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Mirrors > Home > MPE Home > Th. List > xorneg1 | Structured version Unicode version |
Description: ![]() |
Ref | Expression |
---|---|
xorneg1 |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | df-xor 1352 |
. 2
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2 | nbbn 358 |
. . 3
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3 | 2 | con2bii 332 |
. 2
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4 | xnor 1353 |
. 2
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5 | 1, 3, 4 | 3bitr2i 273 |
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 185 df-xor 1352 |
This theorem is referenced by: xorneg2 1362 xorneg 1363 |
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