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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 |
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Ref | Expression |
---|---|
2rexbii |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | ralbii.1 |
. . 3
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2 | 1 | rexbii 2396 |
. 2
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3 | 2 | rexbii 2396 |
1
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Colors of variables: wff set class |
Syntax hints: ![]() ![]() |
This theorem was proved from axioms: ax-1 5 ax-2 6 ax-mp 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 ax-5 1388 ax-gen 1390 ax-ie1 1434 ax-ie2 1435 ax-4 1452 ax-17 1471 ax-ial 1479 |
This theorem depends on definitions: df-bi 116 df-tru 1299 df-nf 1402 df-rex 2376 |
This theorem is referenced by: 3reeanv 2551 4fvwrd4 9700 |
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