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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 = {𝑥 ∈ 𝐴 ∣ 𝜑}
Assertion
Ref Expression
ssrab3 𝐵 ⊆ 𝐴
Distinct variable group:   𝑥,𝐴
Allowed substitution hints:   𝜑(𝑥)   𝐵(𝑥)

Proof of Theorem ssrab3
StepHypRef Expression
1 ssrab3.1 . 2 𝐵 = {𝑥 ∈ 𝐴 ∣ 𝜑}
2 ssrab2 3333 . 2 {𝑥 ∈ 𝐴 ∣ 𝜑} ⊆ 𝐴
31, 2eqsstri 3280 1 𝐵 ⊆ 𝐴
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  13098  pcprendvds  13099  4sqlem13m  13212  4sqlem14  13213  4sqlem17  13216  ballotfilemfmpn  13293  ballotfilemafi  13297  ballotfilembfi  13298  ballotfilemth  13340  nmzsubg  14073  nmznsg  14076  conjnmz  14142  conjnmzb  14143  nzrring  14600  lringnzr  14610  rrgeq0  14683  rrgss  14685  psrbagconf1o  15179  psrass1filem  15182  mpodvdsmulf1o  16296  fsumdvdsmul  16297  lgsfcl2  16342
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