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Mirrors > Home > ILE Home > Th. List > 2albiim | Unicode version |
Description: Split a biconditional and distribute 2 quantifiers. (Contributed by NM, 3-Feb-2005.) |
Ref | Expression |
---|---|
2albiim |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | albiim 1487 |
. . 3
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2 | 1 | albii 1470 |
. 2
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3 | 19.26 1481 |
. 2
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4 | 2, 3 | bitri 184 |
1
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Colors of variables: wff set class |
Syntax hints: ![]() ![]() ![]() ![]() |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-5 1447 ax-gen 1449 |
This theorem depends on definitions: df-bi 117 |
This theorem is referenced by: sbnf2 1981 eqopab2b 4278 eqrel 4714 eqrelrel 4726 eqoprab2b 5929 |
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