| Mathbox for Jim Kingdon |
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| Description: Equinumerosity of (𝒫 1o ↑𝑚 𝐴) and the set of subsets of 𝐴. (Contributed by Jim Kingdon, 10-Jan-2026.) |
| Ref | Expression |
|---|---|
| pw1mapen | ⊢ (𝐴 ∈ 𝑉 → (𝒫 1o ↑𝑚 𝐴) ≈ 𝒫 𝐴) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | fnmap 6923 | . . 3 ⊢ ↑𝑚 Fn (V × V) | |
| 2 | 1oex 6689 | . . . 4 ⊢ 1o ∈ V | |
| 3 | 2 | pwex 4318 | . . 3 ⊢ 𝒫 1o ∈ V |
| 4 | elex 2833 | . . 3 ⊢ (𝐴 ∈ 𝑉 → 𝐴 ∈ V) | |
| 5 | fnovex 6112 | . . 3 ⊢ (( ↑𝑚 Fn (V × V) ∧ 𝒫 1o ∈ V ∧ 𝐴 ∈ V) → (𝒫 1o ↑𝑚 𝐴) ∈ V) | |
| 6 | 1, 3, 4, 5 | mp3an12i 1382 | . 2 ⊢ (𝐴 ∈ 𝑉 → (𝒫 1o ↑𝑚 𝐴) ∈ V) |
| 7 | eqid 2238 | . . 3 ⊢ (𝑠 ∈ (𝒫 1o ↑𝑚 𝐴) ↦ {𝑧 ∈ 𝐴 ∣ (𝑠‘𝑧) = 1o}) = (𝑠 ∈ (𝒫 1o ↑𝑚 𝐴) ↦ {𝑧 ∈ 𝐴 ∣ (𝑠‘𝑧) = 1o}) | |
| 8 | 7 | pw1map 17008 | . 2 ⊢ (𝐴 ∈ 𝑉 → (𝑠 ∈ (𝒫 1o ↑𝑚 𝐴) ↦ {𝑧 ∈ 𝐴 ∣ (𝑠‘𝑧) = 1o}):(𝒫 1o ↑𝑚 𝐴)–1-1-onto→𝒫 𝐴) |
| 9 | f1oeng 7037 | . 2 ⊢ (((𝒫 1o ↑𝑚 𝐴) ∈ V ∧ (𝑠 ∈ (𝒫 1o ↑𝑚 𝐴) ↦ {𝑧 ∈ 𝐴 ∣ (𝑠‘𝑧) = 1o}):(𝒫 1o ↑𝑚 𝐴)–1-1-onto→𝒫 𝐴) → (𝒫 1o ↑𝑚 𝐴) ≈ 𝒫 𝐴) | |
| 10 | 6, 8, 9 | syl2anc 415 | 1 ⊢ (𝐴 ∈ 𝑉 → (𝒫 1o ↑𝑚 𝐴) ≈ 𝒫 𝐴) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 = wceq 1402 ∈ wcel 2209 {crab 2532 Vcvv 2821 𝒫 cpw 3688 class class class wbr 4128 ↦ cmpt 4190 × cxp 4770 Fn wfn 5370 –1-1-onto→wf1o 5374 ‘cfv 5375 (class class class)co 6079 1oc1o 6674 ↑𝑚 cmap 6916 ≈ cen 7014 |
| 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 623 ax-in2 624 ax-io 721 ax-5 1500 ax-7 1501 ax-gen 1502 ax-ie1 1546 ax-ie2 1547 ax-8 1557 ax-10 1558 ax-11 1559 ax-i12 1560 ax-bndl 1562 ax-4 1563 ax-17 1579 ax-i9 1583 ax-ial 1587 ax-i5r 1588 ax-13 2211 ax-14 2212 ax-ext 2220 ax-coll 4244 ax-sep 4247 ax-nul 4257 ax-pow 4309 ax-pr 4344 ax-un 4576 ax-setind 4682 |
| This theorem depends on definitions: df-bi 117 df-3an 1011 df-tru 1405 df-fal 1408 df-nf 1514 df-sb 1816 df-eu 2089 df-mo 2090 df-clab 2225 df-cleq 2231 df-clel 2234 df-nfc 2381 df-ne 2421 df-ral 2533 df-rex 2534 df-reu 2535 df-rab 2537 df-v 2823 df-sbc 3052 df-csb 3148 df-dif 3222 df-un 3224 df-in 3226 df-ss 3233 df-nul 3521 df-if 3639 df-pw 3690 df-sn 3714 df-pr 3715 df-op 3717 df-uni 3934 df-iun 4012 df-br 4129 df-opab 4191 df-mpt 4192 df-tr 4228 df-id 4436 df-iord 4509 df-on 4511 df-suc 4514 df-xp 4778 df-rel 4779 df-cnv 4780 df-co 4781 df-dm 4782 df-rn 4783 df-res 4784 df-ima 4785 df-iota 5335 df-fun 5377 df-fn 5378 df-f 5379 df-f1 5380 df-fo 5381 df-f1o 5382 df-fv 5383 df-ov 6082 df-oprab 6083 df-mpo 6084 df-1st 6368 df-2nd 6369 df-1o 6681 df-map 6918 df-en 7017 |
| This theorem is referenced by: (None) |
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