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Theorem rabssrabd 3315
Description: Subclass of a restricted class abstraction. (Contributed by AV, 4-Jun-2022.)
Hypotheses
Ref Expression
rabssrabd.1 (𝜑𝐴𝐵)
rabssrabd.2 ((𝜑𝜓𝑥𝐴) → 𝜒)
Assertion
Ref Expression
rabssrabd (𝜑 → {𝑥𝐴𝜓} ⊆ {𝑥𝐵𝜒})
Distinct variable groups:   𝑥,𝐴   𝑥,𝐵   𝜑,𝑥
Allowed substitution hints:   𝜓(𝑥)   𝜒(𝑥)

Proof of Theorem rabssrabd
StepHypRef Expression
1 3anan32 1016 . . . . 5 ((𝜑𝜓𝑥𝐴) ↔ ((𝜑𝑥𝐴) ∧ 𝜓))
2 rabssrabd.2 . . . . 5 ((𝜑𝜓𝑥𝐴) → 𝜒)
31, 2sylbir 135 . . . 4 (((𝜑𝑥𝐴) ∧ 𝜓) → 𝜒)
43ex 115 . . 3 ((𝜑𝑥𝐴) → (𝜓𝜒))
54ss2rabdv 3309 . 2 (𝜑 → {𝑥𝐴𝜓} ⊆ {𝑥𝐴𝜒})
6 rabssrabd.1 . . 3 (𝜑𝐴𝐵)
7 rabss2 3311 . . 3 (𝐴𝐵 → {𝑥𝐴𝜒} ⊆ {𝑥𝐵𝜒})
86, 7syl 14 . 2 (𝜑 → {𝑥𝐴𝜒} ⊆ {𝑥𝐵𝜒})
95, 8sstrd 3238 1 (𝜑 → {𝑥𝐴𝜓} ⊆ {𝑥𝐵𝜒})
Colors of variables: wff set class
Syntax hints:  wi 4  wa 104  w3a 1005  wcel 2202  {crab 2515  wss 3201
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-io 717  ax-5 1496  ax-7 1497  ax-gen 1498  ax-ie1 1542  ax-ie2 1543  ax-8 1553  ax-10 1554  ax-11 1555  ax-i12 1556  ax-bndl 1558  ax-4 1559  ax-17 1575  ax-i9 1579  ax-ial 1583  ax-i5r 1584  ax-ext 2213
This theorem depends on definitions:  df-bi 117  df-3an 1007  df-nf 1510  df-sb 1811  df-clab 2218  df-cleq 2224  df-clel 2227  df-nfc 2364  df-ral 2516  df-rab 2520  df-in 3207  df-ss 3214
This theorem is referenced by:  suppfnss  6435
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