ODIUM
发表于 2025-3-23 10:53:17
Veränderungen wagen: Jetzt geht es los!Group coextensions were developed independently by Grillet and Leech for semigroups in general. They yield precise constructions of complete commutative semigroups in terms of abelian groups and group-free semigroups. This leads to the semigroup cohomology which is studied in the last chapters of this book.
nepotism
发表于 2025-3-23 16:58:55
Partizipation von Jugendlichen,Commutative semigroup cohomology assigns abelian groups ..(., G)to a commutative semigroup . and an abelian group valued functor G on ..
Spina-Bifida
发表于 2025-3-23 20:04:06
,Entwicklung für die Soziale Arbeit,Like other cohomology theories, commutative semigroup cohomology gives rise to the following problem:
帽子
发表于 2025-3-24 00:45:47
Elementary PropertiesThis chapter contains basic first properties of commutative semigroups: idempotents, subsemigroups, homomorphisms and congruences, ideals, ideal extensions, ℋ-classes and Schützenberger groups, free commutative semigroups, presentations. It is written for readers who are not familiar with semigroups and can therefore expect a few surprises.
ASSET
发表于 2025-3-24 06:26:29
Cancellative SemigroupsOne of the oldest results in semigroup theory embeds cancellative commutative semigroups into abelian groups, by a construction which also completes ℕ into ℤ and embeds integral domains into fields.
MOTTO
发表于 2025-3-24 08:23:50
Group CoextensionsGroup coextensions were developed independently by Grillet and Leech for semigroups in general. They yield precise constructions of complete commutative semigroups in terms of abelian groups and group-free semigroups. This leads to the semigroup cohomology which is studied in the last chapters of this book.
ATP861
发表于 2025-3-24 10:54:46
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NAIVE
发表于 2025-3-24 17:16:00
Semigroups with Zero CohomologyLike other cohomology theories, commutative semigroup cohomology gives rise to the following problem:
易弯曲
发表于 2025-3-24 19:02:46
https://doi.org/10.1007/978-1-4757-3389-1DEX; Finite; Lattice; cohomology; commutative property; congruence; group; homology; semigroup; set
小样他闲聊
发表于 2025-3-24 23:26:59
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