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| Mirrors > Home > MPE Home > Th. List > Mathboxes > bj-rcleqf | Structured version Visualization version GIF version | ||
| Description: Relative version of cleqf 2952. (Contributed by BJ, 27-Dec-2023.) |
| Ref | Expression |
|---|---|
| bj-rcleqf.a | ⊢ Ⅎ𝑥𝐴 |
| bj-rcleqf.b | ⊢ Ⅎ𝑥𝐵 |
| bj-rcleqf.v | ⊢ Ⅎ𝑥𝑉 |
| Ref | Expression |
|---|---|
| bj-rcleqf | ⊢ ((𝑉 ∩ 𝐴) = (𝑉 ∩ 𝐵) ↔ ∀𝑥 ∈ 𝑉 (𝑥 ∈ 𝐴 ↔ 𝑥 ∈ 𝐵)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | elin 3918 | . . . . 5 ⊢ (𝑥 ∈ (𝑉 ∩ 𝐴) ↔ (𝑥 ∈ 𝑉 ∧ 𝑥 ∈ 𝐴)) | |
| 2 | elin 3918 | . . . . 5 ⊢ (𝑥 ∈ (𝑉 ∩ 𝐵) ↔ (𝑥 ∈ 𝑉 ∧ 𝑥 ∈ 𝐵)) | |
| 3 | 1, 2 | bibi12i 342 | . . . 4 ⊢ ((𝑥 ∈ (𝑉 ∩ 𝐴) ↔ 𝑥 ∈ (𝑉 ∩ 𝐵)) ↔ ((𝑥 ∈ 𝑉 ∧ 𝑥 ∈ 𝐴) ↔ (𝑥 ∈ 𝑉 ∧ 𝑥 ∈ 𝐵))) |
| 4 | pm5.32 584 | . . . 4 ⊢ ((𝑥 ∈ 𝑉 → (𝑥 ∈ 𝐴 ↔ 𝑥 ∈ 𝐵)) ↔ ((𝑥 ∈ 𝑉 ∧ 𝑥 ∈ 𝐴) ↔ (𝑥 ∈ 𝑉 ∧ 𝑥 ∈ 𝐵))) | |
| 5 | 3, 4 | bitr4i 281 | . . 3 ⊢ ((𝑥 ∈ (𝑉 ∩ 𝐴) ↔ 𝑥 ∈ (𝑉 ∩ 𝐵)) ↔ (𝑥 ∈ 𝑉 → (𝑥 ∈ 𝐴 ↔ 𝑥 ∈ 𝐵))) |
| 6 | 5 | albii 1852 | . 2 ⊢ (∀𝑥(𝑥 ∈ (𝑉 ∩ 𝐴) ↔ 𝑥 ∈ (𝑉 ∩ 𝐵)) ↔ ∀𝑥(𝑥 ∈ 𝑉 → (𝑥 ∈ 𝐴 ↔ 𝑥 ∈ 𝐵))) |
| 7 | bj-rcleqf.v | . . . 4 ⊢ Ⅎ𝑥𝑉 | |
| 8 | bj-rcleqf.a | . . . 4 ⊢ Ⅎ𝑥𝐴 | |
| 9 | 7, 8 | nfin 4173 | . . 3 ⊢ Ⅎ𝑥(𝑉 ∩ 𝐴) |
| 10 | bj-rcleqf.b | . . . 4 ⊢ Ⅎ𝑥𝐵 | |
| 11 | 7, 10 | nfin 4173 | . . 3 ⊢ Ⅎ𝑥(𝑉 ∩ 𝐵) |
| 12 | 9, 11 | cleqf 2952 | . 2 ⊢ ((𝑉 ∩ 𝐴) = (𝑉 ∩ 𝐵) ↔ ∀𝑥(𝑥 ∈ (𝑉 ∩ 𝐴) ↔ 𝑥 ∈ (𝑉 ∩ 𝐵))) |
| 13 | df-ral 3079 | . 2 ⊢ (∀𝑥 ∈ 𝑉 (𝑥 ∈ 𝐴 ↔ 𝑥 ∈ 𝐵) ↔ ∀𝑥(𝑥 ∈ 𝑉 → (𝑥 ∈ 𝐴 ↔ 𝑥 ∈ 𝐵))) | |
| 14 | 6, 12, 13 | 3bitr4i 306 | 1 ⊢ ((𝑉 ∩ 𝐴) = (𝑉 ∩ 𝐵) ↔ ∀𝑥 ∈ 𝑉 (𝑥 ∈ 𝐴 ↔ 𝑥 ∈ 𝐵)) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ↔ wb 209 ∧ wa 401 ∀wal 1568 = wceq 1570 ∈ wcel 2145 Ⅎwnfc 2909 ∀wral 3078 ∩ cin 3901 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-8 2147 ax-9 2155 ax-11 2194 ax-12 2215 ax-ext 2734 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-tru 1573 df-ex 1813 df-nf 1817 df-sb 2100 df-clab 2741 df-cleq 2754 df-clel 2837 df-nfc 2911 df-ral 3079 df-v 3455 df-in 3909 |
| This theorem is used by: bj-rcleq 37778 bj-reabeq 37779 |
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