Theorem rabssd 45745

Description: Restricted class abstraction in a subclass relationship. (Contributed by Glauco Siliprandi, 2-Jan-2022.)

Hypotheses

Ref	Expression
rabssd.1	⊢ Ⅎ𝑥𝜑
rabssd.2	⊢ Ⅎ𝑥𝐵
rabssd.3	⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴 ∧ 𝜒) → 𝑥 ∈ 𝐵)

Assertion

Ref	Expression
rabssd	⊢ (𝜑 → {𝑥 ∈ 𝐴 ∣ 𝜒} ⊆ 𝐵)

Proof of Theorem rabssd

Step	Hyp	Ref	Expression
1		rabssd.1	. . 3 ⊢ Ⅎ𝑥𝜑
2		rabssd.3	. . . 4 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴 ∧ 𝜒) → 𝑥 ∈ 𝐵)
3	2	3exp 1135	. . 3 ⊢ (𝜑 → (𝑥 ∈ 𝐴 → (𝜒 → 𝑥 ∈ 𝐵)))
4	1, 3	ralrimi 3269	. 2 ⊢ (𝜑 → ∀𝑥 ∈ 𝐴 (𝜒 → 𝑥 ∈ 𝐵))
5		rabssd.2	. . 3 ⊢ Ⅎ𝑥𝐵
6	5	rabssf 45722	. 2 ⊢ ({𝑥 ∈ 𝐴 ∣ 𝜒} ⊆ 𝐵 ↔ ∀𝑥 ∈ 𝐴 (𝜒 → 𝑥 ∈ 𝐵))
7	4, 6	sylibr 237	1 ⊢ (𝜑 → {𝑥 ∈ 𝐴 ∣ 𝜒} ⊆ 𝐵)

Syntax hints:   → wi 4   ∧ w3a 1101  Ⅎwnf 1810   ∈ wcel 2149  Ⅎwnfc 2916  ∀wral 3085  {crab 3423   ⊆ wss 3913

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1822  ax-4 1836  ax-5 1937  ax-6 1994  ax-7 2035  ax-8 2151  ax-9 2159  ax-10 2182  ax-11 2198  ax-12 2219  ax-ext 2741

This theorem depends on definitions:  df-bi 210  df-an 401  df-or 861  df-3an 1103  df-tru 1570  df-ex 1807  df-nf 1811  df-sb 2098  df-clab 2748  df-cleq 2761  df-clel 2844  df-nfc 2918  df-ral 3086  df-rab 3424  df-ss 3930

This theorem is referenced by:  pimxrneun  46087  fsupdm  47441  finfdm  47445