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Theorem ssrab 4009
Description: Subclass of a restricted class abstraction. (Contributed by NM, 16-Aug-2006.)
Assertion
Ref Expression
ssrab (𝐵 ⊆ {𝑥𝐴𝜑} ↔ (𝐵𝐴 ∧ ∀𝑥𝐵 𝜑))
Distinct variable groups:   𝑥,𝐴   𝑥,𝐵
Allowed substitution hint:   𝜑(𝑥)

Proof of Theorem ssrab
StepHypRef Expression
1 df-rab 3393 . . 3 {𝑥𝐴𝜑} = {𝑥 ∣ (𝑥𝐴𝜑)}
21sseq2i 3951 . 2 (𝐵 ⊆ {𝑥𝐴𝜑} ↔ 𝐵 ⊆ {𝑥 ∣ (𝑥𝐴𝜑)})
3 ssab 4001 . 2 (𝐵 ⊆ {𝑥 ∣ (𝑥𝐴𝜑)} ↔ ∀𝑥(𝑥𝐵 → (𝑥𝐴𝜑)))
4 dfss3 3911 . . . 4 (𝐵𝐴 ↔ ∀𝑥𝐵 𝑥𝐴)
54anbi1i 630 . . 3 ((𝐵𝐴 ∧ ∀𝑥𝐵 𝜑) ↔ (∀𝑥𝐵 𝑥𝐴 ∧ ∀𝑥𝐵 𝜑))
6 r19.26 3100 . . 3 (∀𝑥𝐵 (𝑥𝐴𝜑) ↔ (∀𝑥𝐵 𝑥𝐴 ∧ ∀𝑥𝐵 𝜑))
7 df-ral 3055 . . 3 (∀𝑥𝐵 (𝑥𝐴𝜑) ↔ ∀𝑥(𝑥𝐵 → (𝑥𝐴𝜑)))
85, 6, 73bitr2ri 301 . 2 (∀𝑥(𝑥𝐵 → (𝑥𝐴𝜑)) ↔ (𝐵𝐴 ∧ ∀𝑥𝐵 𝜑))
92, 3, 83bitri 298 1 (𝐵 ⊆ {𝑥𝐴𝜑} ↔ (𝐵𝐴 ∧ ∀𝑥𝐵 𝜑))
Colors of variables: wff setvar class
Syntax hints:  wi 4  wb 207  wa 396  wal 1545  wcel 2119  {cab 2718  wral 3054  {crab 3392  wss 3890
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1802  ax-4 1816  ax-5 1917  ax-6 1974  ax-7 2015  ax-8 2121  ax-9 2129  ax-10 2152  ax-11 2168  ax-12 2189  ax-ext 2712
This theorem depends on definitions:  df-bi 208  df-an 397  df-or 854  df-tru 1550  df-ex 1787  df-nf 1791  df-sb 2074  df-clab 2719  df-cleq 2732  df-clel 2815  df-nfc 2889  df-ral 3055  df-rab 3393  df-ss 3907
This theorem is referenced by:  ssrabdv  4011  omssnlim  7828  ordtypelem2  9431  ordtypelem10  9439  card2inf  9467  r0weon  9932  ramtlecl  16969  sscntz  19299  ppttop  22997  epttop  22999  cmpcov2  23380  tgcmp  23391  xkoinjcn  23677  fbssfi  23827  filssufilg  23901  uffixfr  23913  tmdgsum2  24086  symgtgp  24096  ghmcnp  24105  blcls  24496  clsocv  25242  lhop1lem  26005  ressatans  26923  axcontlem3  29060  axcontlem4  29061  ldgenpisyslem3  34356  ldgenpisys  34357  imambfm  34453  fineqvnttrclse  35312  lfuhgr  35353  connpconn  35470  cvmlift2lem11  35548  cvmlift2lem12  35549  bj-rabtr  37290  hbtlem6  43581  usgrexmpl1lem  48519  usgrexmpl2lem  48524
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