Users' Mathboxes Mathbox for Glauco Siliprandi < Previous   Next >
Nearby theorems
Mirrors  >  Home  >  MPE Home  >  Th. List  >   Mathboxes  >  rabssf Structured version   Visualization version   GIF version

Theorem rabssf 42557
Description: Restricted class abstraction in a subclass relationship. (Contributed by Glauco Siliprandi, 26-Jun-2021.)
Hypothesis
Ref Expression
rabssf.1 𝑥𝐵
Assertion
Ref Expression
rabssf ({𝑥𝐴𝜑} ⊆ 𝐵 ↔ ∀𝑥𝐴 (𝜑𝑥𝐵))

Proof of Theorem rabssf
StepHypRef Expression
1 df-rab 3072 . . 3 {𝑥𝐴𝜑} = {𝑥 ∣ (𝑥𝐴𝜑)}
21sseq1i 3945 . 2 ({𝑥𝐴𝜑} ⊆ 𝐵 ↔ {𝑥 ∣ (𝑥𝐴𝜑)} ⊆ 𝐵)
3 rabssf.1 . . 3 𝑥𝐵
43abssf 42551 . 2 ({𝑥 ∣ (𝑥𝐴𝜑)} ⊆ 𝐵 ↔ ∀𝑥((𝑥𝐴𝜑) → 𝑥𝐵))
5 impexp 450 . . . 4 (((𝑥𝐴𝜑) → 𝑥𝐵) ↔ (𝑥𝐴 → (𝜑𝑥𝐵)))
65albii 1823 . . 3 (∀𝑥((𝑥𝐴𝜑) → 𝑥𝐵) ↔ ∀𝑥(𝑥𝐴 → (𝜑𝑥𝐵)))
7 df-ral 3068 . . 3 (∀𝑥𝐴 (𝜑𝑥𝐵) ↔ ∀𝑥(𝑥𝐴 → (𝜑𝑥𝐵)))
86, 7bitr4i 277 . 2 (∀𝑥((𝑥𝐴𝜑) → 𝑥𝐵) ↔ ∀𝑥𝐴 (𝜑𝑥𝐵))
92, 4, 83bitri 296 1 ({𝑥𝐴𝜑} ⊆ 𝐵 ↔ ∀𝑥𝐴 (𝜑𝑥𝐵))
Colors of variables: wff setvar class
Syntax hints:  wi 4  wb 205  wa 395  wal 1537  wcel 2108  {cab 2715  wnfc 2886  wral 3063  {crab 3067  wss 3883
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1799  ax-4 1813  ax-5 1914  ax-6 1972  ax-7 2012  ax-8 2110  ax-9 2118  ax-10 2139  ax-11 2156  ax-12 2173  ax-ext 2709
This theorem depends on definitions:  df-bi 206  df-an 396  df-or 844  df-tru 1542  df-ex 1784  df-nf 1788  df-sb 2069  df-clab 2716  df-cleq 2730  df-clel 2817  df-nfc 2888  df-ral 3068  df-rab 3072  df-v 3424  df-in 3890  df-ss 3900
This theorem is referenced by:  rabssd  42580  supminfxr2  42899  preimageiingt  44144  preimaleiinlt  44145  smfmullem4  44215
  Copyright terms: Public domain W3C validator