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20Mxx Semigroups {Info & Stats}

  • 20M05 Free semigroups, generators and relations, word problems [See also 03D40, 08A50, 20F10]
  • 20M07 Varieties and pseudovarieties of semigroups
  • 20M10 General structure theory
  • 20M11 Radical theory
  • 20M12 Ideal theory
  • 20M13 Arithmetic theory of monoids
  • 20M14 Commutative semigroups
  • 20M15 Mappings of semigroups
  • 20M17 Regular semigroups
  • 20M18 Inverse semigroups
  • 20M19 Orthodox semigroups
  • 20M20 Semigroups of transformations, etc. [See also 47D03, 47H20, 54H15]
  • 20M25 Semigroup rings, multiplicative semigroups of rings [See also 16S36, 16Y60]
  • 20M30 Representation of semigroups; actions of semigroups on sets
  • 20M32 Algebraic monoids
  • 20M35 Semigroups in automata theory, linguistics, etc. [See also 03D05, 68Q70, 68T50]
  • 20M50 Connections of semigroups with homological algebra and category theory
  • 20M99 None of the above, but in this section