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Mirrors > Home > ILE Home > Th. List > 2rexbiia | Unicode version |
Description: Inference adding two restricted existential quantifiers to both sides of an equivalence. (Contributed by NM, 1-Aug-2004.) |
Ref | Expression |
---|---|
2rexbiia.1 |
Ref | Expression |
---|---|
2rexbiia |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | 2rexbiia.1 | . . 3 | |
2 | 1 | rexbidva 2454 | . 2 |
3 | 2 | rexbiia 2472 | 1 |
Colors of variables: wff set class |
Syntax hints: wi 4 wa 103 wb 104 wcel 2128 wrex 2436 |
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 1427 ax-gen 1429 ax-ie1 1473 ax-ie2 1474 ax-4 1490 ax-17 1506 ax-ial 1514 |
This theorem depends on definitions: df-bi 116 df-nf 1441 df-rex 2441 |
This theorem is referenced by: elq 9531 cnref1o 9559 |
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