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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 | pm5.5 364 | . . . . . 6 ⊢ (∃𝑥𝜓 → ((∃𝑥𝜓 → 𝑦 ∈ (V × V)) ↔ 𝑦 ∈ (V × V))) | |
| 3 | 1, 2 | syl 18 | . . . . 5 ⊢ (𝜑 → ((∃𝑥𝜓 → 𝑦 ∈ (V × V)) ↔ 𝑦 ∈ (V × V))) |
| 4 | 3 | bicomd 226 | . . . 4 ⊢ (𝜑 → (𝑦 ∈ (V × V) ↔ (∃𝑥𝜓 → 𝑦 ∈ (V × V)))) |
| 5 | 4 | anbi1d 643 | . . 3 ⊢ (𝜑 → ((𝑦 ∈ (V × V) ∧ ∀𝑥(𝜓 → 𝑦 ∈ ◡𝑥)) ↔ ((∃𝑥𝜓 → 𝑦 ∈ (V × V)) ∧ ∀𝑥(𝜓 → 𝑦 ∈ ◡𝑥)))) |
| 6 | elcnvintab 44546 | . . 3 ⊢ (𝑦 ∈ ◡∩ {𝑥 ∣ 𝜓} ↔ (𝑦 ∈ (V × V) ∧ ∀𝑥(𝜓 → 𝑦 ∈ ◡𝑥))) | |
| 7 | vex 3454 | . . . . . 6 ⊢ 𝑥 ∈ V | |
| 8 | 7 | cnvex 7920 | . . . . 5 ⊢ ◡𝑥 ∈ V |
| 9 | relcnv 6094 | . . . . . 6 ⊢ Rel ◡𝑥 | |
| 10 | df-rel 5654 | . . . . . 6 ⊢ (Rel ◡𝑥 ↔ ◡𝑥 ⊆ (V × V)) | |
| 11 | 9, 10 | mpbi 233 | . . . . 5 ⊢ ◡𝑥 ⊆ (V × V) |
| 12 | 8, 11 | elmapintrab 44520 | . . . 4 ⊢ (𝑦 ∈ V → (𝑦 ∈ ∩ {𝑤 ∈ 𝒫 (V × V) ∣ ∃𝑥(𝑤 = ◡𝑥 ∧ 𝜓)} ↔ ((∃𝑥𝜓 → 𝑦 ∈ (V × V)) ∧ ∀𝑥(𝜓 → 𝑦 ∈ ◡𝑥)))) |
| 13 | 12 | elv 3455 | . . 3 ⊢ (𝑦 ∈ ∩ {𝑤 ∈ 𝒫 (V × V) ∣ ∃𝑥(𝑤 = ◡𝑥 ∧ 𝜓)} ↔ ((∃𝑥𝜓 → 𝑦 ∈ (V × V)) ∧ ∀𝑥(𝜓 → 𝑦 ∈ ◡𝑥))) |
| 14 | 5, 6, 13 | 3bitr4g 317 | . 2 ⊢ (𝜑 → (𝑦 ∈ ◡∩ {𝑥 ∣ 𝜓} ↔ 𝑦 ∈ ∩ {𝑤 ∈ 𝒫 (V × V) ∣ ∃𝑥(𝑤 = ◡𝑥 ∧ 𝜓)})) |
| 15 | 14 | eqrdv 2758 | 1 ⊢ (𝜑 → ◡∩ {𝑥 ∣ 𝜓} = ∩ {𝑤 ∈ 𝒫 (V × V) ∣ ∃𝑥(𝑤 = ◡𝑥 ∧ 𝜓)}) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ↔ wb 209 ∧ wa 401 ∀wal 1568 = wceq 1570 ∃wex 1812 ∈ wcel 2145 {cab 2738 {crab 3412 Vcvv 3450 ⊆ wss 3898 𝒫 cpw 4556 ∩ cint 4906 × cxp 5645 ◡ccnv 5646 Rel wrel 5652 |
| 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-10 2178 ax-11 2194 ax-12 2213 ax-ext 2732 ax-sep 5248 ax-nul 5259 ax-pow 5326 ax-pr 5390 ax-un 7734 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2100 df-mo 2564 df-eu 2594 df-clab 2739 df-cleq 2752 df-clel 2835 df-nfc 2909 df-ne 2956 df-ral 3077 df-rex 3087 df-rab 3413 df-v 3452 df-dif 3901 df-un 3903 df-in 3905 df-ss 3915 df-nul 4279 df-if 4482 df-pw 4558 df-sn 4584 df-pr 4586 df-op 4590 df-uni 4867 df-int 4907 df-br 5103 df-opab 5167 df-mpt 5186 df-id 5542 df-xp 5653 df-rel 5654 df-cnv 5655 df-co 5656 df-dm 5657 df-rn 5658 df-iota 6483 df-fun 6529 df-fv 6535 df-1st 7984 df-2nd 7985 |
| This theorem is used by: clcnvlem 44567 |
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