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Theorem riotacl 5986
Description: Closure of restricted iota. (Contributed by NM, 21-Aug-2011.)
Assertion
Ref Expression
riotacl (∃!𝑥𝐴 𝜑 → (𝑥𝐴 𝜑) ∈ 𝐴)
Distinct variable group:   𝑥,𝐴
Allowed substitution hint:   𝜑(𝑥)

Proof of Theorem riotacl
StepHypRef Expression
1 ssrab2 3312 . 2 {𝑥𝐴𝜑} ⊆ 𝐴
2 riotacl2 5985 . 2 (∃!𝑥𝐴 𝜑 → (𝑥𝐴 𝜑) ∈ {𝑥𝐴𝜑})
31, 2sselid 3225 1 (∃!𝑥𝐴 𝜑 → (𝑥𝐴 𝜑) ∈ 𝐴)
Colors of variables: wff set class
Syntax hints:  wi 4  wcel 2202  ∃!wreu 2512  {crab 2514  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-ext 2213
This theorem depends on definitions:  df-bi 117  df-tru 1400  df-nf 1509  df-sb 1811  df-eu 2082  df-clab 2218  df-cleq 2224  df-clel 2227  df-nfc 2363  df-rex 2516  df-reu 2517  df-rab 2519  df-v 2804  df-sbc 3032  df-un 3204  df-in 3206  df-ss 3213  df-sn 3675  df-pr 3676  df-uni 3894  df-iota 5286  df-riota 5970
This theorem is referenced by:  riotaeqimp  5995  riotaprop  5996  riotass2  5999  riotass  6000  acexmidlemcase  6012  supclti  7196  caucvgsrlemcl  8008  caucvgsrlemgt1  8014  axcaucvglemcl  8114  subval  8370  subcl  8377  divvalap  8853  divclap  8857  lbcl  9125  divfnzn  9854  flqcl  10532  flapcl  10534  cjval  11405  cjth  11406  cjf  11407  oddpwdclemodd  12743  oddpwdclemdc  12744  oddpwdc  12745  qnumdencl  12758  qnumdenbi  12763  ismgmid  13459  grpinvf  13629  uspgredg2vlem  16070  usgredg2vlem1  16072
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