Sotto-quasi-anelli di quasi anelli di Fröhlich
Received: 21 Maggio 1999
Mathematics Subject Classification: 16Y30
Abstract: We consider the near-rings of formal power series of . Subsets of they, constituted by elements in which certain classes of coefficients are null, are demonstrated to be subnear- rings; in the case of Cartan’s near-rings, for some of they modifications in the sense of the «Dickson process» () are possible.