http://www.saber.ula.ve/handle/123456789/31020 2009 Tue, 09 Jun 2026 12:00:33 GMT 2026-06-09T12:00:33Z http://www.saber.ula.ve/handle/123456789/31021 Almost preenvelopes of commutative rings Parra, Carlos; Parra, Rafael; Rada, Juan We study almost F-preenvelopes in the category of rings, for a significative class F of commutative rings. We completely identify those rings which have an almost F-preenvelope when F is the class of fields, semisimple rings, integer domains and local rings. We show that rings with Krull dimension zero have (almost) V-preenvelopes, where V is the class of von Neumann regular rings. Sun, 16 May 2010 23:02:20 GMT http://www.saber.ula.ve/handle/123456789/31021 2010-05-16T23:02:20Z