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Mirrors > Home > NFE Home > Th. List > f1f | Unicode version |
Description: A one-to-one mapping is a mapping. (Contributed by set.mm contributors, 31-Dec-1996.) |
Ref | Expression |
---|---|
f1f |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | df-f1 4792 | . 2 | |
2 | 1 | simplbi 446 | 1 |
Colors of variables: wff setvar class |
Syntax hints: wi 4 ccnv 4771 wfun 4775 wf 4777 wf1 4778 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 |
This theorem depends on definitions: df-bi 177 df-an 360 df-f1 4792 |
This theorem is referenced by: f1fn 5259 f1ss 5262 f1of 5287 dff1o5 5295 fun11iun 5305 dflec3 6221 |
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