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Mirrors > Home > MPE Home > Th. List > psrbagsn | Structured version Visualization version GIF version |
Description: A singleton bag is a bag. (Contributed by Stefan O'Rear, 9-Mar-2015.) |
Ref | Expression |
---|---|
psrbag0.d | ⊢ 𝐷 = {𝑓 ∈ (ℕ0 ↑m 𝐼) ∣ (◡𝑓 “ ℕ) ∈ Fin} |
Ref | Expression |
---|---|
psrbagsn | ⊢ (𝐼 ∈ 𝑉 → (𝑥 ∈ 𝐼 ↦ if(𝑥 = 𝐾, 1, 0)) ∈ 𝐷) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | 1nn0 12295 | . . . . . . 7 ⊢ 1 ∈ ℕ0 | |
2 | 0nn0 12294 | . . . . . . 7 ⊢ 0 ∈ ℕ0 | |
3 | 1, 2 | ifcli 4512 | . . . . . 6 ⊢ if(𝑥 = 𝐾, 1, 0) ∈ ℕ0 |
4 | 3 | a1i 11 | . . . . 5 ⊢ ((⊤ ∧ 𝑥 ∈ 𝐼) → if(𝑥 = 𝐾, 1, 0) ∈ ℕ0) |
5 | 4 | fmpttd 7021 | . . . 4 ⊢ (⊤ → (𝑥 ∈ 𝐼 ↦ if(𝑥 = 𝐾, 1, 0)):𝐼⟶ℕ0) |
6 | 5 | mptru 1546 | . . 3 ⊢ (𝑥 ∈ 𝐼 ↦ if(𝑥 = 𝐾, 1, 0)):𝐼⟶ℕ0 |
7 | eqid 2736 | . . . . 5 ⊢ (𝑥 ∈ 𝐼 ↦ if(𝑥 = 𝐾, 1, 0)) = (𝑥 ∈ 𝐼 ↦ if(𝑥 = 𝐾, 1, 0)) | |
8 | 7 | mptpreima 6156 | . . . 4 ⊢ (◡(𝑥 ∈ 𝐼 ↦ if(𝑥 = 𝐾, 1, 0)) “ ℕ) = {𝑥 ∈ 𝐼 ∣ if(𝑥 = 𝐾, 1, 0) ∈ ℕ} |
9 | snfi 8869 | . . . . . 6 ⊢ {𝐾} ∈ Fin | |
10 | inss1 4168 | . . . . . . 7 ⊢ ({𝑥 ∣ 𝑥 = 𝐾} ∩ 𝐼) ⊆ {𝑥 ∣ 𝑥 = 𝐾} | |
11 | dfrab2 4250 | . . . . . . 7 ⊢ {𝑥 ∈ 𝐼 ∣ 𝑥 = 𝐾} = ({𝑥 ∣ 𝑥 = 𝐾} ∩ 𝐼) | |
12 | df-sn 4566 | . . . . . . 7 ⊢ {𝐾} = {𝑥 ∣ 𝑥 = 𝐾} | |
13 | 10, 11, 12 | 3sstr4i 3969 | . . . . . 6 ⊢ {𝑥 ∈ 𝐼 ∣ 𝑥 = 𝐾} ⊆ {𝐾} |
14 | ssfi 8994 | . . . . . 6 ⊢ (({𝐾} ∈ Fin ∧ {𝑥 ∈ 𝐼 ∣ 𝑥 = 𝐾} ⊆ {𝐾}) → {𝑥 ∈ 𝐼 ∣ 𝑥 = 𝐾} ∈ Fin) | |
15 | 9, 13, 14 | mp2an 690 | . . . . 5 ⊢ {𝑥 ∈ 𝐼 ∣ 𝑥 = 𝐾} ∈ Fin |
16 | 0nnn 12055 | . . . . . . . . 9 ⊢ ¬ 0 ∈ ℕ | |
17 | iffalse 4474 | . . . . . . . . . 10 ⊢ (¬ 𝑥 = 𝐾 → if(𝑥 = 𝐾, 1, 0) = 0) | |
18 | 17 | eleq1d 2821 | . . . . . . . . 9 ⊢ (¬ 𝑥 = 𝐾 → (if(𝑥 = 𝐾, 1, 0) ∈ ℕ ↔ 0 ∈ ℕ)) |
19 | 16, 18 | mtbiri 327 | . . . . . . . 8 ⊢ (¬ 𝑥 = 𝐾 → ¬ if(𝑥 = 𝐾, 1, 0) ∈ ℕ) |
20 | 19 | con4i 114 | . . . . . . 7 ⊢ (if(𝑥 = 𝐾, 1, 0) ∈ ℕ → 𝑥 = 𝐾) |
21 | 20 | a1i 11 | . . . . . 6 ⊢ (𝑥 ∈ 𝐼 → (if(𝑥 = 𝐾, 1, 0) ∈ ℕ → 𝑥 = 𝐾)) |
22 | 21 | ss2rabi 4016 | . . . . 5 ⊢ {𝑥 ∈ 𝐼 ∣ if(𝑥 = 𝐾, 1, 0) ∈ ℕ} ⊆ {𝑥 ∈ 𝐼 ∣ 𝑥 = 𝐾} |
23 | ssfi 8994 | . . . . 5 ⊢ (({𝑥 ∈ 𝐼 ∣ 𝑥 = 𝐾} ∈ Fin ∧ {𝑥 ∈ 𝐼 ∣ if(𝑥 = 𝐾, 1, 0) ∈ ℕ} ⊆ {𝑥 ∈ 𝐼 ∣ 𝑥 = 𝐾}) → {𝑥 ∈ 𝐼 ∣ if(𝑥 = 𝐾, 1, 0) ∈ ℕ} ∈ Fin) | |
24 | 15, 22, 23 | mp2an 690 | . . . 4 ⊢ {𝑥 ∈ 𝐼 ∣ if(𝑥 = 𝐾, 1, 0) ∈ ℕ} ∈ Fin |
25 | 8, 24 | eqeltri 2833 | . . 3 ⊢ (◡(𝑥 ∈ 𝐼 ↦ if(𝑥 = 𝐾, 1, 0)) “ ℕ) ∈ Fin |
26 | 6, 25 | pm3.2i 472 | . 2 ⊢ ((𝑥 ∈ 𝐼 ↦ if(𝑥 = 𝐾, 1, 0)):𝐼⟶ℕ0 ∧ (◡(𝑥 ∈ 𝐼 ↦ if(𝑥 = 𝐾, 1, 0)) “ ℕ) ∈ Fin) |
27 | psrbag0.d | . . 3 ⊢ 𝐷 = {𝑓 ∈ (ℕ0 ↑m 𝐼) ∣ (◡𝑓 “ ℕ) ∈ Fin} | |
28 | 27 | psrbag 21165 | . 2 ⊢ (𝐼 ∈ 𝑉 → ((𝑥 ∈ 𝐼 ↦ if(𝑥 = 𝐾, 1, 0)) ∈ 𝐷 ↔ ((𝑥 ∈ 𝐼 ↦ if(𝑥 = 𝐾, 1, 0)):𝐼⟶ℕ0 ∧ (◡(𝑥 ∈ 𝐼 ↦ if(𝑥 = 𝐾, 1, 0)) “ ℕ) ∈ Fin))) |
29 | 26, 28 | mpbiri 258 | 1 ⊢ (𝐼 ∈ 𝑉 → (𝑥 ∈ 𝐼 ↦ if(𝑥 = 𝐾, 1, 0)) ∈ 𝐷) |
Colors of variables: wff setvar class |
Syntax hints: ¬ wn 3 → wi 4 ∧ wa 397 = wceq 1539 ⊤wtru 1540 ∈ wcel 2104 {cab 2713 {crab 3284 ∩ cin 3891 ⊆ wss 3892 ifcif 4465 {csn 4565 ↦ cmpt 5164 ◡ccnv 5599 “ cima 5603 ⟶wf 6454 (class class class)co 7307 ↑m cmap 8646 Fincfn 8764 0cc0 10917 1c1 10918 ℕcn 12019 ℕ0cn0 12279 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1795 ax-4 1809 ax-5 1911 ax-6 1969 ax-7 2009 ax-8 2106 ax-9 2114 ax-10 2135 ax-11 2152 ax-12 2169 ax-ext 2707 ax-sep 5232 ax-nul 5239 ax-pow 5297 ax-pr 5361 ax-un 7620 ax-cnex 10973 ax-resscn 10974 ax-1cn 10975 ax-icn 10976 ax-addcl 10977 ax-addrcl 10978 ax-mulcl 10979 ax-mulrcl 10980 ax-mulcom 10981 ax-addass 10982 ax-mulass 10983 ax-distr 10984 ax-i2m1 10985 ax-1ne0 10986 ax-1rid 10987 ax-rnegex 10988 ax-rrecex 10989 ax-cnre 10990 ax-pre-lttri 10991 ax-pre-lttrn 10992 ax-pre-ltadd 10993 |
This theorem depends on definitions: df-bi 206 df-an 398 df-or 846 df-3or 1088 df-3an 1089 df-tru 1542 df-fal 1552 df-ex 1780 df-nf 1784 df-sb 2066 df-mo 2538 df-eu 2567 df-clab 2714 df-cleq 2728 df-clel 2814 df-nfc 2887 df-ne 2942 df-nel 3048 df-ral 3063 df-rex 3072 df-reu 3286 df-rab 3287 df-v 3439 df-sbc 3722 df-csb 3838 df-dif 3895 df-un 3897 df-in 3899 df-ss 3909 df-pss 3911 df-nul 4263 df-if 4466 df-pw 4541 df-sn 4566 df-pr 4568 df-op 4572 df-uni 4845 df-iun 4933 df-br 5082 df-opab 5144 df-mpt 5165 df-tr 5199 df-id 5500 df-eprel 5506 df-po 5514 df-so 5515 df-fr 5555 df-we 5557 df-xp 5606 df-rel 5607 df-cnv 5608 df-co 5609 df-dm 5610 df-rn 5611 df-res 5612 df-ima 5613 df-pred 6217 df-ord 6284 df-on 6285 df-lim 6286 df-suc 6287 df-iota 6410 df-fun 6460 df-fn 6461 df-f 6462 df-f1 6463 df-fo 6464 df-f1o 6465 df-fv 6466 df-ov 7310 df-oprab 7311 df-mpo 7312 df-om 7745 df-2nd 7864 df-frecs 8128 df-wrecs 8159 df-recs 8233 df-rdg 8272 df-1o 8328 df-er 8529 df-map 8648 df-en 8765 df-dom 8766 df-sdom 8767 df-fin 8768 df-pnf 11057 df-mnf 11058 df-xr 11059 df-ltxr 11060 df-le 11061 df-nn 12020 df-n0 12280 |
This theorem is referenced by: evlslem1 21337 |
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