Generalized GCD rings IV

All rings are assumed to be commutative with identity. In this paper, we give a sufficient condition for a locally GCD-domain to be a Prufer domain. We also introduce two new classes of rings that are closely related to almost generalized GCD (AGGCD)-domains and almost Prufer domains, namely AGGCD-rings and almost flat rings. We show that the theories of these rings resemble those of AGGCD-domains and almost Prufer domains.