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Theorem rabssd 45596
Description: Restricted class abstraction in a subclass relationship. (Contributed by Glauco Siliprandi, 2-Jan-2022.)
Hypotheses
Ref Expression
rabssd.1 𝑥𝜑
rabssd.2 𝑥𝐵
rabssd.3 ((𝜑𝑥𝐴𝜒) → 𝑥𝐵)
Assertion
Ref Expression
rabssd (𝜑 → {𝑥𝐴𝜒} ⊆ 𝐵)

Proof of Theorem rabssd
StepHypRef Expression
1 rabssd.1 . . 3 𝑥𝜑
2 rabssd.3 . . . 4 ((𝜑𝑥𝐴𝜒) → 𝑥𝐵)
323exp 1125 . . 3 (𝜑 → (𝑥𝐴 → (𝜒𝑥𝐵)))
41, 3ralrimi 3238 . 2 (𝜑 → ∀𝑥𝐴 (𝜒𝑥𝐵))
5 rabssd.2 . . 3 𝑥𝐵
65rabssf 45573 . 2 ({𝑥𝐴𝜒} ⊆ 𝐵 ↔ ∀𝑥𝐴 (𝜒𝑥𝐵))
74, 6sylibr 235 1 (𝜑 → {𝑥𝐴𝜒} ⊆ 𝐵)
Colors of variables: wff setvar class
Syntax hints:  wi 4  w3a 1092  wnf 1790  wcel 2119  wnfc 2887  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-3an 1094  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:  pimxrneun  45938  fsupdm  47292  finfdm  47296
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