Mathematical Sciences Classification System

18Bxx - Special categories

  • 2
    18B05
    Category of sets, characterizations [See also 03-XX]
  • 1
    18B10
    Category of relations, additive relations
  • 18B15
    Embedding theorems, universal categories [See also 18E20]
  • 1
    18B20
    Categories of machines, automata, operative categories [See also 03D05, 68Qxx]
  • 10
    18B25
    Topoi [See also 03G30]
  • 5
    18B30
    Categories of topological spaces and continuous mappings [See also 54-XX]
  • 1
    18B35
    Preorders, orders and lattices (viewed as categories) [See also 06-XX]
  • 3
    18B40
    Groupoids, semigroupoids, semigroups, groups (viewed as categories) [See also 20Axx, 20L05, 20Mxx]
  • 18B99
    None of the above, but in this section

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