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Mirrors > Home > ILE Home > Th. List > Mathboxes > decidr | Unicode version |
Description: Sufficient condition for being decidable in another class. (Contributed by BJ, 19-Feb-2022.) |
Ref | Expression |
---|---|
decidr.1 |
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Ref | Expression |
---|---|
decidr |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | decidr.1 |
. . . 4
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2 | df-dc 779 |
. . . 4
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3 | 1, 2 | syl6ibr 160 |
. . 3
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4 | 3 | alrimiv 1799 |
. 2
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5 | df-dcin 11051 |
. . 3
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6 | df-ral 2360 |
. . 3
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7 | 5, 6 | bitri 182 |
. 2
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8 | 4, 7 | sylibr 132 |
1
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Colors of variables: wff set class |
Syntax hints: ![]() ![]() ![]() ![]() ![]() ![]() |
This theorem was proved from axioms: ax-1 5 ax-2 6 ax-mp 7 ax-ia1 104 ax-ia2 105 ax-ia3 106 ax-5 1379 ax-gen 1381 ax-17 1462 |
This theorem depends on definitions: df-bi 115 df-dc 779 df-ral 2360 df-dcin 11051 |
This theorem is referenced by: decidin 11054 uzdcinzz 11055 sumdc2 11056 |
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