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Mirrors > Home > ILE Home > Th. List > freq1 | Unicode version |
Description: Equality theorem for the well-founded predicate. (Contributed by NM, 9-Mar-1997.) |
Ref | Expression |
---|---|
freq1 |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | frforeq1 4235 | . . 3 FrFor FrFor | |
2 | 1 | albidv 1780 | . 2 FrFor FrFor |
3 | df-frind 4224 | . 2 FrFor | |
4 | df-frind 4224 | . 2 FrFor | |
5 | 2, 3, 4 | 3bitr4g 222 | 1 |
Colors of variables: wff set class |
Syntax hints: wi 4 wb 104 wal 1314 wceq 1316 FrFor wfrfor 4219 wfr 4220 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 ax-5 1408 ax-gen 1410 ax-ie1 1454 ax-ie2 1455 ax-4 1472 ax-17 1491 ax-ial 1499 ax-ext 2099 |
This theorem depends on definitions: df-bi 116 df-nf 1422 df-cleq 2110 df-clel 2113 df-ral 2398 df-br 3900 df-frfor 4223 df-frind 4224 |
This theorem is referenced by: weeq1 4248 |
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