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Mirrors > Home > ILE Home > Th. List > 2rexbii | Unicode version |
Description: Inference adding two restricted existential quantifiers to both sides of an equivalence. (Contributed by NM, 11-Nov-1995.) |
Ref | Expression |
---|---|
ralbii.1 |
Ref | Expression |
---|---|
2rexbii |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | ralbii.1 | . . 3 | |
2 | 1 | rexbii 2331 | . 2 |
3 | 2 | rexbii 2331 | 1 |
Colors of variables: wff set class |
Syntax hints: wb 98 wrex 2307 |
This theorem was proved from axioms: ax-1 5 ax-2 6 ax-mp 7 ax-ia1 99 ax-ia2 100 ax-ia3 101 ax-5 1336 ax-gen 1338 ax-ie1 1382 ax-ie2 1383 ax-4 1400 ax-17 1419 ax-ial 1427 |
This theorem depends on definitions: df-bi 110 df-tru 1246 df-nf 1350 df-rex 2312 |
This theorem is referenced by: 3reeanv 2480 4fvwrd4 8997 |
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