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Theorem riotacl 5737
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 3177 . 2 {𝑥𝐴𝜑} ⊆ 𝐴
2 riotacl2 5736 . 2 (∃!𝑥𝐴 𝜑 → (𝑥𝐴 𝜑) ∈ {𝑥𝐴𝜑})
31, 2sseldi 3090 1 (∃!𝑥𝐴 𝜑 → (𝑥𝐴 𝜑) ∈ 𝐴)
Colors of variables: wff set class
Syntax hints:  wi 4  wcel 1480  ∃!wreu 2416  {crab 2418  crio 5722
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 105  ax-ia2 106  ax-ia3 107  ax-io 698  ax-5 1423  ax-7 1424  ax-gen 1425  ax-ie1 1469  ax-ie2 1470  ax-8 1482  ax-10 1483  ax-11 1484  ax-i12 1485  ax-bndl 1486  ax-4 1487  ax-17 1506  ax-i9 1510  ax-ial 1514  ax-i5r 1515  ax-ext 2119
This theorem depends on definitions:  df-bi 116  df-tru 1334  df-nf 1437  df-sb 1736  df-eu 2000  df-clab 2124  df-cleq 2130  df-clel 2133  df-nfc 2268  df-rex 2420  df-reu 2421  df-rab 2423  df-v 2683  df-sbc 2905  df-un 3070  df-in 3072  df-ss 3079  df-sn 3528  df-pr 3529  df-uni 3732  df-iota 5083  df-riota 5723
This theorem is referenced by:  riotaprop  5746  riotass2  5749  riotass  5750  acexmidlemcase  5762  supclti  6878  caucvgsrlemcl  7590  caucvgsrlemgt1  7596  axcaucvglemcl  7696  subval  7947  subcl  7954  divvalap  8427  divclap  8431  lbcl  8697  divfnzn  9406  flqcl  10039  flapcl  10041  cjval  10610  cjth  10611  cjf  10612  oddpwdclemodd  11839  oddpwdclemdc  11840  oddpwdc  11841  qnumdencl  11854  qnumdenbi  11859
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