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Related theorems Unicode version |
| Description: A mapping is a relation. |
| Ref | Expression |
|---|---|
| frel |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | ffn 2752 |
. 2
| |
| 2 | fnrel 2722 |
. 2
| |
| 3 | 1, 2 | syl 12 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem is referenced by: fssxp 2761 fcoi2 2766 fsn 2895 mapsn 3269 |
| This theorem was proved from axioms: ax-1 3 ax-2 4 ax-3 5 ax-mp 6 |
| This theorem depends on definitions: df-bi 128 df-an 198 df-fun 2432 df-fn 2433 df-f 2434 |