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Mirrors > Home > MPE Home > Th. List > Mathboxes > pwinfi3 | Structured version Visualization version GIF version |
Description: The powerclass of an infinite set is an infinite set, and vice-versa. Here 𝑇 is a transitive Tarski universe. (Contributed by RP, 21-Mar-2020.) |
Ref | Expression |
---|---|
pwinfi3 | ⊢ ((𝑇 ∈ Tarski ∧ Tr 𝑇) → (𝐴 ∈ (𝑇 ∖ Fin) ↔ 𝒫 𝐴 ∈ (𝑇 ∖ Fin))) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | tskuni 10470 | . . . . 5 ⊢ ((𝑇 ∈ Tarski ∧ Tr 𝑇 ∧ 𝑥 ∈ 𝑇) → ∪ 𝑥 ∈ 𝑇) | |
2 | 1 | 3expia 1119 | . . . 4 ⊢ ((𝑇 ∈ Tarski ∧ Tr 𝑇) → (𝑥 ∈ 𝑇 → ∪ 𝑥 ∈ 𝑇)) |
3 | tskpw 10440 | . . . . . 6 ⊢ ((𝑇 ∈ Tarski ∧ 𝑥 ∈ 𝑇) → 𝒫 𝑥 ∈ 𝑇) | |
4 | 3 | ex 412 | . . . . 5 ⊢ (𝑇 ∈ Tarski → (𝑥 ∈ 𝑇 → 𝒫 𝑥 ∈ 𝑇)) |
5 | 4 | adantr 480 | . . . 4 ⊢ ((𝑇 ∈ Tarski ∧ Tr 𝑇) → (𝑥 ∈ 𝑇 → 𝒫 𝑥 ∈ 𝑇)) |
6 | 2, 5 | jcad 512 | . . 3 ⊢ ((𝑇 ∈ Tarski ∧ Tr 𝑇) → (𝑥 ∈ 𝑇 → (∪ 𝑥 ∈ 𝑇 ∧ 𝒫 𝑥 ∈ 𝑇))) |
7 | 6 | ralrimiv 3106 | . 2 ⊢ ((𝑇 ∈ Tarski ∧ Tr 𝑇) → ∀𝑥 ∈ 𝑇 (∪ 𝑥 ∈ 𝑇 ∧ 𝒫 𝑥 ∈ 𝑇)) |
8 | pwinfig 41057 | . 2 ⊢ (∀𝑥 ∈ 𝑇 (∪ 𝑥 ∈ 𝑇 ∧ 𝒫 𝑥 ∈ 𝑇) → (𝐴 ∈ (𝑇 ∖ Fin) ↔ 𝒫 𝐴 ∈ (𝑇 ∖ Fin))) | |
9 | 7, 8 | syl 17 | 1 ⊢ ((𝑇 ∈ Tarski ∧ Tr 𝑇) → (𝐴 ∈ (𝑇 ∖ Fin) ↔ 𝒫 𝐴 ∈ (𝑇 ∖ Fin))) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ↔ wb 205 ∧ wa 395 ∈ wcel 2108 ∀wral 3063 ∖ cdif 3880 𝒫 cpw 4530 ∪ cuni 4836 Tr wtr 5187 Fincfn 8691 Tarskictsk 10435 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1799 ax-4 1813 ax-5 1914 ax-6 1972 ax-7 2012 ax-8 2110 ax-9 2118 ax-10 2139 ax-11 2156 ax-12 2173 ax-ext 2709 ax-rep 5205 ax-sep 5218 ax-nul 5225 ax-pow 5283 ax-pr 5347 ax-un 7566 ax-inf2 9329 ax-ac2 10150 |
This theorem depends on definitions: df-bi 206 df-an 396 df-or 844 df-3or 1086 df-3an 1087 df-tru 1542 df-fal 1552 df-ex 1784 df-nf 1788 df-sb 2069 df-mo 2540 df-eu 2569 df-clab 2716 df-cleq 2730 df-clel 2817 df-nfc 2888 df-ne 2943 df-ral 3068 df-rex 3069 df-reu 3070 df-rmo 3071 df-rab 3072 df-v 3424 df-sbc 3712 df-csb 3829 df-dif 3886 df-un 3888 df-in 3890 df-ss 3900 df-pss 3902 df-nul 4254 df-if 4457 df-pw 4532 df-sn 4559 df-pr 4561 df-tp 4563 df-op 4565 df-uni 4837 df-int 4877 df-iun 4923 df-iin 4924 df-br 5071 df-opab 5133 df-mpt 5154 df-tr 5188 df-id 5480 df-eprel 5486 df-po 5494 df-so 5495 df-fr 5535 df-se 5536 df-we 5537 df-xp 5586 df-rel 5587 df-cnv 5588 df-co 5589 df-dm 5590 df-rn 5591 df-res 5592 df-ima 5593 df-pred 6191 df-ord 6254 df-on 6255 df-lim 6256 df-suc 6257 df-iota 6376 df-fun 6420 df-fn 6421 df-f 6422 df-f1 6423 df-fo 6424 df-f1o 6425 df-fv 6426 df-isom 6427 df-riota 7212 df-ov 7258 df-oprab 7259 df-mpo 7260 df-om 7688 df-1st 7804 df-2nd 7805 df-frecs 8068 df-wrecs 8099 df-smo 8148 df-recs 8173 df-rdg 8212 df-1o 8267 df-2o 8268 df-er 8456 df-map 8575 df-ixp 8644 df-en 8692 df-dom 8693 df-sdom 8694 df-fin 8695 df-oi 9199 df-har 9246 df-r1 9453 df-card 9628 df-aleph 9629 df-cf 9630 df-acn 9631 df-ac 9803 df-wina 10371 df-ina 10372 df-tsk 10436 |
This theorem is referenced by: (None) |
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