Unique Factorization in Power Series Rings.
Si studiano gli spazi di Finsler ricorrenti in relazione alla derivazione covariante di Berwald.
Negli spazi speciali di Kawaguchi questi ha definito trasformazioni proiettive: gli Autori ne studiano le trasformazioni infinitesime.
In this paper we introduce cone 2-metric space and prove some fixed point theorems of a contractive mapping on a cone 2-metric space.
We study McCoy’s theorem to the skew Hurwitz series ring for some different classes of rings such as: semiprime rings, APP rings and skew Hurwitz serieswise quasi-Armendariz rings. Moreover, we establish an equivalence relationship between a right zip ring and its skew Hurwitz series ring in case when a ring satisfies McCoy’s theorem of skew Hurwitz series.
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