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Theorem rspc2dv 3637
Description: 2-variable restricted specialization, using implicit substitution. (Contributed by Scott Fenton, 6-Mar-2025.)
Hypotheses
Ref Expression
rspc2dv.1 (𝑥 = 𝐴 → (𝜓𝜃))
rspc2dv.2 (𝑦 = 𝐵 → (𝜃𝜒))
rspc2dv.3 (𝜑 → ∀𝑥𝐶𝑦𝐷 𝜓)
rspc2dv.4 (𝜑𝐴𝐶)
rspc2dv.5 (𝜑𝐵𝐷)
Assertion
Ref Expression
rspc2dv (𝜑𝜒)
Distinct variable groups:   𝑥,𝑦,𝐴   𝑦,𝐵   𝑥,𝐶   𝑥,𝐷,𝑦   𝜒,𝑦   𝜃,𝑥
Allowed substitution hints:   𝜑(𝑥,𝑦)   𝜓(𝑥,𝑦)   𝜒(𝑥)   𝜃(𝑦)   𝐵(𝑥)   𝐶(𝑦)

Proof of Theorem rspc2dv
StepHypRef Expression
1 rspc2dv.4 . 2 (𝜑𝐴𝐶)
2 rspc2dv.5 . 2 (𝜑𝐵𝐷)
3 rspc2dv.3 . 2 (𝜑 → ∀𝑥𝐶𝑦𝐷 𝜓)
4 rspc2dv.1 . . 3 (𝑥 = 𝐴 → (𝜓𝜃))
5 rspc2dv.2 . . 3 (𝑦 = 𝐵 → (𝜃𝜒))
64, 5rspc2va 3634 . 2 (((𝐴𝐶𝐵𝐷) ∧ ∀𝑥𝐶𝑦𝐷 𝜓) → 𝜒)
71, 2, 3, 6syl21anc 838 1 (𝜑𝜒)
Colors of variables: wff setvar class
Syntax hints:  wi 4  wb 206   = wceq 1537  wcel 2106  wral 3059
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1792  ax-4 1806  ax-5 1908  ax-6 1965  ax-7 2005  ax-8 2108  ax-9 2116  ax-ext 2706
This theorem depends on definitions:  df-bi 207  df-an 396  df-tru 1540  df-ex 1777  df-sb 2063  df-clab 2713  df-cleq 2727  df-clel 2814  df-ral 3060
This theorem is referenced by:  mulscom  28180  addsdilem3  28194  addsdilem4  28195  mulsasslem3  28206  rprmdvds  33527  cvxsconn  35228
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