Scimago Journal & Country Rank

Semigroup Forum

H Index
Subject Area and CategoryMathematics
Algebra and Number Theory
PublisherSpringer Verlag
Publication typeJournals
ISSN00371912, 14322137
Scope Semigroup Forum is a platform for speedy and efficient transmission of information on current research in semigroup theory. Scope: Algebraic semigroups, topological semigroups, partially ordered semigroups, semigroups of measures and harmonic analysis on semigroups, transformation semigroups, semigroups of operators, and applications of semigroup theory to other disciplines such as ring theory, category theory, automata, logic, etc. Languages: English (preferred), French, German, Russian. (source)

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 Theory1997Q3
Algebra and Number Theory1998Q3
Algebra and Number Theory1999Q3
Algebra and Number Theory2000Q3
Algebra and Number Theory2001Q3
Algebra and Number Theory2002Q4
Algebra and Number Theory2003Q3
Algebra and Number Theory2004Q3
Algebra and Number Theory2005Q2
Algebra and Number Theory2006Q2
Algebra and Number Theory2007Q3
Algebra and Number Theory2008Q2
Algebra and Number Theory2009Q2
Algebra and Number Theory2010Q2
Algebra and Number Theory2011Q1
Algebra and Number Theory2012Q2
Algebra and Number Theory2013Q3
Algebra and Number Theory2014Q3
Algebra and Number Theory2015Q2
Algebra and Number Theory2016Q2

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.

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)19990.338
Cites / Doc. (4 years)20000.284
Cites / Doc. (4 years)20010.214
Cites / Doc. (4 years)20020.273
Cites / Doc. (4 years)20030.261
Cites / Doc. (4 years)20040.410
Cites / Doc. (4 years)20050.382
Cites / Doc. (4 years)20060.433
Cites / Doc. (4 years)20070.419
Cites / Doc. (4 years)20080.518
Cites / Doc. (4 years)20090.624
Cites / Doc. (4 years)20100.577
Cites / Doc. (4 years)20110.810
Cites / Doc. (4 years)20120.671
Cites / Doc. (4 years)20130.615
Cites / Doc. (4 years)20140.564
Cites / Doc. (4 years)20150.536
Cites / Doc. (4 years)20160.548
Cites / Doc. (3 years)19990.338
Cites / Doc. (3 years)20000.228
Cites / Doc. (3 years)20010.213
Cites / Doc. (3 years)20020.217
Cites / Doc. (3 years)20030.249
Cites / Doc. (3 years)20040.457
Cites / Doc. (3 years)20050.400
Cites / Doc. (3 years)20060.426
Cites / Doc. (3 years)20070.397
Cites / Doc. (3 years)20080.524
Cites / Doc. (3 years)20090.569
Cites / Doc. (3 years)20100.609
Cites / Doc. (3 years)20110.830
Cites / Doc. (3 years)20120.595
Cites / Doc. (3 years)20130.509
Cites / Doc. (3 years)20140.487
Cites / Doc. (3 years)20150.521
Cites / Doc. (3 years)20160.570
Cites / Doc. (2 years)19990.266
Cites / Doc. (2 years)20000.215
Cites / Doc. (2 years)20010.161
Cites / Doc. (2 years)20020.184
Cites / Doc. (2 years)20030.240
Cites / Doc. (2 years)20040.425
Cites / Doc. (2 years)20050.338
Cites / Doc. (2 years)20060.370
Cites / Doc. (2 years)20070.328
Cites / Doc. (2 years)20080.477
Cites / Doc. (2 years)20090.527
Cites / Doc. (2 years)20100.629
Cites / Doc. (2 years)20110.829
Cites / Doc. (2 years)20120.503
Cites / Doc. (2 years)20130.404
Cites / Doc. (2 years)20140.432
Cites / Doc. (2 years)20150.509
Cites / Doc. (2 years)20160.479
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 Cites19998
Self Cites200013
Self Cites200111
Self Cites20029
Self Cites200310
Self Cites200423
Self Cites200513
Self Cites200619
Self Cites200722
Self Cites200814
Self Cites200918
Self Cites201021
Self Cites201130
Self Cites201222
Self Cites201327
Self Cites201440
Self Cites201524
Self Cites201640
Total Cites199945
Total Cites200041
Total Cites200144
Total Cites200245
Total Cites200348
Total Cites200484
Total Cites200576
Total Cites200681
Total Cites200781
Total Cites2008110
Total Cites2009128
Total Cites2010143
Total Cites2011191
Total Cites2012138
Total Cites2013113
Total Cites2014115
Total Cites2015159
Total Cites2016159
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 document19990.278
External Cites per document20000.156
External Cites per document20010.159
External Cites per document20020.174
External Cites per document20030.197
External Cites per document20040.332
External Cites per document20050.332
External Cites per document20060.326
External Cites per document20070.289
External Cites per document20080.457
External Cites per document20090.489
External Cites per document20100.519
External Cites per document20110.700
External Cites per document20120.500
External Cites per document20130.387
External Cites per document20140.318
External Cites per document20150.443
External Cites per document20160.427
Cites per document19990.338
Cites per document20000.228
Cites per document20010.213
Cites per document20020.217
Cites per document20030.249
Cites per document20040.457
Cites per document20050.400
Cites per document20060.426
Cites per document20070.397
Cites per document20080.524
Cites per document20090.569
Cites per document20100.609
Cites per document20110.830
Cites per document20120.595
Cites per document20130.509
Cites per document20140.487
Cites per document20150.521
Cites per document20160.570
% 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 documents19990
Non-citable documents20000
Non-citable documents20010
Non-citable documents20020
Non-citable documents20030
Non-citable documents20041
Non-citable documents20051
Non-citable documents20061
Non-citable documents20072
Non-citable documents20082
Non-citable documents20093
Non-citable documents20102
Non-citable documents20113
Non-citable documents20127
Non-citable documents20137
Non-citable documents201413
Non-citable documents201511
Non-citable documents201612
Citable documents1999133
Citable documents2000180
Citable documents2001207
Citable documents2002207
Citable documents2003193
Citable documents2004184
Citable documents2005190
Citable documents2006190
Citable documents2007204
Citable documents2008210
Citable documents2009225
Citable documents2010235
Citable documents2011230
Citable documents2012232
Citable documents2013222
Citable documents2014236
Citable documents2015305
Citable documents2016279
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 documents1999109
Uncited documents2000146
Uncited documents2001174
Uncited documents2002171
Uncited documents2003152
Uncited documents2004125
Uncited documents2005145
Uncited documents2006142
Uncited documents2007150
Uncited documents2008149
Uncited documents2009150
Uncited documents2010154
Uncited documents2011149
Uncited documents2012158
Uncited documents2013154
Uncited documents2014164
Uncited documents2015215
Uncited documents2016194
Cited documents199924
Cited documents200034
Cited documents200133
Cited documents200236
Cited documents200341
Cited documents200460
Cited documents200546
Cited documents200649
Cited documents200756
Cited documents200863
Cited documents200978
Cited documents201083
Cited documents201184
Cited documents201281
Cited documents201375
Cited documents201485
Cited documents2015101
Cited documents201697
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