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Theorem ssrab3 3334
Description: Subclass relation for a restricted class abstraction. (Contributed by Jonathan Ben-Naim, 3-Jun-2011.)
Hypothesis
Ref Expression
ssrab3.1 𝐵 = {𝑥𝐴𝜑}
Assertion
Ref Expression
ssrab3 𝐵𝐴
Distinct variable group:   𝑥,𝐴
Allowed substitution hints:   𝜑(𝑥)   𝐵(𝑥)

Proof of Theorem ssrab3
StepHypRef Expression
1 ssrab3.1 . 2 𝐵 = {𝑥𝐴𝜑}
2 ssrab2 3333 . 2 {𝑥𝐴𝜑} ⊆ 𝐴
31, 2eqsstri 3280 1 𝐵𝐴
Colors of variables:    wff set class
This proof depends on syntax axioms:   = wceq 1402  {crab 2532  wss 3220
This proof depends on 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 proof depends on definitions:  df-bi 117  df-nf 1514  df-sb 1816  df-clab 2225  df-cleq 2231  df-clel 2234  df-nfc 2381  df-rab 2537  df-in 3226  df-ss 3233
This theorem is used by:  if0ss  3642  pcprecl  13070  pcprendvds  13071  4sqlem13m  13184  4sqlem14  13185  4sqlem17  13188  ballotfilemfmpn  13236  ballotfilemafi  13240  ballotfilembfi  13241  ballotfilemth  13283  nmzsubg  14015  nmznsg  14018  conjnmz  14084  conjnmzb  14085  nzrring  14492  lringnzr  14502  rrgeq0  14575  rrgss  14577  psrbagconf1o  15066  mpodvdsmulf1o  16110  fsumdvdsmul  16111  lgsfcl2  16137
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