20-XX |
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Group theory and generalizations |
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20Mxx |
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Semigroups |
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20M05 |
Free semigroups, generators and relations, word problems [See also 03D40, 08A50, 20F10] |
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20M07 |
Varieties and pseudovarieties of semigroups |
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20M10 |
General structure theory for semigroups |
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20M11 |
Radical theory for semigroups |
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20M12 |
Ideal theory for semigroups |
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20M13 |
Arithmetic theory of semigroups |
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20M14 |
Commutative semigroups |
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20M15 |
Mappings of semigroups |
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20M17 |
Regular semigroups |
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20M18 |
Inverse semigroups |
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20M19 |
Orthodox semigroups |
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20M20 |
Semigroups of transformations, relations, partitions, etc. [See also 47D03, 47H20, 54H15] |
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20M25 |
Semigroup rings, multiplicative semigroups of rings [See also 16S36, 16Y60] |
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20M30 |
Representation of semigroups; actions of semigroups on sets |
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20M32 |
Algebraic monoids |
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20M35 |
Semigroups in automata theory, linguistics, etc. [See also 03D05, 68Q70, 68T50] |
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20M50 |
Connections of semigroups with homological algebra and category theory |
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20M75 |
Generalizations of semigroups |
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20M99 |
None of the above, but in this section |