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Theorem rabssd 46126
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
StepHypRef Expression
1 rabssd.1 . . 3 Ⅎ𝑥𝜑
2 rabssd.3 . . . 4 ((𝜑 ∧ 𝑥 ∈ 𝐴 ∧ 𝜒) → 𝑥 ∈ 𝐵)
323exp 1137 . . 3 (𝜑 → (𝑥 ∈ 𝐴 → (𝜒 → 𝑥 ∈ 𝐵)))
41, 3ralrimi 3261 . 2 (𝜑 → ∀𝑥 ∈ 𝐴 (𝜒 → 𝑥 ∈ 𝐵))
5 rabssd.2 . . 3 Ⅎ𝑥𝐵
65rabssf 46103 . 2 ({𝑥 ∈ 𝐴 ∣ 𝜒} ⊆ 𝐵 ↔ ∀𝑥 ∈ 𝐴 (𝜒 → 𝑥 ∈ 𝐵))
74, 6sylibr 237 1 (𝜑 → {𝑥 ∈ 𝐴 ∣ 𝜒} ⊆ 𝐵)
Colors of variables:    wff setvar class
This proof depends on syntax axioms:   → wi 4   ∧ w3a 1103  Ⅎwnf 1816   ∈ wcel 2145  Ⅎwnfc 2908  ∀wral 3077  {crab 3413   ⊆ wss 3899
This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1828  ax-4 1842  ax-5 1943  ax-6 2000  ax-7 2041  ax-8 2147  ax-9 2155  ax-10 2178  ax-11 2194  ax-12 2213  ax-ext 2733
This proof depends on definitions:  df-bi 210  df-an 402  df-or 862  df-3an 1105  df-tru 1573  df-ex 1813  df-nf 1817  df-sb 2100  df-clab 2740  df-cleq 2753  df-clel 2836  df-nfc 2910  df-ral 3078  df-rab 3414  df-ss 3916
This theorem is used by:  pimxrneun  46467  fsupdm  47821  finfdm  47825
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