On di-injective T0-quasi-metric spaces
Agyingi, Collins Amburo
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In this article it is shown that every q-hyperconvex T0-quasi-metric space is di-injective without appealing to Zorn's lemma. We also demonstrate that QXas constructed by Kemajou et al. and Q(X)(the space of all Kat?tov function pairs on X) are di-injective. Moreover we prove that di-injective T0-quasi-metric spaces do not contain proper essential extensions. Among other results, we state a number of ways in which thedi-injective hull can be characterized.