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{{about|the mathematical concept of Graph Algebras|"Graph Algebra" as used in the social sciences|Graph algebra (social sciences)}}
{{Use shortened footnotes|date=May 2021}}
In [[mathematics]], especially in the fields of [[universal algebra]] and [[graph theory]], a '''graph algebra''' is a way of giving a [[directed graph]] an [[algebraic structure]]. It was introduced by McNulty and Shallon,{{
== Definition ==
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== Applications ==
This notion has made it possible to use the methods of graph theory in universal algebra and several other directions of discrete mathematics and computer science. Graph algebras have been used, for example, in constructions concerning dualities,{{
tree languages and [[tree automata]],{{
== See also ==
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* [[Incidence algebra]]
* [[Path algebra]]
==Citations==
{{Reflist|20em}}
==Works cited==
{{refbegin|35em}}
*{{Cite journal | title = Dualizability and graph algebras
| last1 = Davey | first1 = Brian A.
| last2 = Idziak | first2 = Pawel M.
| last3 = Lampe | first3 = William A.
| last4 = McNulty | first4 = George F.
| journal = [[Discrete Mathematics (journal)|Discrete Mathematics]]
| year = 2000 | volume = 214 | issue = 1 | pages = 145–172
| doi = 10.1016/S0012-365X(99)00225-3 | issn = 0012-365X | mr = 1743633
}}
*{{Cite journal | title = Finite bases for flat graph algebras
| last = Delić | first = Dejan
| journal = Journal of Algebra
| year = 2001 | volume = 246 | issue = 1 | pages = 453–469
| doi = 10.1006/jabr.2001.8947 | issn = 0021-8693 | mr = 1872631
| doi-access = free
}}
*{{Cite journal | title = Languages recognized by two-sided automata of graphs
| last1 = Kelarev | first1 = A.V.
| last2 = Miller | first2 = M.
| last3 = Sokratova | first3 = O.V.
| journal = Proc. Estonian Akademy of Science
| year = 2005 | volume = 54 | issue = 1 | pages = 46–54
| issn = 1736-6046 | mr = 2126358
}}
*{{Cite journal | title = Directed graphs and syntactic algebras of tree languages
| last1 = Kelarev | first1 = A.V.
| last2 = Sokratova | first2 = O.V.
| journal = J. Automata, Languages & Combinatorics
| year = 2001 | volume = 6 | issue = 3 | pages = 305–311
| issn = 1430-189X | mr = 1879773
}}
*{{Cite journal | title = On congruences of automata defined by directed graphs
| last1 = Kelarev | first1 = A.V.
| last2 = Sokratova | first2 = O.V.
| journal = Theoretical Computer Science
| year = 2003 | volume = 301 | issue = 1–3 | pages = 31–43
| url = https://eprints.utas.edu.au/157/1/congruences.pdf
| doi = 10.1016/S0304-3975(02)00544-3 | issn = 0304-3975 | mr = 1975219
}}
*{{Cite journal | title = Graph algebras which admit only discrete topologies
| last = Lee | first = S.-M.
| journal = Congr. Numer
| year = 1988 | volume = 64 | pages = 147–156
| issn = 1736-6046 | mr = 0988675
}}
*{{Cite journal | title = Simple graph algebras and simple rings
| last = Lee | first = S.-M.
| journal = Southeast Asian Bull. Math
| year = 1991 | volume = 15 | issue = 2 | pages = 117–121
| issn = 0129-2021 | mr = 1145431
}}
*{{Cite book| chapter = Inherently nonfinitely based finite algebras
| last1 = McNulty | first1 = George F.
| last2 = Shallon | first2 = Caroline R.
| year = 1983
| title = Universal algebra and lattice theory (Puebla, 1982)
| editor1-last = Freese | editor1-first = Ralph S.
| editor2-last = Garcia | editor2-first = Octavio C.
| publisher = [[Springer-Verlag]] | ___location = Berlin, New York City
| volume = 1004 | series = Lecture Notes in Math.
| at = [https://archive.org/details/universalalgebra0000unse/page/206 pp. 206–231]
| url = https://archive.org/details/universalalgebra0000unse | via = [[Internet Archive]]
| doi = 10.1007/BFb0063439 | hdl = 10338.dmlcz/102157 | isbn = 978-354012329-3 | mr = 716184
| hdl-access = free
}}
*{{Cite journal | title = On the variety generated by Murskiĭ's algebra
| last = Oates-Williams | first = Sheila
| author-link = Sheila Oates Williams
| journal = Algebra Universalis
| year = 1984 | volume = 18 | issue = 2 | pages = 175–177
| doi = 10.1007/BF01198526 | issn = 0002-5240 | mr = 743465 | s2cid = 121598599
}}
*{{Cite journal | title = The equational logic for graph algebras
| last = Pöschel | first = R.
| journal = Z. Math. Logik Grundlag. Math
| year = 1989 | volume = 35 | issue = 3 | pages = 273–282
| doi = 10.1002/malq.19890350311 | mr = 1000970
}}
{{refend}}
{{Reflist|30em}}
==Further reading==
{{refbegin}}
*{{Cite book| title = Graph Algebras and Automata
| last = Kelarev | first = A.V. | year = 2003
| publisher = [[Marcel Dekker]] | place = New York City
| url = https://archive.org/details/graphalgebrasaut0000kela | url-access = registration | via = [[Internet Archive]]
| isbn = 0-8247-4708-9 | mr = 2064147
| ref = none
}}
*{{cite journal | title = Subvarieties of varieties generated by graph algebras
| last1 = Kiss | first1 = E.W.
| last2 = Pöschel | first2 = R.
| last3 = Pröhle | first3 = P.
| journal = Acta Sci. Math
| year = 1990 | volume = 54 | issue = 1–2 | pages = 57–75
| mr = 1073419
| ref = none
}}
*{{Cite book| title = Graph algebras
| last = Raeburn | first = Iain | year = 2005
| publisher = [[American Mathematical Society]]
| isbn = 978-082183660-6
| ref = none
}}
{{refend}}
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