Theorem psrbagf 22049

Description: A finite bag is a function. (Contributed by Mario Carneiro, 29-Dec-2014.) Remove a sethood antecedent. (Revised by SN, 30-Jul-2024.)

Hypothesis

Ref	Expression
psrbag.d	⊢ 𝐷 = {𝑓 ∈ (ℕ0 ↑m 𝐼) ∣ (◡𝑓 “ ℕ) ∈ Fin}

Assertion

Ref	Expression
psrbagf	⊢ (𝐹 ∈ 𝐷 → 𝐹:𝐼⟶ℕ0)

Distinct variable groups:   𝑓,𝐹   𝑓,𝐼

Allowed substitution hint:   𝐷(𝑓)

Proof of Theorem psrbagf

Step	Hyp	Ref	Expression
1		psrbag.d	. . 3 ⊢ 𝐷 = {𝑓 ∈ (ℕ0 ↑m 𝐼) ∣ (◡𝑓 “ ℕ) ∈ Fin}
2	1	eleq2i 2855	. 2 ⊢ (𝐹 ∈ 𝐷 ↔ 𝐹 ∈ {𝑓 ∈ (ℕ0 ↑m 𝐼) ∣ (◡𝑓 “ ℕ) ∈ Fin})
3		elrabi 3647	. . 3 ⊢ (𝐹 ∈ {𝑓 ∈ (ℕ0 ↑m 𝐼) ∣ (◡𝑓 “ ℕ) ∈ Fin} → 𝐹 ∈ (ℕ0 ↑m 𝐼))
4		elmapi 8847	. . 3 ⊢ (𝐹 ∈ (ℕ0 ↑m 𝐼) → 𝐹:𝐼⟶ℕ0)
5	3, 4	syl 18	. 2 ⊢ (𝐹 ∈ {𝑓 ∈ (ℕ0 ↑m 𝐼) ∣ (◡𝑓 “ ℕ) ∈ Fin} → 𝐹:𝐼⟶ℕ0)
6	2, 5	sylbi 220	1 ⊢ (𝐹 ∈ 𝐷 → 𝐹:𝐼⟶ℕ0)

Syntax hints:   → wi 4   = wceq 1570   ∈ wcel 2143  {crab 3416  ^◡ccnv 5662   “ cima 5666  ⟶wf 6534  (class class class)co 7412   ↑_m cmap 8825  Fincfn 8944  ℕcn 12234  ℕ₀cn0 12505

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1825  ax-4 1839  ax-5 1940  ax-6 1997  ax-7 2038  ax-8 2145  ax-9 2153  ax-10 2176  ax-11 2192  ax-12 2213  ax-ext 2735  ax-sep 5258  ax-nul 5270  ax-pow 5338  ax-pr 5406  ax-un 7734

This theorem depends on definitions:  df-bi 210  df-an 401  df-or 861  df-3an 1105  df-tru 1573  df-fal 1583  df-ex 1810  df-nf 1814  df-sb 2097  df-mo 2567  df-eu 2597  df-clab 2742  df-cleq 2755  df-clel 2838  df-nfc 2912  df-ne 2959  df-ral 3080  df-rex 3090  df-rab 3417  df-v 3457  df-sbc 3746  df-csb 3855  df-dif 3909  df-un 3911  df-in 3913  df-ss 3923  df-nul 4288  df-if 4489  df-pw 4565  df-sn 4591  df-pr 4593  df-op 4597  df-uni 4874  df-iun 4959  df-br 5111  df-opab 5175  df-mpt 5194  df-id 5558  df-xp 5669  df-rel 5670  df-cnv 5671  df-co 5672  df-dm 5673  df-rn 5674  df-res 5675  df-ima 5676  df-iota 6494  df-fun 6540  df-fn 6541  df-f 6542  df-fv 6546  df-ov 7415  df-oprab 7416  df-mpo 7417  df-1st 7987  df-2nd 7988  df-map 8827

This theorem is referenced by:  psrbagfsupp  22050  psrbaglesupp  22053  psrbaglecl  22054  psrbagaddcl  22055  psrbagcon  22056  psrbaglefi  22057  psrbagconcl  22058  psrbagleadd1  22059  psrbagconf1o  22060  psrbagres  22061  gsumbagdiaglem  22062  psrass1lem  22064  rhmpsrlem2  22072  psrlidm  22092  psrridm  22093  psrass1  22094  psrcom  22098  mplsubrglem  22134  mplmonmul  22168  psrbagev1  22209  evlslem3  22212  evlslem1  22214  evlsvvvallem  22223  evlsvvval  22225  selvvvval  22274  mhpmulcl  22293  psdcl  22305  psdmplcl  22306  psdadd  22307  psdvsca  22308  psdmul  22310  psdmvr  22313  psropprmul  22378  tdeglem1  26196  tdeglem3  26197  tdeglem4  26198  mdegmullem  26216  mplvrpmfgalem  33915  psrmonmul  33921  evlselvlem  43303  evlselv  43304  mhphflem  43311  mhphf  43312