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Theorem riotacl 6044
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 3333 . 2 {𝑥𝐴𝜑} ⊆ 𝐴
2 riotacl2 6043 . 2 (∃!𝑥𝐴 𝜑 → (𝑥𝐴 𝜑) ∈ {𝑥𝐴𝜑})
31, 2sselid 3246 1 (∃!𝑥𝐴 𝜑 → (𝑥𝐴 𝜑) ∈ 𝐴)
Colors of variables: wff set class
Syntax hints:  wi 4  wcel 2209  ∃!wreu 2530  {crab 2532  crio 6027
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 721  ax-5 1500  ax-7 1501  ax-gen 1502  ax-ie1 1546  ax-ie2 1547  ax-8 1557  ax-10 1558  ax-11 1559  ax-i12 1560  ax-bndl 1562  ax-4 1563  ax-17 1579  ax-i9 1583  ax-ial 1587  ax-i5r 1588  ax-ext 2220
This theorem depends on definitions:  df-bi 117  df-tru 1405  df-nf 1514  df-sb 1816  df-eu 2089  df-clab 2225  df-cleq 2231  df-clel 2234  df-nfc 2381  df-rex 2534  df-reu 2535  df-rab 2537  df-v 2823  df-sbc 3052  df-un 3224  df-in 3226  df-ss 3233  df-sn 3711  df-pr 3712  df-uni 3931  df-iota 5332  df-riota 6028
This theorem is referenced by:  riotaeqimp  6053  riotaprop  6054  riotass2  6057  riotass  6058  acexmidlemcase  6070  supclti  7328  caucvgsrlemcl  8146  caucvgsrlemgt1  8152  axcaucvglemcl  8252  subval  8508  subcl  8515  divvalap  8994  divclap  8998  lbcl  9266  divfnzn  10000  flqcl  10686  flapcl  10688  cjval  11588  cjth  11589  cjf  11590  oddpwdclemodd  12928  oddpwdclemdc  12929  oddpwdc  12930  qnumdencl  12943  qnumdenbi  12948  ismgmid  13674  grpinvf  13829  uspgredg2vlem  16375  usgredg2vlem1  16377
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