Geodesic
Closure operators on languages and binary relations.
Semigroup forum, Tome 21 (1980), pp. 91-92.

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Mots-clés : binary relations, mirror language 
@article{SF_1980__21_134438,
     author = {J. Anderson},
     title = {Closure operators on languages and binary relations.},
     journal = {Semigroup forum},
     pages = {91--92},
     publisher = {mathdoc},
     volume = {21},
     year = {1980},
     zbl = {0451.20059},
     url = {http://geodesic.mathdoc.fr/item/SF_1980__21_134438/}
}
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J. Anderson. Closure operators on languages and binary relations.. Semigroup forum, Tome 21 (1980), pp. 91-92. http://geodesic.mathdoc.fr/item/SF_1980__21_134438/