zcf
Zcf is a short string that, in isolation, does not correspond to a single widely recognized concept. Unlike ZFC, the standard abbreviation for Zermelo–Fraenkel set theory with the axiom of choice, zcf does not designate a universally accepted theory in mainstream mathematics or science. In practice, the lowercase form is most often encountered as a typographical variant, a label without a standardized meaning, or a domain-specific acronym that varies between communities.
Because capitalization matters for acronyms, a capitalized ZCF might be used for a particular organization, project
In specialized fields, zcf may have an explicit meaning defined by a local glossary or documentation, but
Relation to related terms: the closest well-known term is ZFC (Zermelo–Fraenkel set theory with the axiom of