Unified theories applied to cosmology suffer generically from a problem of predicting time dependent gauge coupling constants, which might be in conflict with observed no time-variability. A remedy is proposed by taking advantage of a rather unexpected but highly nontrivial behavior of the scalar field that relaxes the cosmological constant. The importance of-probing the possible time variation of the fine-structure constant with improved accuracy is emphasized. 1. Introduction
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Fujii et al. (1994) studied this question.