Recently, the algebraic theory of MV -algebras is intensively studied. In this paper, we extend the concept of derivation of $MV$-algebras and we give someillustrative examples. Moreover, as a generalization of derivations of $MV$ -algebraswe introduce the notion of $f$-derivations and $(f; g)$-derivations of $MV$-algebras.Also, we investigate some properties of them.

This article presents an analysis of the reliability power grid using data on failure rate medium voltage (MV) from last five years. The state was based provided by operator. purpose this is to analyze assessment connections various analytical methods, a simulation model and indicators. performed defined categories outages in terms their duration. made it possible determine energy quality indic...

In this paper we study an outer measure on MV -algebras. In Section 1 the definition of MV -algebra and Mundici theorem are remind. In Section 2 there is defined an outer measure, measurable elements and there is proved Choquet lema for this structure. In conclusion some properties of measurable elements are resumed.