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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 | pm5.5 361 | . . . . . 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 223 | . . . 4 ⊢ (𝜑 → (𝑦 ∈ (V × V) ↔ (∃𝑥𝜓 → 𝑦 ∈ (V × V)))) |
| 5 | 4 | anbi1d 631 | . . 3 ⊢ (𝜑 → ((𝑦 ∈ (V × V) ∧ ∀𝑥(𝜓 → 𝑦 ∈ ◡𝑥)) ↔ ((∃𝑥𝜓 → 𝑦 ∈ (V × V)) ∧ ∀𝑥(𝜓 → 𝑦 ∈ ◡𝑥)))) |
| 6 | elcnvintab 43626 | . . 3 ⊢ (𝑦 ∈ ◡∩ {𝑥 ∣ 𝜓} ↔ (𝑦 ∈ (V × V) ∧ ∀𝑥(𝜓 → 𝑦 ∈ ◡𝑥))) | |
| 7 | vex 3463 | . . . . . 6 ⊢ 𝑥 ∈ V | |
| 8 | 7 | cnvex 7921 | . . . . 5 ⊢ ◡𝑥 ∈ V |
| 9 | relcnv 6091 | . . . . . 6 ⊢ Rel ◡𝑥 | |
| 10 | df-rel 5661 | . . . . . 6 ⊢ (Rel ◡𝑥 ↔ ◡𝑥 ⊆ (V × V)) | |
| 11 | 9, 10 | mpbi 230 | . . . . 5 ⊢ ◡𝑥 ⊆ (V × V) |
| 12 | 8, 11 | elmapintrab 43600 | . . . 4 ⊢ (𝑦 ∈ V → (𝑦 ∈ ∩ {𝑤 ∈ 𝒫 (V × V) ∣ ∃𝑥(𝑤 = ◡𝑥 ∧ 𝜓)} ↔ ((∃𝑥𝜓 → 𝑦 ∈ (V × V)) ∧ ∀𝑥(𝜓 → 𝑦 ∈ ◡𝑥)))) |
| 13 | 12 | elv 3464 | . . 3 ⊢ (𝑦 ∈ ∩ {𝑤 ∈ 𝒫 (V × V) ∣ ∃𝑥(𝑤 = ◡𝑥 ∧ 𝜓)} ↔ ((∃𝑥𝜓 → 𝑦 ∈ (V × V)) ∧ ∀𝑥(𝜓 → 𝑦 ∈ ◡𝑥))) |
| 14 | 5, 6, 13 | 3bitr4g 314 | . 2 ⊢ (𝜑 → (𝑦 ∈ ◡∩ {𝑥 ∣ 𝜓} ↔ 𝑦 ∈ ∩ {𝑤 ∈ 𝒫 (V × V) ∣ ∃𝑥(𝑤 = ◡𝑥 ∧ 𝜓)})) |
| 15 | 14 | eqrdv 2733 | 1 ⊢ (𝜑 → ◡∩ {𝑥 ∣ 𝜓} = ∩ {𝑤 ∈ 𝒫 (V × V) ∣ ∃𝑥(𝑤 = ◡𝑥 ∧ 𝜓)}) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ↔ wb 206 ∧ wa 395 ∀wal 1538 = wceq 1540 ∃wex 1779 ∈ wcel 2108 {cab 2713 {crab 3415 Vcvv 3459 ⊆ wss 3926 𝒫 cpw 4575 ∩ cint 4922 × cxp 5652 ◡ccnv 5653 Rel wrel 5659 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1795 ax-4 1809 ax-5 1910 ax-6 1967 ax-7 2007 ax-8 2110 ax-9 2118 ax-10 2141 ax-11 2157 ax-12 2177 ax-ext 2707 ax-sep 5266 ax-nul 5276 ax-pow 5335 ax-pr 5402 ax-un 7729 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3an 1088 df-tru 1543 df-fal 1553 df-ex 1780 df-nf 1784 df-sb 2065 df-mo 2539 df-eu 2568 df-clab 2714 df-cleq 2727 df-clel 2809 df-nfc 2885 df-ne 2933 df-ral 3052 df-rex 3061 df-rab 3416 df-v 3461 df-dif 3929 df-un 3931 df-in 3933 df-ss 3943 df-nul 4309 df-if 4501 df-pw 4577 df-sn 4602 df-pr 4604 df-op 4608 df-uni 4884 df-int 4923 df-br 5120 df-opab 5182 df-mpt 5202 df-id 5548 df-xp 5660 df-rel 5661 df-cnv 5662 df-co 5663 df-dm 5664 df-rn 5665 df-iota 6484 df-fun 6533 df-fv 6539 df-1st 7988 df-2nd 7989 |
| This theorem is referenced by: clcnvlem 43647 |
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