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| Mirrors > Home > ILE Home > Th. List > fczpsrbag | 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 | 0nn0 9590 | . . . 4 ⊢ 0 ∈ ℕ0 | |
| 2 | 1 | a1i 9 | . . 3 ⊢ ((𝐼 ∈ 𝑉 ∧ 𝑥 ∈ 𝐼) → 0 ∈ ℕ0) |
| 3 | 2 | fmpttd 5866 | . 2 ⊢ (𝐼 ∈ 𝑉 → (𝑥 ∈ 𝐼 ↦ 0):𝐼⟶ℕ0) |
| 4 | eqid 2238 | . . . . . 6 ⊢ (𝑥 ∈ 𝐼 ↦ 0) = (𝑥 ∈ 𝐼 ↦ 0) | |
| 5 | 4 | mptpreima 5284 | . . . . 5 ⊢ (◡(𝑥 ∈ 𝐼 ↦ 0) “ ℕ) = {𝑥 ∈ 𝐼 ∣ 0 ∈ ℕ} |
| 6 | 0nnn 9341 | . . . . . . 7 ⊢ ¬ 0 ∈ ℕ | |
| 7 | 6 | rgenw 2605 | . . . . . 6 ⊢ ∀𝑥 ∈ 𝐼 ¬ 0 ∈ ℕ |
| 8 | rabeq0 3552 | . . . . . 6 ⊢ ({𝑥 ∈ 𝐼 ∣ 0 ∈ ℕ} = ∅ ↔ ∀𝑥 ∈ 𝐼 ¬ 0 ∈ ℕ) | |
| 9 | 7, 8 | mpbir 146 | . . . . 5 ⊢ {𝑥 ∈ 𝐼 ∣ 0 ∈ ℕ} = ∅ |
| 10 | 5, 9 | eqtri 2259 | . . . 4 ⊢ (◡(𝑥 ∈ 𝐼 ↦ 0) “ ℕ) = ∅ |
| 11 | 0fi 7193 | . . . 4 ⊢ ∅ ∈ Fin | |
| 12 | 10, 11 | eqeltri 2311 | . . 3 ⊢ (◡(𝑥 ∈ 𝐼 ↦ 0) “ ℕ) ∈ Fin |
| 13 | 12 | a1i 9 | . 2 ⊢ (𝐼 ∈ 𝑉 → (◡(𝑥 ∈ 𝐼 ↦ 0) “ ℕ) ∈ Fin) |
| 14 | psrbag.d | . . 3 ⊢ 𝐷 = {𝑓 ∈ (ℕ0 ↑𝑚 𝐼) ∣ (◡𝑓 “ ℕ) ∈ Fin} | |
| 15 | 14 | psrbag 15165 | . 2 ⊢ (𝐼 ∈ 𝑉 → ((𝑥 ∈ 𝐼 ↦ 0) ∈ 𝐷 ↔ ((𝑥 ∈ 𝐼 ↦ 0):𝐼⟶ℕ0 ∧ (◡(𝑥 ∈ 𝐼 ↦ 0) “ ℕ) ∈ Fin))) |
| 16 | 3, 13, 15 | mpbir2and 957 | 1 ⊢ (𝐼 ∈ 𝑉 → (𝑥 ∈ 𝐼 ↦ 0) ∈ 𝐷) |
| Colors of variables: wff set class |
| This proof depends on syntax axioms: ¬ wn 3 → wi 4 ∧ wa 104 = wceq 1402 ∈ wcel 2209 ∀wral 2528 {crab 2532 ∅c0 3520 ↦ cmpt 4193 ◡ccnv 4775 “ cima 4779 ⟶wf 5376 (class class class)co 6088 ↑𝑚 cmap 6926 Fincfn 7027 0cc0 8186 ℕcn 9314 ℕ0cn0 9575 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-in1 623 ax-in2 624 ax-io 721 ax-5 1500 ax-7 1501 ax-gen 1502 ax-ie1 1546 ax-ie2 1547 ax-8 1557 ax-10 1558 ax-11 1559 ax-i12 1560 ax-bndl 1562 ax-4 1563 ax-17 1579 ax-i9 1583 ax-ial 1587 ax-i5r 1588 ax-14 2212 ax-ext 2220 ax-sep 4251 ax-nul 4261 ax-pow 4313 ax-pr 4348 ax-un 4580 ax-setind 4686 ax-cnex 8277 ax-resscn 8278 ax-1cn 8279 ax-1re 8280 ax-icn 8281 ax-addcl 8282 ax-addrcl 8283 ax-mulcl 8284 ax-i2m1 8291 ax-0lt1 8292 ax-0id 8294 ax-rnegex 8295 ax-pre-ltirr 8298 ax-pre-lttrn 8300 ax-pre-ltadd 8302 |
| This proof depends on definitions: df-bi 117 df-3an 1011 df-tru 1405 df-fal 1408 df-nf 1514 df-sb 1816 df-eu 2089 df-mo 2090 df-clab 2225 df-cleq 2231 df-clel 2234 df-nfc 2381 df-ne 2421 df-nel 2516 df-ral 2533 df-rex 2534 df-rab 2537 df-v 2823 df-sbc 3052 df-dif 3222 df-un 3224 df-in 3226 df-ss 3233 df-nul 3521 df-pw 3690 df-sn 3715 df-pr 3716 df-op 3718 df-uni 3936 df-int 3971 df-br 4132 df-opab 4194 df-mpt 4195 df-id 4440 df-iom 4740 df-xp 4782 df-rel 4783 df-cnv 4784 df-co 4785 df-dm 4786 df-rn 4787 df-res 4788 df-ima 4789 df-iota 5340 df-fun 5382 df-fn 5383 df-f 5384 df-f1 5385 df-fo 5386 df-f1o 5387 df-fv 5388 df-ov 6091 df-oprab 6092 df-mpo 6093 df-map 6928 df-en 7028 df-fin 7030 df-pnf 8369 df-mnf 8370 df-xr 8371 df-ltxr 8372 df-le 8373 df-inn 9315 df-n0 9576 |
| This theorem is used by: psrlidmfi 15204 psrridmfi 15205 |
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