Mathematical Sciences Classification System

20Nxx - Other generalizations of groups

  • 20N02
    Sets with a single binary operation (groupoids)
  • 20N05
    Loops, quasigroups [See also 05Bxx]
  • 20N10
    Ternary systems (heaps, semiheaps, heapoids, etc.)
  • 20N15
    $n$-ary systems $(n\ge 3)$
  • 20N20
    Hypergroups
  • 20N25
    Fuzzy groups [See also 03E72]
  • 20N99
    None of the above, but in this section

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