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Mirrors > Home > ILE Home > Th. List > f1dm | Unicode version |
Description: The domain of a one-to-one mapping. (Contributed by NM, 8-Mar-2014.) |
Ref | Expression |
---|---|
f1dm |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | f1fn 5093 | . 2 | |
2 | fndm 4998 | . 2 | |
3 | 1, 2 | syl 14 | 1 |
Colors of variables: wff set class |
Syntax hints: wi 4 wceq 1243 cdm 4345 wfn 4897 wf1 4899 |
This theorem was proved from axioms: ax-1 5 ax-2 6 ax-mp 7 ax-ia1 99 ax-ia2 100 |
This theorem depends on definitions: df-bi 110 df-fn 4905 df-f 4906 df-f1 4907 |
This theorem is referenced by: fun11iun 5147 tposf12 5884 |
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