| 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 6800 | . . 3 ⊢ ↑𝑚 Fn (V × V) | |
| 2 | 1oex 6568 | . . . 4 ⊢ 1o ∈ V | |
| 3 | 2 | pwex 4266 | . . 3 ⊢ 𝒫 1o ∈ V |
| 4 | elex 2811 | . . 3 ⊢ (𝐴 ∈ 𝑉 → 𝐴 ∈ V) | |
| 5 | fnovex 6033 | . . 3 ⊢ (( ↑𝑚 Fn (V × V) ∧ 𝒫 1o ∈ V ∧ 𝐴 ∈ V) → (𝒫 1o ↑𝑚 𝐴) ∈ V) | |
| 6 | 1, 3, 4, 5 | mp3an12i 1375 | . 2 ⊢ (𝐴 ∈ 𝑉 → (𝒫 1o ↑𝑚 𝐴) ∈ V) |
| 7 | eqid 2229 | . . 3 ⊢ (𝑠 ∈ (𝒫 1o ↑𝑚 𝐴) ↦ {𝑧 ∈ 𝐴 ∣ (𝑠‘𝑧) = 1o}) = (𝑠 ∈ (𝒫 1o ↑𝑚 𝐴) ↦ {𝑧 ∈ 𝐴 ∣ (𝑠‘𝑧) = 1o}) | |
| 8 | 7 | pw1map 16320 | . 2 ⊢ (𝐴 ∈ 𝑉 → (𝑠 ∈ (𝒫 1o ↑𝑚 𝐴) ↦ {𝑧 ∈ 𝐴 ∣ (𝑠‘𝑧) = 1o}):(𝒫 1o ↑𝑚 𝐴)–1-1-onto→𝒫 𝐴) |
| 9 | f1oeng 6906 | . 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 411 | 1 ⊢ (𝐴 ∈ 𝑉 → (𝒫 1o ↑𝑚 𝐴) ≈ 𝒫 𝐴) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 = wceq 1395 ∈ wcel 2200 {crab 2512 Vcvv 2799 𝒫 cpw 3649 class class class wbr 4082 ↦ cmpt 4144 × cxp 4716 Fn wfn 5312 –1-1-onto→wf1o 5316 ‘cfv 5317 (class class class)co 6000 1oc1o 6553 ↑𝑚 cmap 6793 ≈ cen 6883 |
| 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 617 ax-in2 618 ax-io 714 ax-5 1493 ax-7 1494 ax-gen 1495 ax-ie1 1539 ax-ie2 1540 ax-8 1550 ax-10 1551 ax-11 1552 ax-i12 1553 ax-bndl 1555 ax-4 1556 ax-17 1572 ax-i9 1576 ax-ial 1580 ax-i5r 1581 ax-13 2202 ax-14 2203 ax-ext 2211 ax-coll 4198 ax-sep 4201 ax-nul 4209 ax-pow 4257 ax-pr 4292 ax-un 4523 ax-setind 4628 |
| This theorem depends on definitions: df-bi 117 df-3an 1004 df-tru 1398 df-fal 1401 df-nf 1507 df-sb 1809 df-eu 2080 df-mo 2081 df-clab 2216 df-cleq 2222 df-clel 2225 df-nfc 2361 df-ne 2401 df-ral 2513 df-rex 2514 df-reu 2515 df-rab 2517 df-v 2801 df-sbc 3029 df-csb 3125 df-dif 3199 df-un 3201 df-in 3203 df-ss 3210 df-nul 3492 df-if 3603 df-pw 3651 df-sn 3672 df-pr 3673 df-op 3675 df-uni 3888 df-iun 3966 df-br 4083 df-opab 4145 df-mpt 4146 df-tr 4182 df-id 4383 df-iord 4456 df-on 4458 df-suc 4461 df-xp 4724 df-rel 4725 df-cnv 4726 df-co 4727 df-dm 4728 df-rn 4729 df-res 4730 df-ima 4731 df-iota 5277 df-fun 5319 df-fn 5320 df-f 5321 df-f1 5322 df-fo 5323 df-f1o 5324 df-fv 5325 df-ov 6003 df-oprab 6004 df-mpo 6005 df-1st 6284 df-2nd 6285 df-1o 6560 df-map 6795 df-en 6886 |
| This theorem is referenced by: (None) |
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