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Theorem psr1baslem 22148
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 3422 . 2 ((ℕ0m 1o) = {𝑓 ∈ (ℕ0m 1o) ∣ (𝑓 “ ℕ) ∈ Fin} ↔ ∀𝑓 ∈ (ℕ0m 1o)(𝑓 “ ℕ) ∈ Fin)
2 df1o2 8412 . . . 4 1o = {∅}
3 snfi 8990 . . . 4 {∅} ∈ Fin
42, 3eqeltri 2832 . . 3 1o ∈ Fin
5 cnvimass 6047 . . . 4 (𝑓 “ ℕ) ⊆ dom 𝑓
6 elmapi 8796 . . . 4 (𝑓 ∈ (ℕ0m 1o) → 𝑓:1o⟶ℕ0)
75, 6fssdm 6687 . . 3 (𝑓 ∈ (ℕ0m 1o) → (𝑓 “ ℕ) ⊆ 1o)
8 ssfi 9107 . . 3 ((1o ∈ Fin ∧ (𝑓 “ ℕ) ⊆ 1o) → (𝑓 “ ℕ) ∈ Fin)
94, 7, 8sylancr 588 . 2 (𝑓 ∈ (ℕ0m 1o) → (𝑓 “ ℕ) ∈ Fin)
101, 9mprgbir 3058 1 (ℕ0m 1o) = {𝑓 ∈ (ℕ0m 1o) ∣ (𝑓 “ ℕ) ∈ Fin}
Colors of variables: wff setvar class
Syntax hints:   = wceq 1542  wcel 2114  {crab 3389  wss 3889  c0 4273  {csn 4567  ccnv 5630  cima 5634  (class class class)co 7367  1oc1o 8398  m cmap 8773  Fincfn 8893  cn 12174  0cn0 12437
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 2708  ax-sep 5231  ax-nul 5241  ax-pow 5307  ax-pr 5375  ax-un 7689
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 2539  df-eu 2569  df-clab 2715  df-cleq 2728  df-clel 2811  df-nfc 2885  df-ne 2933  df-ral 3052  df-rex 3062  df-reu 3343  df-rab 3390  df-v 3431  df-sbc 3729  df-csb 3838  df-dif 3892  df-un 3894  df-in 3896  df-ss 3906  df-pss 3909  df-nul 4274  df-if 4467  df-pw 4543  df-sn 4568  df-pr 4570  df-op 4574  df-uni 4851  df-iun 4935  df-br 5086  df-opab 5148  df-mpt 5167  df-tr 5193  df-id 5526  df-eprel 5531  df-po 5539  df-so 5540  df-fr 5584  df-we 5586  df-xp 5637  df-rel 5638  df-cnv 5639  df-co 5640  df-dm 5641  df-rn 5642  df-res 5643  df-ima 5644  df-ord 6326  df-on 6327  df-lim 6328  df-suc 6329  df-iota 6454  df-fun 6500  df-fn 6501  df-f 6502  df-f1 6503  df-fo 6504  df-f1o 6505  df-fv 6506  df-ov 7370  df-oprab 7371  df-mpo 7372  df-om 7818  df-1st 7942  df-2nd 7943  df-1o 8405  df-map 8775  df-en 8894  df-fin 8897
This theorem is referenced by:  psr1bas  22154  ply1basf  22166  ply1plusgfvi  22205  coe1z  22228  coe1mul2  22234  coe1tm  22238  ply1coe  22263  rhmply1vsca  22353  deg1ldg  26057  deg1leb  26060  deg1val  26061
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