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Mirrors > Home > ILE Home > Th. List > Mathboxes > bdeq | GIF version |
Description: Equality property for the predicate BOUNDED. (Contributed by BJ, 3-Oct-2019.) |
Ref | Expression |
---|---|
bdeq.1 | ⊢ (𝜑 ↔ 𝜓) |
Ref | Expression |
---|---|
bdeq | ⊢ (BOUNDED 𝜑 ↔ BOUNDED 𝜓) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | bdeq.1 | . . 3 ⊢ (𝜑 ↔ 𝜓) | |
2 | 1 | ax-bd0 9933 | . 2 ⊢ (BOUNDED 𝜑 → BOUNDED 𝜓) |
3 | 1 | bicomi 123 | . . 3 ⊢ (𝜓 ↔ 𝜑) |
4 | 3 | ax-bd0 9933 | . 2 ⊢ (BOUNDED 𝜓 → BOUNDED 𝜑) |
5 | 2, 4 | impbii 117 | 1 ⊢ (BOUNDED 𝜑 ↔ BOUNDED 𝜓) |
Colors of variables: wff set class |
Syntax hints: ↔ wb 98 BOUNDED wbd 9932 |
This theorem was proved from axioms: ax-1 5 ax-2 6 ax-mp 7 ax-ia1 99 ax-ia2 100 ax-ia3 101 ax-bd0 9933 |
This theorem depends on definitions: df-bi 110 |
This theorem is referenced by: bdceq 9962 |
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