http://www.saber.ula.ve/handle/123456789/31020 2009 2026-05-27T17:19:18Z 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. 2010-05-16T23:02:20Z