“…According to the criterion from 1.3.2, this a-preimage exists and is a realizing asL-preimage of the crLextension u: C ~-+ C ~'. This preimage was examined in [32,34,35,39,46,48,49,76]. Since the hyperstonean preimage is defined via C t', Fremlin, in his review of the monograph [59], raised the problem of the ez.istence of a direct topological construction of the hyperstonean preimage T ~ hT out closed sets and, correspondingly, zero-sets of a space T. A function f: T ~ R will be called an A-function if for any n there exists a finite covering {A,,i I i} C A of the space T such that w(f, …”