Mathematica Slovaca ( IF 0.654 ) Pub Date : 2020-09-27 , DOI: 10.1515/ms-2017-0428
Mircea Cimpoeaş

We fix z0 ∈ ℂ and a field 𝔽 with ℂ ⊂ 𝔽 ⊂ 𝓜z0 := the field of germs of meromorphic functions at z0. We fix f1, …, fr ∈ 𝓜z0 and we consider the 𝔽-algebras S := 𝔽[f1, …, fr] and $S¯:=F[f1±1,…,fr±1].$ We present the general properties of the semigroup rings

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