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Theorem psr1baslem 22137
Description: The set of finite bags on 1o is just the set of all functions from 1o to 0. (Contributed by Mario Carneiro, 9-Feb-2015.)
Assertion
Ref Expression
psr1baslem (ℕ0m 1o) = {𝑓 ∈ (ℕ0m 1o) ∣ (𝑓 “ ℕ) ∈ Fin}

Proof of Theorem psr1baslem
StepHypRef Expression
1 rabid2 3434 . 2 ((ℕ0m 1o) = {𝑓 ∈ (ℕ0m 1o) ∣ (𝑓 “ ℕ) ∈ Fin} ↔ ∀𝑓 ∈ (ℕ0m 1o)(𝑓 “ ℕ) ∈ Fin)
2 df1o2 8414 . . . 4 1o = {∅}
3 snfi 8992 . . . 4 {∅} ∈ Fin
42, 3eqeltri 2833 . . 3 1o ∈ Fin
5 cnvimass 6049 . . . 4 (𝑓 “ ℕ) ⊆ dom 𝑓
6 elmapi 8798 . . . 4 (𝑓 ∈ (ℕ0m 1o) → 𝑓:1o⟶ℕ0)
75, 6fssdm 6689 . . 3 (𝑓 ∈ (ℕ0m 1o) → (𝑓 “ ℕ) ⊆ 1o)
8 ssfi 9109 . . 3 ((1o ∈ Fin ∧ (𝑓 “ ℕ) ⊆ 1o) → (𝑓 “ ℕ) ∈ Fin)
94, 7, 8sylancr 588 . 2 (𝑓 ∈ (ℕ0m 1o) → (𝑓 “ ℕ) ∈ Fin)
101, 9mprgbir 3059 1 (ℕ0m 1o) = {𝑓 ∈ (ℕ0m 1o) ∣ (𝑓 “ ℕ) ∈ Fin}
Colors of variables: wff setvar class
Syntax hints:   = wceq 1542  wcel 2114  {crab 3401  wss 3903  c0 4287  {csn 4582  ccnv 5631  cima 5635  (class class class)co 7368  1oc1o 8400  m cmap 8775  Fincfn 8895  cn 12157  0cn0 12413
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1797  ax-4 1811  ax-5 1912  ax-6 1969  ax-7 2010  ax-8 2116  ax-9 2124  ax-10 2147  ax-11 2163  ax-12 2185  ax-ext 2709  ax-sep 5243  ax-nul 5253  ax-pow 5312  ax-pr 5379  ax-un 7690
This theorem depends on definitions:  df-bi 207  df-an 396  df-or 849  df-3or 1088  df-3an 1089  df-tru 1545  df-fal 1555  df-ex 1782  df-nf 1786  df-sb 2069  df-mo 2540  df-eu 2570  df-clab 2716  df-cleq 2729  df-clel 2812  df-nfc 2886  df-ne 2934  df-ral 3053  df-rex 3063  df-reu 3353  df-rab 3402  df-v 3444  df-sbc 3743  df-csb 3852  df-dif 3906  df-un 3908  df-in 3910  df-ss 3920  df-pss 3923  df-nul 4288  df-if 4482  df-pw 4558  df-sn 4583  df-pr 4585  df-op 4589  df-uni 4866  df-iun 4950  df-br 5101  df-opab 5163  df-mpt 5182  df-tr 5208  df-id 5527  df-eprel 5532  df-po 5540  df-so 5541  df-fr 5585  df-we 5587  df-xp 5638  df-rel 5639  df-cnv 5640  df-co 5641  df-dm 5642  df-rn 5643  df-res 5644  df-ima 5645  df-ord 6328  df-on 6329  df-lim 6330  df-suc 6331  df-iota 6456  df-fun 6502  df-fn 6503  df-f 6504  df-f1 6505  df-fo 6506  df-f1o 6507  df-fv 6508  df-ov 7371  df-oprab 7372  df-mpo 7373  df-om 7819  df-1st 7943  df-2nd 7944  df-1o 8407  df-map 8777  df-en 8896  df-fin 8899
This theorem is referenced by:  psr1bas  22143  ply1basf  22155  ply1plusgfvi  22194  coe1z  22217  coe1mul2  22223  coe1tm  22227  ply1coe  22254  rhmply1vsca  22344  deg1ldg  26065  deg1leb  26068  deg1val  26069
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