometry and geometric analysis, topology, analysis, probability, differential equations, computational mathematics, applied analysis, mathematical physics, and theoretical computer science. This classification exists to aid the peer review process. Contributions which do not neatly fit within these categories are still welcome. Forum of Mathematics, Pi and Forum of Mathematics, Sigma are an exciting new development in journal publishing. Together they offer fully open access publication combined with peer-review standards set by an international editorial board of the highest calibre, and all backed by Cambridge University Press and our commitment to quality. Strong research papers from all parts of pure mathematics and related areas will be welcomed. Join the conversation about this journal

The set of journals have been ranked according to their SJR and divided into four equal groups, four quartiles. Q1 (green) comprises the quarter of the journals with the highest values, Q2 (yellow) the second highest values, Q3 (orange) the third highest values and Q4 (red) the lowest values.

Algebra and Number Theory2019Q1
Algebra and Number Theory2020Q1
Algebra and Number Theory2021Q1
Computational Mathematics2019Q1
Computational Mathematics2020Q1
Computational Mathematics2021Q1
Discrete Mathematics and Combinatorics2019Q1
Discrete Mathematics and Combinatorics2020Q1
Discrete Mathematics and Combinatorics2021Q1
Geometry and Topology2019Q1
Geometry and Topology2020Q1
Geometry and Topology2021Q1
Mathematical Physics2019Q1
Mathematical Physics2020Q1
Mathematical Physics2021Q1
Statistics and Probability2019Q1
Statistics and Probability2020Q1
Statistics and Probability2021Q1
Theoretical Computer Science2019Q1
Theoretical Computer Science2020Q1
Theoretical Computer Science2021Q1

The SJR is a size-independent prestige indicator that ranks journals by their 'average prestige per article'. It is based on the idea that 'all citations are not created equal'. SJR is a measure of scientific influence of journals that accounts for both the number of citations received by a journal and the importance or prestige of the journals where such citations come from It measures the scientific influence of the average article in a journal, it expresses how central to the global scientific discussion an average article of the journal is.

Total Documents

Evolution of the number of published documents. All types of documents are considered, including citable and non citable documents.

Citations per document

This indicator counts the number of citations received by documents from a journal and divides them by the total number of documents published in that journal. The chart shows the evolution of the average number of times documents published in a journal in the past two, three and four years have been cited in the current year. The two years line is equivalent to journal impact factor ™ (Thomson Reuters) metric.

Cites per documentYearValue
Cites / Doc. (4 years)20130.000
Cites / Doc. (4 years)20140.400
Cites / Doc. (4 years)20151.091
Cites / Doc. (4 years)20161.197
Cites / Doc. (4 years)20171.710
Cites / Doc. (4 years)20181.683
Cites / Doc. (4 years)20191.814
Cites / Doc. (4 years)20201.739
Cites / Doc. (4 years)20211.401
Cites / Doc. (3 years)20130.000
Cites / Doc. (3 years)20140.400
Cites / Doc. (3 years)20151.091
Cites / Doc. (3 years)20161.197
Cites / Doc. (3 years)20171.739
Cites / Doc. (3 years)20181.500
Cites / Doc. (3 years)20191.768
Cites / Doc. (3 years)20201.785
Cites / Doc. (3 years)20211.183
Cites / Doc. (2 years)20130.000
Cites / Doc. (2 years)20140.400
Cites / Doc. (2 years)20151.091
Cites / Doc. (2 years)20161.196
Cites / Doc. (2 years)20171.450
Cites / Doc. (2 years)20181.422
Cites / Doc. (2 years)20191.919
Cites / Doc. (2 years)20201.064
Cites / Doc. (2 years)20211.122
Total Cites 

Evolution of the total number of citations and journal's self-citations received by a journal's published documents during the three previous years.
Journal Self-citation is defined as the number of citation from a journal citing article to articles published by the same journal.

Self Cites20130
Self Cites20140
Self Cites20150
Self Cites20160
Self Cites20170
Self Cites20180
Self Cites20192
Self Cites20202
Self Cites20213
Total Cites20130
Total Cites20142
Total Cites201536
Total Cites201673
Total Cites2017153
Total Cites2018138
Total Cites2019122
Total Cites2020141
Total Cites2021142
External Cites per Doc 
Cites per Doc

Evolution of the number of total citation per document and external citation per document (i.e. journal self-citations removed) received by a journal's published documents during the three previous years. External citations are calculated by subtracting the number of self-citations from the total number of citations received by the journal’s documents.

External Cites per document20130
External Cites per document20140.400
External Cites per document20151.091
External Cites per document20161.197
External Cites per document20171.739
External Cites per document20181.500
External Cites per document20191.739
External Cites per document20201.759
External Cites per document20211.158
Cites per document20130.000
Cites per document20140.400
Cites per document20151.091
Cites per document20161.197
Cites per document20171.739
Cites per document20181.500
Cites per document20191.768
Cites per document20201.785
Cites per document20211.183
% International Collaboration

International Collaboration accounts for the articles that have been produced by researchers from several countries. The chart shows the ratio of a journal's documents signed by researchers from more than one country; that is including more than one country address.

YearInternational Collaboration
Citable documents 
Non-citable documents

Not every article in a journal is considered primary research and therefore "citable", this chart shows the ratio of a journal's articles including substantial research (research articles, conference papers and reviews) in three year windows vs. those documents other than research articles, reviews and conference papers.

Non-citable documents20130
Non-citable documents20140
Non-citable documents20150
Non-citable documents20160
Non-citable documents20170
Non-citable documents20180
Non-citable documents20190
Non-citable documents20200
Non-citable documents20210
Citable documents20130
Citable documents20145
Citable documents201533
Citable documents201661
Citable documents201788
Citable documents201892
Citable documents201969
Citable documents202079
Citable documents2021120
Cited documents 
Uncited documents

Ratio of a journal's items, grouped in three years windows, that have been cited at least once vs. those not cited during the following year.

Uncited documents20130
Uncited documents20143
Uncited documents201516
Uncited documents201632
Uncited documents201726
Uncited documents201833
Uncited documents201921
Uncited documents202026
Uncited documents202159
Cited documents20130
Cited documents20142
Cited documents201517
Cited documents201629
Cited documents201762
Cited documents201859
Cited documents201948
Cited documents202053
Cited documents202161
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