О ВНУТРЕННЕЙ ХАРАКТЕРИЗАЦИИ АБСОЛЮТНЫХ РЕТРАКТОВ

Abstract

The notion of the mixer was introdused by J. van Mill and M. van de Vel (see [1]). They tried to yield the internal characterization of compact AR's by means of a mixer. It is the moot point till now. The notion of iterated mixer considered in this paper, and it is showed that there is an internal characterization of AR-spaces by means of iterated mixer.