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Mirrors > Home > ILE Home > Th. List > onntri24 | Unicode version |
Description: Double negated ordinal trichotomy. (Contributed by James E. Hanson and Jim Kingdon, 2-Aug-2024.) |
Ref | Expression |
---|---|
onntri24 |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | nnral 2477 |
. 2
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2 | nnral 2477 |
. . 3
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3 | 2 | ralimi 2550 |
. 2
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4 | 1, 3 | syl 14 |
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 615 ax-in2 616 ax-5 1457 ax-gen 1459 ax-ie1 1503 ax-ie2 1504 ax-4 1520 ax-17 1536 ax-ial 1544 |
This theorem depends on definitions: df-bi 117 df-tru 1366 df-fal 1369 df-nf 1471 df-ral 2470 df-rex 2471 |
This theorem is referenced by: onntri2or 7258 |
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