Theorem psrbagf 14674

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 2296	. 2 ⊢ (𝐹 ∈ 𝐷 ↔ 𝐹 ∈ {𝑓 ∈ (ℕ0 ↑𝑚 𝐼) ∣ (◡𝑓 “ ℕ) ∈ Fin})
3		elrabi 2957	. . 3 ⊢ (𝐹 ∈ {𝑓 ∈ (ℕ0 ↑𝑚 𝐼) ∣ (◡𝑓 “ ℕ) ∈ Fin} → 𝐹 ∈ (ℕ0 ↑𝑚 𝐼))
4		elmapi 6834	. . 3 ⊢ (𝐹 ∈ (ℕ0 ↑𝑚 𝐼) → 𝐹:𝐼⟶ℕ0)
5	3, 4	syl 14	. 2 ⊢ (𝐹 ∈ {𝑓 ∈ (ℕ0 ↑𝑚 𝐼) ∣ (◡𝑓 “ ℕ) ∈ Fin} → 𝐹:𝐼⟶ℕ0)
6	2, 5	sylbi 121	1 ⊢ (𝐹 ∈ 𝐷 → 𝐹:𝐼⟶ℕ0)

Syntax hints:   → wi 4   = wceq 1395   ∈ wcel 2200  {crab 2512  ^◡ccnv 4722   “ cima 4726  ⟶wf 5320  (class class class)co 6013   ↑_𝑚 cmap 6812  Fincfn 6904  ℕcn 9133  ℕ₀cn0 9392

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-in1 617  ax-in2 618  ax-io 714  ax-5 1493  ax-7 1494  ax-gen 1495  ax-ie1 1539  ax-ie2 1540  ax-8 1550  ax-10 1551  ax-11 1552  ax-i12 1553  ax-bndl 1555  ax-4 1556  ax-17 1572  ax-i9 1576  ax-ial 1580  ax-i5r 1581  ax-13 2202  ax-14 2203  ax-ext 2211  ax-sep 4205  ax-pow 4262  ax-pr 4297  ax-un 4528  ax-setind 4633

This theorem depends on definitions:  df-bi 117  df-3an 1004  df-tru 1398  df-fal 1401  df-nf 1507  df-sb 1809  df-eu 2080  df-mo 2081  df-clab 2216  df-cleq 2222  df-clel 2225  df-nfc 2361  df-ne 2401  df-ral 2513  df-rex 2514  df-rab 2517  df-v 2802  df-sbc 3030  df-dif 3200  df-un 3202  df-in 3204  df-ss 3211  df-pw 3652  df-sn 3673  df-pr 3674  df-op 3676  df-uni 3892  df-br 4087  df-opab 4149  df-id 4388  df-xp 4729  df-rel 4730  df-cnv 4731  df-co 4732  df-dm 4733  df-rn 4734  df-iota 5284  df-fun 5326  df-fn 5327  df-f 5328  df-fv 5332  df-ov 6016  df-oprab 6017  df-mpo 6018  df-map 6814

This theorem is referenced by: (None)