This seems to be a french word that is used in English language mathematical papers. It seems to mean something like "unambiguous." What is its technical definition?
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Univoque means singlevalued, as opposed to multivalued (multivoque). As Yemon Choi explained, biunivoque means bijective (i.e. singlevalued both ways). 


So a univoque map is just a function, as opposed to a multivoque map, a relation. 

