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Mirrors > Home > ILE Home > Th. List > xchnxbir | Unicode version |
Description: Replacement of a subexpression by an equivalent one. (Contributed by Wolf Lammen, 27-Sep-2014.) |
Ref | Expression |
---|---|
xchnxbir.1 |
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xchnxbir.2 |
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Ref | Expression |
---|---|
xchnxbir |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | xchnxbir.1 |
. 2
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2 | xchnxbir.2 |
. . 3
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3 | 2 | bicomi 131 |
. 2
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4 | 1, 3 | xchnxbi 670 |
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 105 ax-ia2 106 ax-ia3 107 ax-in1 604 ax-in2 605 |
This theorem depends on definitions: df-bi 116 |
This theorem is referenced by: 3ioran 978 truxortru 1398 truxorfal 1399 falxortru 1400 falxorfal 1401 intirr 4933 hashunlem 10582 |
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