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Mirrors > Home > ILE Home > Th. List > f1rel | Unicode version |
Description: A one-to-one onto mapping is a relation. (Contributed by NM, 8-Mar-2014.) |
Ref | Expression |
---|---|
f1rel |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | f1fn 5325 | . 2 | |
2 | fnrel 5216 | . 2 | |
3 | 1, 2 | syl 14 | 1 |
Colors of variables: wff set class |
Syntax hints: wi 4 wrel 4539 wfn 5113 wf1 5115 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 105 |
This theorem depends on definitions: df-bi 116 df-fun 5120 df-fn 5121 df-f 5122 df-f1 5123 |
This theorem is referenced by: f1dmvrnfibi 6825 |
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