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Theorem ssralv2VD 38624
Description: Quantification restricted to a subclass for two quantifiers. ssralv 3651 for two quantifiers. The following User's Proof is a Virtual Deduction proof completed automatically by the tools program completeusersproof.cmd, which invokes Mel L. O'Cat's mmj2 and Norm Megill's Metamath Proof Assistant. ssralv2 38258 is ssralv2VD 38624 without virtual deductions and was automatically derived from ssralv2VD 38624.
1:: (   (𝐴𝐵𝐶𝐷)   ▶   (𝐴𝐵 𝐶𝐷)   )
2:: (   (𝐴𝐵𝐶𝐷)   ,   𝑥𝐵 𝑦𝐷𝜑   ▶   𝑥𝐵𝑦𝐷𝜑   )
3:1: (   (𝐴𝐵𝐶𝐷)   ▶   𝐴𝐵   )
4:3,2: (   (𝐴𝐵𝐶𝐷)   ,   𝑥𝐵 𝑦𝐷𝜑   ▶   𝑥𝐴𝑦𝐷𝜑   )
5:4: (   (𝐴𝐵𝐶𝐷)   ,   𝑥𝐵 𝑦𝐷𝜑   ▶   𝑥(𝑥𝐴 → ∀𝑦𝐷𝜑)   )
6:5: (   (𝐴𝐵𝐶𝐷)   ,   𝑥𝐵 𝑦𝐷𝜑   ▶   (𝑥𝐴 → ∀𝑦𝐷𝜑)   )
7:: (   (𝐴𝐵𝐶𝐷)   ,   𝑥𝐵 𝑦𝐷𝜑, 𝑥𝐴   ▶   𝑥𝐴   )
8:7,6: (   (𝐴𝐵𝐶𝐷)   ,   𝑥𝐵 𝑦𝐷𝜑, 𝑥𝐴   ▶   𝑦𝐷𝜑   )
9:1: (   (𝐴𝐵𝐶𝐷)   ▶   𝐶𝐷   )
10:9,8: (   (𝐴𝐵𝐶𝐷)   ,   𝑥𝐵 𝑦𝐷𝜑, 𝑥𝐴   ▶   𝑦𝐶𝜑   )
11:10: (   (𝐴𝐵𝐶𝐷)   ,   𝑥𝐵 𝑦𝐷𝜑   ▶   (𝑥𝐴 → ∀𝑦𝐶𝜑)   )
12:: ((𝐴𝐵𝐶𝐷) → ∀𝑥(𝐴𝐵𝐶𝐷))
13:: (∀𝑥𝐵𝑦𝐷𝜑 → ∀𝑥𝑥𝐵𝑦𝐷𝜑)
14:12,13,11: (   (𝐴𝐵𝐶𝐷)   ,   𝑥𝐵 𝑦𝐷𝜑   ▶   𝑥(𝑥𝐴 → ∀𝑦𝐶𝜑)   )
15:14: (   (𝐴𝐵𝐶𝐷)   ,   𝑥𝐵 𝑦𝐷𝜑   ▶   𝑥𝐴𝑦𝐶𝜑   )
16:15: (   (𝐴𝐵𝐶𝐷)    ▶   (∀𝑥𝐵𝑦𝐷𝜑 → ∀𝑥𝐴𝑦𝐶𝜑)   )
qed:16: ((𝐴𝐵𝐶𝐷) → (∀𝑥𝐵𝑦𝐷𝜑 → ∀𝑥𝐴𝑦𝐶𝜑))
(Contributed by Alan Sare, 10-Feb-2012.) (Proof modification is discouraged.) (New usage is discouraged.)
Assertion
Ref Expression
ssralv2VD ((𝐴𝐵𝐶𝐷) → (∀𝑥𝐵𝑦𝐷 𝜑 → ∀𝑥𝐴𝑦𝐶 𝜑))
Distinct variable groups:   𝑥,𝐴   𝑥,𝐵   𝑥,𝐶   𝑦,𝐶   𝑥,𝐷   𝑦,𝐷
Allowed substitution hints:   𝜑(𝑥,𝑦)   𝐴(𝑦)   𝐵(𝑦)

Proof of Theorem ssralv2VD
StepHypRef Expression
1 ax-5 1836 . . . . 5 ((𝐴𝐵𝐶𝐷) → ∀𝑥(𝐴𝐵𝐶𝐷))
2 hbra1 2938 . . . . 5 (∀𝑥𝐵𝑦𝐷 𝜑 → ∀𝑥𝑥𝐵𝑦𝐷 𝜑)
3 idn1 38311 . . . . . . . 8 (   (𝐴𝐵𝐶𝐷)   ▶   (𝐴𝐵𝐶𝐷)   )
4 simpr 477 . . . . . . . 8 ((𝐴𝐵𝐶𝐷) → 𝐶𝐷)
53, 4e1a 38373 . . . . . . 7 (   (𝐴𝐵𝐶𝐷)   ▶   𝐶𝐷   )
6 idn3 38361 . . . . . . . 8 (   (𝐴𝐵𝐶𝐷)   ,   𝑥𝐵𝑦𝐷 𝜑   ,   𝑥𝐴   ▶   𝑥𝐴   )
7 simpl 473 . . . . . . . . . . . 12 ((𝐴𝐵𝐶𝐷) → 𝐴𝐵)
83, 7e1a 38373 . . . . . . . . . . 11 (   (𝐴𝐵𝐶𝐷)   ▶   𝐴𝐵   )
9 idn2 38359 . . . . . . . . . . 11 (   (𝐴𝐵𝐶𝐷)   ,   𝑥𝐵𝑦𝐷 𝜑   ▶   𝑥𝐵𝑦𝐷 𝜑   )
10 ssralv 3651 . . . . . . . . . . 11 (𝐴𝐵 → (∀𝑥𝐵𝑦𝐷 𝜑 → ∀𝑥𝐴𝑦𝐷 𝜑))
118, 9, 10e12 38472 . . . . . . . . . 10 (   (𝐴𝐵𝐶𝐷)   ,   𝑥𝐵𝑦𝐷 𝜑   ▶   𝑥𝐴𝑦𝐷 𝜑   )
12 df-ral 2913 . . . . . . . . . . 11 (∀𝑥𝐴𝑦𝐷 𝜑 ↔ ∀𝑥(𝑥𝐴 → ∀𝑦𝐷 𝜑))
1312biimpi 206 . . . . . . . . . 10 (∀𝑥𝐴𝑦𝐷 𝜑 → ∀𝑥(𝑥𝐴 → ∀𝑦𝐷 𝜑))
1411, 13e2 38377 . . . . . . . . 9 (   (𝐴𝐵𝐶𝐷)   ,   𝑥𝐵𝑦𝐷 𝜑   ▶   𝑥(𝑥𝐴 → ∀𝑦𝐷 𝜑)   )
15 sp 2051 . . . . . . . . 9 (∀𝑥(𝑥𝐴 → ∀𝑦𝐷 𝜑) → (𝑥𝐴 → ∀𝑦𝐷 𝜑))
1614, 15e2 38377 . . . . . . . 8 (   (𝐴𝐵𝐶𝐷)   ,   𝑥𝐵𝑦𝐷 𝜑   ▶   (𝑥𝐴 → ∀𝑦𝐷 𝜑)   )
17 pm2.27 42 . . . . . . . 8 (𝑥𝐴 → ((𝑥𝐴 → ∀𝑦𝐷 𝜑) → ∀𝑦𝐷 𝜑))
186, 16, 17e32 38506 . . . . . . 7 (   (𝐴𝐵𝐶𝐷)   ,   𝑥𝐵𝑦𝐷 𝜑   ,   𝑥𝐴   ▶   𝑦𝐷 𝜑   )
19 ssralv 3651 . . . . . . 7 (𝐶𝐷 → (∀𝑦𝐷 𝜑 → ∀𝑦𝐶 𝜑))
205, 18, 19e13 38496 . . . . . 6 (   (𝐴𝐵𝐶𝐷)   ,   𝑥𝐵𝑦𝐷 𝜑   ,   𝑥𝐴   ▶   𝑦𝐶 𝜑   )
2120in3 38355 . . . . 5 (   (𝐴𝐵𝐶𝐷)   ,   𝑥𝐵𝑦𝐷 𝜑   ▶   (𝑥𝐴 → ∀𝑦𝐶 𝜑)   )
221, 2, 21gen21nv 38366 . . . 4 (   (𝐴𝐵𝐶𝐷)   ,   𝑥𝐵𝑦𝐷 𝜑   ▶   𝑥(𝑥𝐴 → ∀𝑦𝐶 𝜑)   )
23 df-ral 2913 . . . . 5 (∀𝑥𝐴𝑦𝐶 𝜑 ↔ ∀𝑥(𝑥𝐴 → ∀𝑦𝐶 𝜑))
2423biimpri 218 . . . 4 (∀𝑥(𝑥𝐴 → ∀𝑦𝐶 𝜑) → ∀𝑥𝐴𝑦𝐶 𝜑)
2522, 24e2 38377 . . 3 (   (𝐴𝐵𝐶𝐷)   ,   𝑥𝐵𝑦𝐷 𝜑   ▶   𝑥𝐴𝑦𝐶 𝜑   )
2625in2 38351 . 2 (   (𝐴𝐵𝐶𝐷)   ▶   (∀𝑥𝐵𝑦𝐷 𝜑 → ∀𝑥𝐴𝑦𝐶 𝜑)   )
2726in1 38308 1 ((𝐴𝐵𝐶𝐷) → (∀𝑥𝐵𝑦𝐷 𝜑 → ∀𝑥𝐴𝑦𝐶 𝜑))
Colors of variables: wff setvar class
Syntax hints:  wi 4  wa 384  wal 1478  wcel 1987  wral 2908  wss 3560
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1719  ax-4 1734  ax-5 1836  ax-6 1885  ax-7 1932  ax-9 1996  ax-10 2016  ax-11 2031  ax-12 2044  ax-13 2245  ax-ext 2601
This theorem depends on definitions:  df-bi 197  df-or 385  df-an 386  df-3an 1038  df-tru 1483  df-ex 1702  df-nf 1707  df-sb 1878  df-clab 2608  df-cleq 2614  df-clel 2617  df-ral 2913  df-in 3567  df-ss 3574  df-vd1 38307  df-vd2 38315  df-vd3 38327
This theorem is referenced by: (None)
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