Theorem psrbagf 22033

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 2861	. 2 ⊢ (𝐹 ∈ 𝐷 ↔ 𝐹 ∈ {𝑓 ∈ (ℕ0 ↑m 𝐼) ∣ (◡𝑓 “ ℕ) ∈ Fin})
3		elrabi 3655	. . 3 ⊢ (𝐹 ∈ {𝑓 ∈ (ℕ0 ↑m 𝐼) ∣ (◡𝑓 “ ℕ) ∈ Fin} → 𝐹 ∈ (ℕ0 ↑m 𝐼))
4		elmapi 8842	. . 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 1567   ∈ wcel 2149  {crab 3423  ^◡ccnv 5658   “ cima 5662  ⟶wf 6529  (class class class)co 7408   ↑_m cmap 8820  Fincfn 8939  ℕcn 12229  ℕ₀cn0 12500

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1822  ax-4 1836  ax-5 1937  ax-6 1994  ax-7 2035  ax-8 2151  ax-9 2159  ax-10 2182  ax-11 2198  ax-12 2219  ax-ext 2741  ax-sep 5258  ax-nul 5268  ax-pow 5334  ax-pr 5402  ax-un 7730

This theorem depends on definitions:  df-bi 210  df-an 401  df-or 861  df-3an 1103  df-tru 1570  df-fal 1580  df-ex 1807  df-nf 1811  df-sb 2098  df-mo 2573  df-eu 2603  df-clab 2748  df-cleq 2761  df-clel 2844  df-nfc 2918  df-ne 2965  df-ral 3086  df-rex 3096  df-rab 3424  df-v 3465  df-sbc 3754  df-csb 3862  df-dif 3916  df-un 3918  df-in 3920  df-ss 3930  df-nul 4295  df-if 4490  df-pw 4566  df-sn 4592  df-pr 4594  df-op 4598  df-uni 4874  df-iun 4959  df-br 5111  df-opab 5175  df-mpt 5194  df-id 5554  df-xp 5665  df-rel 5666  df-cnv 5667  df-co 5668  df-dm 5669  df-rn 5670  df-res 5671  df-ima 5672  df-iota 6489  df-fun 6535  df-fn 6536  df-f 6537  df-fv 6541  df-ov 7411  df-oprab 7412  df-mpo 7413  df-1st 7982  df-2nd 7983  df-map 8822

This theorem is referenced by:  psrbagfsupp  22034  psrbaglesupp  22037  psrbaglecl  22038  psrbagaddcl  22039  psrbagcon  22040  psrbaglefi  22041  psrbagconcl  22042  psrbagleadd1  22043  psrbagconf1o  22044  psrbagres  22045  gsumbagdiaglem  22046  psrass1lem  22048  rhmpsrlem2  22056  psrlidm  22076  psrridm  22077  psrass1  22078  psrcom  22082  mplsubrglem  22118  mplmonmul  22152  psrbagev1  22193  evlslem3  22196  evlslem1  22198  evlsvvvallem  22207  evlsvvval  22209  selvvvval  22258  mhpmulcl  22277  psdcl  22289  psdmplcl  22290  psdadd  22291  psdvsca  22292  psdmul  22294  psdmvr  22297  psropprmul  22362  tdeglem1  26180  tdeglem3  26181  tdeglem4  26182  mdegmullem  26200  mplvrpmfgalem  33875  psrmonmul  33881  evlselvlem  43205  evlselv  43206  mhphflem  43213  mhphf  43214