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< 20Kxx | 20-XX | 20Mxx >
20-XX Group theory and generalizations
20Lxx Groupoids (i.e. small categories in which all morphisms are isomorphisms) {For sets with a single binary operation, see 20N02; for topological groupoids, see 22A22, 58H05}
20L05   Groupoids (i.e. small categories in which all morphisms are isomorphisms) {For sets with a single binary operation, see 20N02; for topological groupoids, see 22A22, 58H05}
20L99   None of the above, but in this section
< 20Kxx | 20-XX | 20Mxx >
 
 
American Mathematical Society