Mapping/Preimage under a mapping/Definition
Preimage of a set
Let and be sets and let
be a mapping. For a subset , we call
the preimage of under . For an subset with one element, we call
also the preimage of .
Let and be sets and let
be a mapping. For a subset , we call
the preimage of under . For an subset with one element, we call
also the preimage of .