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Related theorems GIF version |
| Description: Equality theorem for a binary relation. |
| Ref | Expression |
|---|---|
| breq2 | ⊢ (A = B → (CRA ↔ CRB)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | opeq2 2479 | . . 3 ⊢ (A = B → 〈C, A〉 = 〈C, B〉) | |
| 2 | 1 | eleq1d 1532 | . 2 ⊢ (A = B → (〈C, A〉 ∈ R ↔ 〈C, B〉 ∈ R)) |
| 3 | df-br 2610 | . 2 ⊢ (CRA ↔ 〈C, A〉 ∈ R) | |
| 4 | df-br 2610 | . 2 ⊢ (CRB ↔ 〈C, B〉 ∈ R) | |
| 5 | 2, 3, 4 | 3bitr4g 553 | 1 ⊢ (A = B → (CRA ↔ CRB)) |