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Theorem rabss 3642
Description: Restricted class abstraction in a subclass relationship. (Contributed by NM, 16-Aug-2006.)
Assertion
Ref Expression
rabss ({𝑥𝐴𝜑} ⊆ 𝐵 ↔ ∀𝑥𝐴 (𝜑𝑥𝐵))
Distinct variable group:   𝑥,𝐵
Allowed substitution hints:   𝜑(𝑥)   𝐴(𝑥)

Proof of Theorem rabss
StepHypRef Expression
1 df-rab 2905 . . 3 {𝑥𝐴𝜑} = {𝑥 ∣ (𝑥𝐴𝜑)}
21sseq1i 3592 . 2 ({𝑥𝐴𝜑} ⊆ 𝐵 ↔ {𝑥 ∣ (𝑥𝐴𝜑)} ⊆ 𝐵)
3 abss 3634 . 2 ({𝑥 ∣ (𝑥𝐴𝜑)} ⊆ 𝐵 ↔ ∀𝑥((𝑥𝐴𝜑) → 𝑥𝐵))
4 impexp 461 . . . 4 (((𝑥𝐴𝜑) → 𝑥𝐵) ↔ (𝑥𝐴 → (𝜑𝑥𝐵)))
54albii 1737 . . 3 (∀𝑥((𝑥𝐴𝜑) → 𝑥𝐵) ↔ ∀𝑥(𝑥𝐴 → (𝜑𝑥𝐵)))
6 df-ral 2901 . . 3 (∀𝑥𝐴 (𝜑𝑥𝐵) ↔ ∀𝑥(𝑥𝐴 → (𝜑𝑥𝐵)))
75, 6bitr4i 266 . 2 (∀𝑥((𝑥𝐴𝜑) → 𝑥𝐵) ↔ ∀𝑥𝐴 (𝜑𝑥𝐵))
82, 3, 73bitri 285 1 ({𝑥𝐴𝜑} ⊆ 𝐵 ↔ ∀𝑥𝐴 (𝜑𝑥𝐵))
Colors of variables: wff setvar class
Syntax hints:  wi 4  wb 195  wa 383  wal 1473  wcel 1977  {cab 2596  wral 2896  {crab 2900  wss 3540
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1713  ax-4 1728  ax-5 1827  ax-6 1875  ax-7 1922  ax-10 2006  ax-11 2021  ax-12 2034  ax-13 2234  ax-ext 2590
This theorem depends on definitions:  df-bi 196  df-or 384  df-an 385  df-tru 1478  df-ex 1696  df-nf 1701  df-sb 1868  df-clab 2597  df-cleq 2603  df-clel 2606  df-nfc 2740  df-ral 2901  df-rab 2905  df-in 3547  df-ss 3554
This theorem is referenced by:  rabssdv  3645  fnsuppres  7187  wemapso2lem  8318  tskwe2  9452  grothac  9509  uzwo3  11618  fsuppmapnn0fiub0  12613  dvdsssfz1  14827  phibndlem  15262  dfphi2  15266  ramval  15499  mgmidsssn0  17041  istopon  20488  ordtrest2lem  20765  filssufilg  21473  cfinufil  21490  blsscls2  22067  nmhmcn  22676  ovolshftlem2  23030  atansssdm  24405  sspval  26756  ubthlem2  26905  ordtrest2NEWlem  29090  truae  29427  poimirlem30  32403  nnubfi  32510  prnc  32830  itgperiod  38667  fourierdlem81  38874  ovnsupge0  39241  smflimlem2  39452  umgrres1lem  40521  upgrres1  40524
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