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| Mirrors > Home > MPE Home > Th. List > fczpsrbag | Structured version Visualization version GIF version | ||
| Description: The constant function equal to zero is a finite bag. (Contributed by AV, 8-Jul-2019.) |
| Ref | Expression |
|---|---|
| psrbag.d | ⊢ 𝐷 = {𝑓 ∈ (ℕ0 ↑m 𝐼) ∣ (◡𝑓 “ ℕ) ∈ Fin} |
| Ref | Expression |
|---|---|
| fczpsrbag | ⊢ (𝐼 ∈ 𝑉 → (𝑥 ∈ 𝐼 ↦ 0) ∈ 𝐷) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | ifid 4522 | . . . . 5 ⊢ if(𝑥 = 𝑛, 0, 0) = 0 | |
| 2 | 1 | eqcomi 2769 | . . . 4 ⊢ 0 = if(𝑥 = 𝑛, 0, 0) |
| 3 | 2 | a1i 11 | . . 3 ⊢ (𝐼 ∈ 𝑉 → 0 = if(𝑥 = 𝑛, 0, 0)) |
| 4 | 3 | mpteq2dv 5198 | . 2 ⊢ (𝐼 ∈ 𝑉 → (𝑥 ∈ 𝐼 ↦ 0) = (𝑥 ∈ 𝐼 ↦ if(𝑥 = 𝑛, 0, 0))) |
| 5 | 0nn0 12591 | . . 3 ⊢ 0 ∈ ℕ0 | |
| 6 | psrbag.d | . . . 4 ⊢ 𝐷 = {𝑓 ∈ (ℕ0 ↑m 𝐼) ∣ (◡𝑓 “ ℕ) ∈ Fin} | |
| 7 | 6 | snifpsrbag 22190 | . . 3 ⊢ ((𝐼 ∈ 𝑉 ∧ 0 ∈ ℕ0) → (𝑥 ∈ 𝐼 ↦ if(𝑥 = 𝑛, 0, 0)) ∈ 𝐷) |
| 8 | 5, 7 | mpan2 704 | . 2 ⊢ (𝐼 ∈ 𝑉 → (𝑥 ∈ 𝐼 ↦ if(𝑥 = 𝑛, 0, 0)) ∈ 𝐷) |
| 9 | 4, 8 | eqeltrd 2860 | 1 ⊢ (𝐼 ∈ 𝑉 → (𝑥 ∈ 𝐼 ↦ 0) ∈ 𝐷) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 = wceq 1570 ∈ wcel 2145 {crab 3412 ifcif 4481 ↦ cmpt 5185 ◡ccnv 5646 “ cima 5650 (class class class)co 7408 ↑m cmap 8825 Fincfn 8951 0cc0 11172 ℕcn 12305 ℕ0cn0 12576 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-8 2147 ax-9 2155 ax-10 2178 ax-11 2194 ax-12 2213 ax-ext 2732 ax-rep 5231 ax-sep 5248 ax-nul 5259 ax-pow 5326 ax-pr 5390 ax-un 7734 ax-cnex 11228 ax-resscn 11229 ax-1cn 11230 ax-icn 11231 ax-addcl 11232 ax-addrcl 11233 ax-mulcl 11234 ax-mulrcl 11235 ax-mulcom 11236 ax-addass 11237 ax-mulass 11238 ax-distr 11239 ax-i2m1 11240 ax-1ne0 11241 ax-1rid 11242 ax-rnegex 11243 ax-rrecex 11244 ax-cnre 11245 ax-pre-lttri 11246 ax-pre-lttrn 11247 ax-pre-ltadd 11248 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2100 df-mo 2564 df-eu 2594 df-clab 2739 df-cleq 2752 df-clel 2835 df-nfc 2909 df-ne 2956 df-nel 3062 df-ral 3077 df-rex 3087 df-reu 3366 df-rab 3413 df-v 3452 df-sbc 3739 df-csb 3847 df-dif 3901 df-un 3903 df-in 3905 df-ss 3915 df-pss 3918 df-nul 4279 df-if 4482 df-pw 4558 df-sn 4584 df-pr 4586 df-op 4590 df-uni 4867 df-iun 4952 df-br 5103 df-opab 5167 df-mpt 5186 df-tr 5212 df-id 5542 df-eprel 5547 df-po 5555 df-so 5556 df-fr 5600 df-we 5602 df-xp 5653 df-rel 5654 df-cnv 5655 df-co 5656 df-dm 5657 df-rn 5658 df-res 5659 df-ima 5660 df-pred 6293 df-ord 6354 df-on 6355 df-lim 6356 df-suc 6357 df-iota 6483 df-fun 6529 df-fn 6530 df-f 6531 df-f1 6532 df-fo 6533 df-f1o 6534 df-fv 6535 df-ov 7411 df-oprab 7412 df-mpo 7413 df-om 7861 df-2nd 7985 df-supp 8156 df-frecs 8277 df-wrecs 8308 df-recs 8357 df-rdg 8396 df-1o 8454 df-er 8695 df-map 8827 df-en 8952 df-dom 8953 df-sdom 8954 df-fin 8955 df-fsupp 9332 df-pnf 11317 df-mnf 11318 df-xr 11319 df-ltxr 11320 df-le 11321 df-nn 12306 df-n0 12577 |
| This theorem is used by: psrbas 22204 psrlidm 22231 psrridm 22232 |
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