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| Mirrors > Home > ILE Home > Th. List > pwnex | GIF version | ||
| Description: The class of all power sets is a proper class. See also snnex 4547. (Contributed by BJ, 2-May-2021.) |
| Ref | Expression |
|---|---|
| pwnex | ⊢ {𝑥 ∣ ∃𝑦 𝑥 = 𝒫 𝑦} ∉ V |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | abnex 4546 | . . 3 ⊢ (∀𝑦(𝒫 𝑦 ∈ V ∧ 𝑦 ∈ 𝒫 𝑦) → ¬ {𝑥 ∣ ∃𝑦 𝑥 = 𝒫 𝑦} ∈ V) | |
| 2 | df-nel 2497 | . . 3 ⊢ ({𝑥 ∣ ∃𝑦 𝑥 = 𝒫 𝑦} ∉ V ↔ ¬ {𝑥 ∣ ∃𝑦 𝑥 = 𝒫 𝑦} ∈ V) | |
| 3 | 1, 2 | sylibr 134 | . 2 ⊢ (∀𝑦(𝒫 𝑦 ∈ V ∧ 𝑦 ∈ 𝒫 𝑦) → {𝑥 ∣ ∃𝑦 𝑥 = 𝒫 𝑦} ∉ V) |
| 4 | vpwex 4271 | . . 3 ⊢ 𝒫 𝑦 ∈ V | |
| 5 | vex 2804 | . . . 4 ⊢ 𝑦 ∈ V | |
| 6 | 5 | pwid 3668 | . . 3 ⊢ 𝑦 ∈ 𝒫 𝑦 |
| 7 | 4, 6 | pm3.2i 272 | . 2 ⊢ (𝒫 𝑦 ∈ V ∧ 𝑦 ∈ 𝒫 𝑦) |
| 8 | 3, 7 | mpg 1499 | 1 ⊢ {𝑥 ∣ ∃𝑦 𝑥 = 𝒫 𝑦} ∉ V |
| Colors of variables: wff set class |
| Syntax hints: ¬ wn 3 ∧ wa 104 ∀wal 1395 = wceq 1397 ∃wex 1540 ∈ wcel 2201 {cab 2216 ∉ wnel 2496 Vcvv 2801 𝒫 cpw 3653 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-in1 619 ax-in2 620 ax-io 716 ax-5 1495 ax-7 1496 ax-gen 1497 ax-ie1 1541 ax-ie2 1542 ax-8 1552 ax-10 1553 ax-11 1554 ax-i12 1555 ax-bndl 1557 ax-4 1558 ax-17 1574 ax-i9 1578 ax-ial 1582 ax-i5r 1583 ax-13 2203 ax-14 2204 ax-ext 2212 ax-sep 4208 ax-pow 4266 ax-un 4532 |
| This theorem depends on definitions: df-bi 117 df-tru 1400 df-fal 1403 df-nf 1509 df-sb 1810 df-clab 2217 df-cleq 2223 df-clel 2226 df-nfc 2362 df-nel 2497 df-ral 2514 df-rex 2515 df-v 2803 df-in 3205 df-ss 3212 df-pw 3655 df-sn 3676 df-uni 3895 df-iun 3973 |
| This theorem is referenced by: topnex 14839 |
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