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Mirrors > Home > NFE Home > Th. List > nanbi1 | Unicode version |
Description: Introduce a right anti-conjunct to both sides of a logical equivalence. (Contributed by SF, 2-Jan-2018.) |
Ref | Expression |
---|---|
nanbi1 |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | anbi1 687 |
. . 3
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2 | 1 | notbid 285 |
. 2
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3 | df-nan 1288 |
. 2
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4 | df-nan 1288 |
. 2
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5 | 2, 3, 4 | 3bitr4g 279 |
1
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Colors of variables: wff setvar class |
Syntax hints: ![]() ![]() ![]() ![]() ![]() |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 |
This theorem depends on definitions: df-bi 177 df-an 360 df-nan 1288 |
This theorem is referenced by: nanbi2 1296 nanbi12 1297 nanbi1i 1298 nanbi1d 1301 |
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