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Theorem psrbagfsupp 15038
Description: Finite bags have finite support. (Contributed by Stefan O'Rear, 9-Mar-2015.) (Revised by AV, 18-Jul-2019.) Remove a sethood antecedent. (Revised by SN, 7-Aug-2024.)
Hypothesis
Ref Expression
psrbag.d 𝐷 = {𝑓 ∈ (ℕ0𝑚 𝐼) ∣ (𝑓 “ ℕ) ∈ Fin}
Assertion
Ref Expression
psrbagfsupp (𝐹𝐷𝐹 finSupp 0)
Distinct variable groups:   𝑓,𝐹   𝑓,𝐼
Allowed substitution hint:   𝐷(𝑓)

Proof of Theorem psrbagfsupp
StepHypRef Expression
1 id 19 . . . . 5 (𝐹𝐷𝐹𝐷)
2 psrbag.d . . . . . . 7 𝐷 = {𝑓 ∈ (ℕ0𝑚 𝐼) ∣ (𝑓 “ ℕ) ∈ Fin}
32psrbagf 15037 . . . . . 6 (𝐹𝐷𝐹:𝐼⟶ℕ0)
43ffnd 5532 . . . . 5 (𝐹𝐷𝐹 Fn 𝐼)
51, 4fndmexd 5579 . . . 4 (𝐹𝐷𝐼 ∈ V)
62psrbag 15036 . . . . 5 (𝐼 ∈ V → (𝐹𝐷 ↔ (𝐹:𝐼⟶ℕ0 ∧ (𝐹 “ ℕ) ∈ Fin)))
76biimpa 296 . . . 4 ((𝐼 ∈ V ∧ 𝐹𝐷) → (𝐹:𝐼⟶ℕ0 ∧ (𝐹 “ ℕ) ∈ Fin))
85, 7mpancom 426 . . 3 (𝐹𝐷 → (𝐹:𝐼⟶ℕ0 ∧ (𝐹 “ ℕ) ∈ Fin))
98simprd 114 . 2 (𝐹𝐷 → (𝐹 “ ℕ) ∈ Fin)
10 fcdmnn0fsuppg 9601 . . 3 ((𝐹𝐷𝐹:𝐼⟶ℕ0) → (𝐹 finSupp 0 ↔ (𝐹 “ ℕ) ∈ Fin))
113, 10mpdan 425 . 2 (𝐹𝐷 → (𝐹 finSupp 0 ↔ (𝐹 “ ℕ) ∈ Fin))
129, 11mpbird 167 1 (𝐹𝐷𝐹 finSupp 0)
Colors of variables: wff set class
Syntax hints:  wi 4  wa 104  wb 105   = wceq 1402  wcel 2209  {crab 2532  Vcvv 2821   class class class wbr 4128  ccnv 4771  cima 4775  wf 5371  (class class class)co 6079  𝑚 cmap 6916  Fincfn 7016   finSupp cfsupp 7279  0cc0 8173  cn 9287  0cn0 9546
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 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 4247  ax-pow 4309  ax-pr 4344  ax-un 4576  ax-setind 4682  ax-cnex 8264  ax-resscn 8265  ax-1cn 8266  ax-1re 8267  ax-icn 8268  ax-addcl 8269  ax-addrcl 8270  ax-mulcl 8271  ax-i2m1 8278  ax-0lt1 8279  ax-0id 8281  ax-rnegex 8282  ax-pre-ltirr 8285  ax-pre-lttrn 8287  ax-pre-ltadd 8289
This theorem 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 3714  df-pr 3715  df-op 3717  df-uni 3934  df-int 3969  df-br 4129  df-opab 4191  df-id 4436  df-xp 4778  df-rel 4779  df-cnv 4780  df-co 4781  df-dm 4782  df-rn 4783  df-res 4784  df-ima 4785  df-iota 5335  df-fun 5377  df-fn 5378  df-f 5379  df-fv 5383  df-ov 6082  df-oprab 6083  df-mpo 6084  df-supp 6470  df-map 6918  df-fsupp 7280  df-pnf 8356  df-mnf 8357  df-xr 8358  df-ltxr 8359  df-le 8360  df-inn 9288  df-n0 9547
This theorem is referenced by: (None)
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