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Mirrors > Home > ILE Home > Th. List > xchbinx | Unicode version |
Description: Replacement of a subexpression by an equivalent one. (Contributed by Wolf Lammen, 27-Sep-2014.) |
Ref | Expression |
---|---|
xchbinx.1 |
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xchbinx.2 |
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Ref | Expression |
---|---|
xchbinx |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | xchbinx.1 |
. 2
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2 | xchbinx.2 |
. . 3
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3 | 2 | notbii 668 |
. 2
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4 | 1, 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-in1 614 ax-in2 615 |
This theorem depends on definitions: df-bi 117 |
This theorem is referenced by: xchbinxr 683 necon3abii 2383 elirr 4537 en2lp 4550 dm0rn0 4840 |
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