| 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 6823 | . . 3 ⊢ ↑𝑚 Fn (V × V) | |
| 2 | 1oex 6589 | . . . 4 ⊢ 1o ∈ V | |
| 3 | 2 | pwex 4273 | . . 3 ⊢ 𝒫 1o ∈ V |
| 4 | elex 2814 | . . 3 ⊢ (𝐴 ∈ 𝑉 → 𝐴 ∈ V) | |
| 5 | fnovex 6050 | . . 3 ⊢ (( ↑𝑚 Fn (V × V) ∧ 𝒫 1o ∈ V ∧ 𝐴 ∈ V) → (𝒫 1o ↑𝑚 𝐴) ∈ V) | |
| 6 | 1, 3, 4, 5 | mp3an12i 1377 | . 2 ⊢ (𝐴 ∈ 𝑉 → (𝒫 1o ↑𝑚 𝐴) ∈ V) |
| 7 | eqid 2231 | . . 3 ⊢ (𝑠 ∈ (𝒫 1o ↑𝑚 𝐴) ↦ {𝑧 ∈ 𝐴 ∣ (𝑠‘𝑧) = 1o}) = (𝑠 ∈ (𝒫 1o ↑𝑚 𝐴) ↦ {𝑧 ∈ 𝐴 ∣ (𝑠‘𝑧) = 1o}) | |
| 8 | 7 | pw1map 16596 | . 2 ⊢ (𝐴 ∈ 𝑉 → (𝑠 ∈ (𝒫 1o ↑𝑚 𝐴) ↦ {𝑧 ∈ 𝐴 ∣ (𝑠‘𝑧) = 1o}):(𝒫 1o ↑𝑚 𝐴)–1-1-onto→𝒫 𝐴) |
| 9 | f1oeng 6929 | . 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 1397 ∈ wcel 2202 {crab 2514 Vcvv 2802 𝒫 cpw 3652 class class class wbr 4088 ↦ cmpt 4150 × cxp 4723 Fn wfn 5321 –1-1-onto→wf1o 5325 ‘cfv 5326 (class class class)co 6017 1oc1o 6574 ↑𝑚 cmap 6816 ≈ cen 6906 |
| 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 2204 ax-14 2205 ax-ext 2213 ax-coll 4204 ax-sep 4207 ax-nul 4215 ax-pow 4264 ax-pr 4299 ax-un 4530 ax-setind 4635 |
| This theorem depends on definitions: df-bi 117 df-3an 1006 df-tru 1400 df-fal 1403 df-nf 1509 df-sb 1811 df-eu 2082 df-mo 2083 df-clab 2218 df-cleq 2224 df-clel 2227 df-nfc 2363 df-ne 2403 df-ral 2515 df-rex 2516 df-reu 2517 df-rab 2519 df-v 2804 df-sbc 3032 df-csb 3128 df-dif 3202 df-un 3204 df-in 3206 df-ss 3213 df-nul 3495 df-if 3606 df-pw 3654 df-sn 3675 df-pr 3676 df-op 3678 df-uni 3894 df-iun 3972 df-br 4089 df-opab 4151 df-mpt 4152 df-tr 4188 df-id 4390 df-iord 4463 df-on 4465 df-suc 4468 df-xp 4731 df-rel 4732 df-cnv 4733 df-co 4734 df-dm 4735 df-rn 4736 df-res 4737 df-ima 4738 df-iota 5286 df-fun 5328 df-fn 5329 df-f 5330 df-f1 5331 df-fo 5332 df-f1o 5333 df-fv 5334 df-ov 6020 df-oprab 6021 df-mpo 6022 df-1st 6302 df-2nd 6303 df-1o 6581 df-map 6818 df-en 6909 |
| This theorem is referenced by: (None) |
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