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Mirrors > Home > ILE Home > Th. List > frel | Unicode version |
Description: A mapping is a relation. (Contributed by NM, 3-Aug-1994.) |
Ref | Expression |
---|---|
frel |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | ffn 5046 | . 2 | |
2 | fnrel 4997 | . 2 | |
3 | 1, 2 | syl 14 | 1 |
Colors of variables: wff set class |
Syntax hints: wi 4 wrel 4350 wfn 4897 wf 4898 |
This theorem was proved from axioms: ax-1 5 ax-2 6 ax-mp 7 ax-ia1 99 |
This theorem depends on definitions: df-bi 110 df-fun 4904 df-fn 4905 df-f 4906 |
This theorem is referenced by: fssxp 5058 fsn 5335 eluzel2 8478 |
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