MPE Home Metamath Proof Explorer < Previous   Next >
Nearby theorems
Mirrors  >  Home  >  MPE Home  >  Th. List  >  tpf Structured version   Visualization version   GIF version

Theorem tpf 14543
Description: A function into a (proper) triple. (Contributed by AV, 20-Jul-2025.)
Hypotheses
Ref Expression
tpf1o.f 𝐹 = (𝑥 ∈ (0..^3) ↦ if(𝑥 = 0, 𝐴, if(𝑥 = 1, 𝐵, 𝐶)))
tpf.t 𝑇 = {𝐴, 𝐵, 𝐶}
Assertion
Ref Expression
tpf ((𝐴𝑉𝐵𝑉𝐶𝑉) → 𝐹:(0..^3)⟶𝑇)
Distinct variable groups:   𝑥,𝐴   𝑥,𝑉   𝑥,𝐵   𝑥,𝐶   𝑥,𝑇
Allowed substitution hint:   𝐹(𝑥)

Proof of Theorem tpf
StepHypRef Expression
1 tpid1g 4734 . . . . . 6 (𝐴𝑉𝐴 ∈ {𝐴, 𝐵, 𝐶})
213ad2ant1 1150 . . . . 5 ((𝐴𝑉𝐵𝑉𝐶𝑉) → 𝐴 ∈ {𝐴, 𝐵, 𝐶})
3 tpid2g 4736 . . . . . . 7 (𝐵𝑉𝐵 ∈ {𝐴, 𝐵, 𝐶})
433ad2ant2 1151 . . . . . 6 ((𝐴𝑉𝐵𝑉𝐶𝑉) → 𝐵 ∈ {𝐴, 𝐵, 𝐶})
5 tpid3g 4737 . . . . . . 7 (𝐶𝑉𝐶 ∈ {𝐴, 𝐵, 𝐶})
653ad2ant3 1152 . . . . . 6 ((𝐴𝑉𝐵𝑉𝐶𝑉) → 𝐶 ∈ {𝐴, 𝐵, 𝐶})
74, 6ifcld 4533 . . . . 5 ((𝐴𝑉𝐵𝑉𝐶𝑉) → if(𝑥 = 1, 𝐵, 𝐶) ∈ {𝐴, 𝐵, 𝐶})
82, 7ifcld 4533 . . . 4 ((𝐴𝑉𝐵𝑉𝐶𝑉) → if(𝑥 = 0, 𝐴, if(𝑥 = 1, 𝐵, 𝐶)) ∈ {𝐴, 𝐵, 𝐶})
9 tpf.t . . . 4 𝑇 = {𝐴, 𝐵, 𝐶}
108, 9eleqtrrdi 2873 . . 3 ((𝐴𝑉𝐵𝑉𝐶𝑉) → if(𝑥 = 0, 𝐴, if(𝑥 = 1, 𝐵, 𝐶)) ∈ 𝑇)
1110adantr 485 . 2 (((𝐴𝑉𝐵𝑉𝐶𝑉) ∧ 𝑥 ∈ (0..^3)) → if(𝑥 = 0, 𝐴, if(𝑥 = 1, 𝐵, 𝐶)) ∈ 𝑇)
12 tpf1o.f . 2 𝐹 = (𝑥 ∈ (0..^3) ↦ if(𝑥 = 0, 𝐴, if(𝑥 = 1, 𝐵, 𝐶)))
1311, 12fmptd 7109 1 ((𝐴𝑉𝐵𝑉𝐶𝑉) → 𝐹:(0..^3)⟶𝑇)
Colors of variables:    wff setvar class
This proof depends on syntax axioms:  wi 4  w3a 1102   = wceq 1569  wcel 2142  ifcif 4486  {ctp 4592  cmpt 5191  wf 6532  (class class class)co 7412  0cc0 11106  1c1 11107  3c3 12302  ..^cfzo 13689
This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1824  ax-4 1838  ax-5 1939  ax-6 1996  ax-7 2037  ax-8 2144  ax-9 2152  ax-10 2175  ax-11 2191  ax-12 2212  ax-ext 2734  ax-sep 5256  ax-pr 5403
This proof depends on definitions:  df-bi 210  df-an 401  df-or 861  df-3or 1103  df-3an 1104  df-tru 1572  df-fal 1582  df-ex 1809  df-nf 1813  df-sb 2096  df-mo 2566  df-eu 2596  df-clab 2741  df-cleq 2754  df-clel 2837  df-nfc 2911  df-ral 3079  df-rex 3089  df-rab 3416  df-v 3456  df-dif 3907  df-un 3909  df-in 3911  df-ss 3921  df-nul 4286  df-if 4487  df-sn 4589  df-pr 4591  df-tp 4593  df-op 4595  df-br 5109  df-opab 5173  df-mpt 5192  df-id 5555  df-xp 5666  df-rel 5667  df-cnv 5668  df-co 5669  df-dm 5670  df-rn 5671  df-res 5672  df-ima 5673  df-fun 6538  df-fn 6539  df-f 6540
This theorem is used by:  tpfo  14544
  Copyright terms: Public domain W3C validator