ILE Home Intuitionistic Logic Explorer < Previous   Next >
Nearby theorems
Mirrors  >  Home  >  ILE Home  >  Th. List  >  resunimafz0 GIF version

Theorem resunimafz0 10923
Description: The union of a restriction by an image over an open range of nonnegative integers and a singleton of an ordered pair is a restriction by an image over an interval of nonnegative integers. (Contributed by Mario Carneiro, 8-Apr-2015.) (Revised by AV, 20-Feb-2021.)
Hypotheses
Ref Expression
resunimafz0.i (𝜑 → Fun 𝐼)
resunimafz0.f (𝜑𝐹:(0..^(♯‘𝐹))⟶dom 𝐼)
resunimafz0.n (𝜑𝑁 ∈ (0..^(♯‘𝐹)))
Assertion
Ref Expression
resunimafz0 (𝜑 → (𝐼 ↾ (𝐹 “ (0...𝑁))) = ((𝐼 ↾ (𝐹 “ (0..^𝑁))) ∪ {⟨(𝐹𝑁), (𝐼‘(𝐹𝑁))⟩}))

Proof of Theorem resunimafz0
StepHypRef Expression
1 imaundi 5082 . . . . 5 (𝐹 “ ((0..^𝑁) ∪ {𝑁})) = ((𝐹 “ (0..^𝑁)) ∪ (𝐹 “ {𝑁}))
2 resunimafz0.n . . . . . . . . 9 (𝜑𝑁 ∈ (0..^(♯‘𝐹)))
3 elfzonn0 10262 . . . . . . . . 9 (𝑁 ∈ (0..^(♯‘𝐹)) → 𝑁 ∈ ℕ0)
42, 3syl 14 . . . . . . . 8 (𝜑𝑁 ∈ ℕ0)
5 elnn0uz 9639 . . . . . . . 8 (𝑁 ∈ ℕ0𝑁 ∈ (ℤ‘0))
64, 5sylib 122 . . . . . . 7 (𝜑𝑁 ∈ (ℤ‘0))
7 fzisfzounsn 10312 . . . . . . 7 (𝑁 ∈ (ℤ‘0) → (0...𝑁) = ((0..^𝑁) ∪ {𝑁}))
86, 7syl 14 . . . . . 6 (𝜑 → (0...𝑁) = ((0..^𝑁) ∪ {𝑁}))
98imaeq2d 5009 . . . . 5 (𝜑 → (𝐹 “ (0...𝑁)) = (𝐹 “ ((0..^𝑁) ∪ {𝑁})))
10 resunimafz0.f . . . . . . . 8 (𝜑𝐹:(0..^(♯‘𝐹))⟶dom 𝐼)
1110ffnd 5408 . . . . . . 7 (𝜑𝐹 Fn (0..^(♯‘𝐹)))
12 fnsnfv 5620 . . . . . . 7 ((𝐹 Fn (0..^(♯‘𝐹)) ∧ 𝑁 ∈ (0..^(♯‘𝐹))) → {(𝐹𝑁)} = (𝐹 “ {𝑁}))
1311, 2, 12syl2anc 411 . . . . . 6 (𝜑 → {(𝐹𝑁)} = (𝐹 “ {𝑁}))
1413uneq2d 3317 . . . . 5 (𝜑 → ((𝐹 “ (0..^𝑁)) ∪ {(𝐹𝑁)}) = ((𝐹 “ (0..^𝑁)) ∪ (𝐹 “ {𝑁})))
151, 9, 143eqtr4a 2255 . . . 4 (𝜑 → (𝐹 “ (0...𝑁)) = ((𝐹 “ (0..^𝑁)) ∪ {(𝐹𝑁)}))
1615reseq2d 4946 . . 3 (𝜑 → (𝐼 ↾ (𝐹 “ (0...𝑁))) = (𝐼 ↾ ((𝐹 “ (0..^𝑁)) ∪ {(𝐹𝑁)})))
17 resundi 4959 . . 3 (𝐼 ↾ ((𝐹 “ (0..^𝑁)) ∪ {(𝐹𝑁)})) = ((𝐼 ↾ (𝐹 “ (0..^𝑁))) ∪ (𝐼 ↾ {(𝐹𝑁)}))
1816, 17eqtrdi 2245 . 2 (𝜑 → (𝐼 ↾ (𝐹 “ (0...𝑁))) = ((𝐼 ↾ (𝐹 “ (0..^𝑁))) ∪ (𝐼 ↾ {(𝐹𝑁)})))
19 resunimafz0.i . . . . 5 (𝜑 → Fun 𝐼)
20 funfn 5288 . . . . 5 (Fun 𝐼𝐼 Fn dom 𝐼)
2119, 20sylib 122 . . . 4 (𝜑𝐼 Fn dom 𝐼)
2210, 2ffvelcdmd 5698 . . . 4 (𝜑 → (𝐹𝑁) ∈ dom 𝐼)
23 fnressn 5748 . . . 4 ((𝐼 Fn dom 𝐼 ∧ (𝐹𝑁) ∈ dom 𝐼) → (𝐼 ↾ {(𝐹𝑁)}) = {⟨(𝐹𝑁), (𝐼‘(𝐹𝑁))⟩})
2421, 22, 23syl2anc 411 . . 3 (𝜑 → (𝐼 ↾ {(𝐹𝑁)}) = {⟨(𝐹𝑁), (𝐼‘(𝐹𝑁))⟩})
2524uneq2d 3317 . 2 (𝜑 → ((𝐼 ↾ (𝐹 “ (0..^𝑁))) ∪ (𝐼 ↾ {(𝐹𝑁)})) = ((𝐼 ↾ (𝐹 “ (0..^𝑁))) ∪ {⟨(𝐹𝑁), (𝐼‘(𝐹𝑁))⟩}))
2618, 25eqtrd 2229 1 (𝜑 → (𝐼 ↾ (𝐹 “ (0...𝑁))) = ((𝐼 ↾ (𝐹 “ (0..^𝑁))) ∪ {⟨(𝐹𝑁), (𝐼‘(𝐹𝑁))⟩}))
Colors of variables: wff set class
Syntax hints:  wi 4   = wceq 1364  wcel 2167  cun 3155  {csn 3622  cop 3625  dom cdm 4663  cres 4665  cima 4666  Fun wfun 5252   Fn wfn 5253  wf 5254  cfv 5258  (class class class)co 5922  0cc0 7879  0cn0 9249  cuz 9601  ...cfz 10083  ..^cfzo 10217  chash 10867
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 615  ax-in2 616  ax-io 710  ax-5 1461  ax-7 1462  ax-gen 1463  ax-ie1 1507  ax-ie2 1508  ax-8 1518  ax-10 1519  ax-11 1520  ax-i12 1521  ax-bndl 1523  ax-4 1524  ax-17 1540  ax-i9 1544  ax-ial 1548  ax-i5r 1549  ax-13 2169  ax-14 2170  ax-ext 2178  ax-sep 4151  ax-pow 4207  ax-pr 4242  ax-un 4468  ax-setind 4573  ax-cnex 7970  ax-resscn 7971  ax-1cn 7972  ax-1re 7973  ax-icn 7974  ax-addcl 7975  ax-addrcl 7976  ax-mulcl 7977  ax-addcom 7979  ax-addass 7981  ax-distr 7983  ax-i2m1 7984  ax-0lt1 7985  ax-0id 7987  ax-rnegex 7988  ax-cnre 7990  ax-pre-ltirr 7991  ax-pre-ltwlin 7992  ax-pre-lttrn 7993  ax-pre-apti 7994  ax-pre-ltadd 7995
This theorem depends on definitions:  df-bi 117  df-3or 981  df-3an 982  df-tru 1367  df-fal 1370  df-nf 1475  df-sb 1777  df-eu 2048  df-mo 2049  df-clab 2183  df-cleq 2189  df-clel 2192  df-nfc 2328  df-ne 2368  df-nel 2463  df-ral 2480  df-rex 2481  df-reu 2482  df-rab 2484  df-v 2765  df-sbc 2990  df-csb 3085  df-dif 3159  df-un 3161  df-in 3163  df-ss 3170  df-pw 3607  df-sn 3628  df-pr 3629  df-op 3631  df-uni 3840  df-int 3875  df-iun 3918  df-br 4034  df-opab 4095  df-mpt 4096  df-id 4328  df-xp 4669  df-rel 4670  df-cnv 4671  df-co 4672  df-dm 4673  df-rn 4674  df-res 4675  df-ima 4676  df-iota 5219  df-fun 5260  df-fn 5261  df-f 5262  df-f1 5263  df-fo 5264  df-f1o 5265  df-fv 5266  df-riota 5877  df-ov 5925  df-oprab 5926  df-mpo 5927  df-1st 6198  df-2nd 6199  df-pnf 8063  df-mnf 8064  df-xr 8065  df-ltxr 8066  df-le 8067  df-sub 8199  df-neg 8200  df-inn 8991  df-n0 9250  df-z 9327  df-uz 9602  df-fz 10084  df-fzo 10218
This theorem is referenced by: (None)
  Copyright terms: Public domain W3C validator