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| Mirrors > Home > MPE Home > Th. List > Mathboxes > cnvintabd | Structured version Visualization version GIF version | ||
| Description: Value of the converse of the intersection of a nonempty class. (Contributed by RP, 20-Aug-2020.) |
| Ref | Expression |
|---|---|
| cnvintabd.x | ⊢ (𝜑 → ∃𝑥𝜓) |
| Ref | Expression |
|---|---|
| cnvintabd | ⊢ (𝜑 → ◡∩ {𝑥 ∣ 𝜓} = ∩ {𝑤 ∈ 𝒫 (V × V) ∣ ∃𝑥(𝑤 = ◡𝑥 ∧ 𝜓)}) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | cnvintabd.x | . . . . . 6 ⊢ (𝜑 → ∃𝑥𝜓) | |
| 2 | pm5.5 363 | . . . . . 6 ⊢ (∃𝑥𝜓 → ((∃𝑥𝜓 → 𝑦 ∈ (V × V)) ↔ 𝑦 ∈ (V × V))) | |
| 3 | 1, 2 | syl 17 | . . . . 5 ⊢ (𝜑 → ((∃𝑥𝜓 → 𝑦 ∈ (V × V)) ↔ 𝑦 ∈ (V × V))) |
| 4 | 3 | bicomd 225 | . . . 4 ⊢ (𝜑 → (𝑦 ∈ (V × V) ↔ (∃𝑥𝜓 → 𝑦 ∈ (V × V)))) |
| 5 | 4 | anbi1d 640 | . . 3 ⊢ (𝜑 → ((𝑦 ∈ (V × V) ∧ ∀𝑥(𝜓 → 𝑦 ∈ ◡𝑥)) ↔ ((∃𝑥𝜓 → 𝑦 ∈ (V × V)) ∧ ∀𝑥(𝜓 → 𝑦 ∈ ◡𝑥)))) |
| 6 | elcnvintab 44183 | . . 3 ⊢ (𝑦 ∈ ◡∩ {𝑥 ∣ 𝜓} ↔ (𝑦 ∈ (V × V) ∧ ∀𝑥(𝜓 → 𝑦 ∈ ◡𝑥))) | |
| 7 | vex 3460 | . . . . . 6 ⊢ 𝑥 ∈ V | |
| 8 | 7 | cnvex 7908 | . . . . 5 ⊢ ◡𝑥 ∈ V |
| 9 | relcnv 6095 | . . . . . 6 ⊢ Rel ◡𝑥 | |
| 10 | df-rel 5656 | . . . . . 6 ⊢ (Rel ◡𝑥 ↔ ◡𝑥 ⊆ (V × V)) | |
| 11 | 9, 10 | mpbi 232 | . . . . 5 ⊢ ◡𝑥 ⊆ (V × V) |
| 12 | 8, 11 | elmapintrab 44157 | . . . 4 ⊢ (𝑦 ∈ V → (𝑦 ∈ ∩ {𝑤 ∈ 𝒫 (V × V) ∣ ∃𝑥(𝑤 = ◡𝑥 ∧ 𝜓)} ↔ ((∃𝑥𝜓 → 𝑦 ∈ (V × V)) ∧ ∀𝑥(𝜓 → 𝑦 ∈ ◡𝑥)))) |
| 13 | 12 | elv 3461 | . . 3 ⊢ (𝑦 ∈ ∩ {𝑤 ∈ 𝒫 (V × V) ∣ ∃𝑥(𝑤 = ◡𝑥 ∧ 𝜓)} ↔ ((∃𝑥𝜓 → 𝑦 ∈ (V × V)) ∧ ∀𝑥(𝜓 → 𝑦 ∈ ◡𝑥))) |
| 14 | 5, 6, 13 | 3bitr4g 316 | . 2 ⊢ (𝜑 → (𝑦 ∈ ◡∩ {𝑥 ∣ 𝜓} ↔ 𝑦 ∈ ∩ {𝑤 ∈ 𝒫 (V × V) ∣ ∃𝑥(𝑤 = ◡𝑥 ∧ 𝜓)})) |
| 15 | 14 | eqrdv 2762 | 1 ⊢ (𝜑 → ◡∩ {𝑥 ∣ 𝜓} = ∩ {𝑤 ∈ 𝒫 (V × V) ∣ ∃𝑥(𝑤 = ◡𝑥 ∧ 𝜓)}) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ↔ wb 208 ∧ wa 399 ∀wal 1560 = wceq 1562 ∃wex 1801 ∈ wcel 2144 {cab 2742 {crab 3416 Vcvv 3456 ⊆ wss 3906 𝒫 cpw 4557 ∩ cint 4907 × cxp 5647 ◡ccnv 5648 Rel wrel 5654 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1817 ax-4 1831 ax-5 1932 ax-6 1989 ax-7 2030 ax-8 2146 ax-9 2154 ax-10 2177 ax-11 2193 ax-12 2214 ax-ext 2736 ax-sep 5248 ax-nul 5258 ax-pow 5324 ax-pr 5392 ax-un 7720 |
| This theorem depends on definitions: df-bi 209 df-an 400 df-or 859 df-3an 1101 df-tru 1565 df-fal 1575 df-ex 1802 df-nf 1806 df-sb 2093 df-mo 2568 df-eu 2598 df-clab 2743 df-cleq 2756 df-clel 2839 df-nfc 2913 df-ne 2960 df-ral 3079 df-rex 3089 df-rab 3417 df-v 3458 df-dif 3909 df-un 3911 df-in 3913 df-ss 3923 df-nul 4288 df-if 4483 df-pw 4559 df-sn 4585 df-pr 4587 df-op 4591 df-uni 4868 df-int 4908 df-br 5103 df-opab 5165 df-mpt 5184 df-id 5544 df-xp 5655 df-rel 5656 df-cnv 5657 df-co 5658 df-dm 5659 df-rn 5660 df-iota 6479 df-fun 6525 df-fv 6531 df-1st 7972 df-2nd 7973 |
| This theorem is referenced by: clcnvlem 44204 |
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