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Theorem rabssd 46430
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 3264 . 2 (𝜑 → ∀𝑥 ∈ 𝐴 (𝜒 → 𝑥 ∈ 𝐵))
5 rabssd.2 . . 3 Ⅎ𝑥𝐵
65rabssf 46407 . 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 2147  Ⅎwnfc 2911  ∀wral 3080  {crab 3416   ⊆ wss 3900
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 1945  ax-6 2002  ax-7 2043  ax-8 2149  ax-9 2157  ax-10 2180  ax-11 2197  ax-12 2216  ax-ext 2735
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 2102  df-clab 2742  df-cleq 2755  df-clel 2839  df-nfc 2913  df-ral 3081  df-rab 3417  df-ss 3901
This theorem is used by:  pimxrneun  46771  fsupdm  48125  finfdm  48129
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