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

Theorem riotaexg 5974
Description: Restricted iota is a set. (Contributed by Jim Kingdon, 15-Jun-2020.)
Assertion
Ref Expression
riotaexg (𝐴𝑉 → (𝑥𝐴 𝜓) ∈ V)
Distinct variable group:   𝑥,𝐴
Allowed substitution hints:   𝜓(𝑥)   𝑉(𝑥)

Proof of Theorem riotaexg
StepHypRef Expression
1 df-riota 5970 . 2 (𝑥𝐴 𝜓) = (℩𝑥(𝑥𝐴𝜓))
2 uniexg 4536 . . 3 (𝐴𝑉 𝐴 ∈ V)
3 iotass 5304 . . . . 5 (∀𝑥((𝑥𝐴𝜓) → 𝑥 𝐴) → (℩𝑥(𝑥𝐴𝜓)) ⊆ 𝐴)
4 elssuni 3921 . . . . . 6 (𝑥𝐴𝑥 𝐴)
54adantr 276 . . . . 5 ((𝑥𝐴𝜓) → 𝑥 𝐴)
63, 5mpg 1499 . . . 4 (℩𝑥(𝑥𝐴𝜓)) ⊆ 𝐴
76a1i 9 . . 3 (𝐴𝑉 → (℩𝑥(𝑥𝐴𝜓)) ⊆ 𝐴)
82, 7ssexd 4229 . 2 (𝐴𝑉 → (℩𝑥(𝑥𝐴𝜓)) ∈ V)
91, 8eqeltrid 2318 1 (𝐴𝑉 → (𝑥𝐴 𝜓) ∈ V)
Colors of variables: wff set class
Syntax hints:  wi 4  wa 104  wcel 2202  Vcvv 2802  wss 3200   cuni 3893  cio 5284  crio 5969
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-io 716  ax-5 1495  ax-7 1496  ax-gen 1497  ax-ie1 1541  ax-ie2 1542  ax-8 1552  ax-10 1553  ax-11 1554  ax-i12 1555  ax-bndl 1557  ax-4 1558  ax-17 1574  ax-i9 1578  ax-ial 1582  ax-i5r 1583  ax-13 2204  ax-14 2205  ax-ext 2213  ax-sep 4207  ax-un 4530
This theorem depends on definitions:  df-bi 117  df-tru 1400  df-nf 1509  df-sb 1811  df-clab 2218  df-cleq 2224  df-clel 2227  df-nfc 2363  df-ral 2515  df-rex 2516  df-v 2804  df-un 3204  df-in 3206  df-ss 3213  df-pw 3654  df-sn 3675  df-pr 3676  df-uni 3894  df-iota 5286  df-riota 5970
This theorem is referenced by:  iotaexel  5975  flval  10531  sqrtrval  11560  qnumval  12756  qdenval  12757  grpidvalg  13455  fn0g  13457  grpinvval  13625  grpinvfng  13626  usgredg2v  16074
  Copyright terms: Public domain W3C validator