Mathbox for Stefan O'Rear |
< Previous
Next >
Nearby theorems |
||
Mirrors > Home > MPE Home > Th. List > Mathboxes > pwfi2en | Structured version Visualization version GIF version |
Description: Finitely supported indicator functions are equinumerous to finite subsets. MOVABLE (Contributed by Stefan O'Rear, 10-Jul-2015.) (Revised by AV, 14-Jun-2020.) |
Ref | Expression |
---|---|
pwfi2en.s | ⊢ 𝑆 = {𝑦 ∈ (2o ↑m 𝐴) ∣ 𝑦 finSupp ∅} |
Ref | Expression |
---|---|
pwfi2en | ⊢ (𝐴 ∈ 𝑉 → 𝑆 ≈ (𝒫 𝐴 ∩ Fin)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | pwfi2en.s | . . 3 ⊢ 𝑆 = {𝑦 ∈ (2o ↑m 𝐴) ∣ 𝑦 finSupp ∅} | |
2 | eqid 2738 | . . 3 ⊢ (𝑥 ∈ 𝑆 ↦ (◡𝑥 “ {1o})) = (𝑥 ∈ 𝑆 ↦ (◡𝑥 “ {1o})) | |
3 | 1, 2 | pwfi2f1o 40837 | . 2 ⊢ (𝐴 ∈ 𝑉 → (𝑥 ∈ 𝑆 ↦ (◡𝑥 “ {1o})):𝑆–1-1-onto→(𝒫 𝐴 ∩ Fin)) |
4 | ovex 7288 | . . . 4 ⊢ (2o ↑m 𝐴) ∈ V | |
5 | 1, 4 | rabex2 5253 | . . 3 ⊢ 𝑆 ∈ V |
6 | 5 | f1oen 8716 | . 2 ⊢ ((𝑥 ∈ 𝑆 ↦ (◡𝑥 “ {1o})):𝑆–1-1-onto→(𝒫 𝐴 ∩ Fin) → 𝑆 ≈ (𝒫 𝐴 ∩ Fin)) |
7 | 3, 6 | syl 17 | 1 ⊢ (𝐴 ∈ 𝑉 → 𝑆 ≈ (𝒫 𝐴 ∩ Fin)) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 = wceq 1539 ∈ wcel 2108 {crab 3067 ∩ cin 3882 ∅c0 4253 𝒫 cpw 4530 {csn 4558 class class class wbr 5070 ↦ cmpt 5153 ◡ccnv 5579 “ cima 5583 –1-1-onto→wf1o 6417 (class class class)co 7255 1oc1o 8260 2oc2o 8261 ↑m cmap 8573 ≈ cen 8688 Fincfn 8691 finSupp cfsupp 9058 |
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 |
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-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-iun 4923 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-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-ord 6254 df-on 6255 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-ov 7258 df-oprab 7259 df-mpo 7260 df-1st 7804 df-2nd 7805 df-supp 7949 df-1o 8267 df-2o 8268 df-map 8575 df-en 8692 df-fsupp 9059 |
This theorem is referenced by: frlmpwfi 40839 |
Copyright terms: Public domain | W3C validator |