Geodesic
Ordering D-classes and computing Schein rank is hard.
Semigroup forum, Tome 44 (1992) no. 1, pp. 373-375 Cet article a éte moissonné depuis la source European Digital Mathematics Library

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Mots-clés : semigroup of binary relations, principal ideal, NP-complete, Schein rank, binary matrix, rectangular binary relation, Boolean sum 
@article{SF_1992__44_1_135161,
     author = {G. Markowsky},
     title = {Ordering {D-classes} and computing {Schein} rank is hard.},
     journal = {Semigroup forum},
     pages = {373--375},
     year = {1992},
     volume = {44},
     number = {1},
     zbl = {0760.20018},
     url = {http://geodesic.mathdoc.fr/item/SF_1992__44_1_135161/}
}
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VL  - 44
IS  - 1
UR  - http://geodesic.mathdoc.fr/item/SF_1992__44_1_135161/
ID  - SF_1992__44_1_135161
ER  - 
%0 Journal Article
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%J Semigroup forum
%D 1992
%P 373-375
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%N 1
%U http://geodesic.mathdoc.fr/item/SF_1992__44_1_135161/
%F SF_1992__44_1_135161
G. Markowsky. Ordering D-classes and computing Schein rank is hard.. Semigroup forum, Tome 44 (1992) no. 1, pp. 373-375. http://geodesic.mathdoc.fr/item/SF_1992__44_1_135161/