On the Notion of Elementary Description

Abstract

In this paper, we deal with systems S including set theory. The concept of an elementary description was introduced in [11] as an auxiliary notion. Such a notion occurs to be necessary to define risk function and risk-type description, that will be subject of the next part of this work. The present paper is a continuation of our research in [13], [14] and [15]; the reader will find all relevant notions in the quoted works.