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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 1421 |
. . 3
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2 | 1 | albii 1404 |
. 2
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3 | 19.26 1415 |
. 2
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4 | 2, 3 | bitri 182 |
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 104 ax-ia2 105 ax-ia3 106 ax-5 1381 ax-gen 1383 |
This theorem depends on definitions: df-bi 115 |
This theorem is referenced by: sbnf2 1905 eqopab2b 4106 eqrel 4527 eqrelrel 4539 eqoprab2b 5707 |
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