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Theorem hbexgVD 39654
Description: Virtual deduction proof of hbexg 39288. 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. hbexg 39288 is hbexgVD 39654 without virtual deductions and was automatically derived from hbexgVD 39654. (Contributed by Alan Sare, 8-Feb-2014.) (Proof modification is discouraged.) (New usage is discouraged.)
1:: (   𝑥𝑦(𝜑 → ∀𝑥𝜑)   ▶   𝑥 𝑦(𝜑 → ∀𝑥𝜑)   )
2:1: (   𝑥𝑦(𝜑 → ∀𝑥𝜑)   ▶   𝑦 𝑥(𝜑 → ∀𝑥𝜑)   )
3:2: (   𝑥𝑦(𝜑 → ∀𝑥𝜑)   ▶   𝑥 (𝜑 → ∀𝑥𝜑)   )
4:3: (   𝑥𝑦(𝜑 → ∀𝑥𝜑)   ▶   𝑥 𝜑 → ∀𝑥¬ 𝜑)   )
5:: (∀𝑥𝑦(𝜑 → ∀𝑥𝜑) ↔ ∀𝑦 𝑥(𝜑 → ∀𝑥𝜑))
6:: (∀𝑦𝑥(𝜑 → ∀𝑥𝜑) → ∀𝑦 𝑦𝑥(𝜑 → ∀𝑥𝜑))
7:5: (∀𝑦𝑥𝑦(𝜑 → ∀𝑥𝜑) ↔ 𝑦𝑦𝑥(𝜑 → ∀𝑥𝜑))
8:5,6,7: (∀𝑥𝑦(𝜑 → ∀𝑥𝜑) → ∀𝑦 𝑥𝑦(𝜑 → ∀𝑥𝜑))
9:8,4: (   𝑥𝑦(𝜑 → ∀𝑥𝜑)   ▶   𝑦 𝑥𝜑 → ∀𝑥¬ 𝜑)   )
10:9: (   𝑥𝑦(𝜑 → ∀𝑥𝜑)   ▶   𝑥 𝑦𝜑 → ∀𝑥¬ 𝜑)   )
11:10: (   𝑥𝑦(𝜑 → ∀𝑥𝜑)   ▶   𝑦 𝜑 → ∀𝑥¬ 𝜑)   )
12:11: (   𝑥𝑦(𝜑 → ∀𝑥𝜑)   ▶   𝑦 (∀𝑦¬ 𝜑 → ∀𝑥𝑦¬ 𝜑)   )
13:12: (   𝑥𝑦(𝜑 → ∀𝑥𝜑)   ▶   (∀ 𝑦¬ 𝜑 → ∀𝑥𝑦¬ 𝜑)   )
14:: (∀𝑥𝑦(𝜑 → ∀𝑥𝜑) → ∀𝑥 𝑥𝑦(𝜑 → ∀𝑥𝜑))
15:13,14: (   𝑥𝑦(𝜑 → ∀𝑥𝜑)   ▶   𝑥 (∀𝑦¬ 𝜑 → ∀𝑥𝑦¬ 𝜑)   )
16:15: (   𝑥𝑦(𝜑 → ∀𝑥𝜑)   ▶   𝑥 (¬ ∀𝑦¬ 𝜑 → ∀𝑥¬ ∀𝑦¬ 𝜑)   )
17:16: (   𝑥𝑦(𝜑 → ∀𝑥𝜑)   ▶    𝑦¬ 𝜑 → ∀𝑥¬ ∀𝑦¬ 𝜑)   )
18:: (∃𝑦𝜑 ↔ ¬ ∀𝑦¬ 𝜑)
19:17,18: (   𝑥𝑦(𝜑 → ∀𝑥𝜑)   ▶   (∃ 𝑦𝜑 → ∀𝑥¬ ∀𝑦¬ 𝜑)   )
20:18: (∀𝑥𝑦𝜑 ↔ ∀𝑥¬ ∀𝑦¬ 𝜑)
21:19,20: (   𝑥𝑦(𝜑 → ∀𝑥𝜑)   ▶   (∃ 𝑦𝜑 → ∀𝑥𝑦𝜑)   )
22:8,21: (   𝑥𝑦(𝜑 → ∀𝑥𝜑)   ▶   𝑦 (∃𝑦𝜑 → ∀𝑥𝑦𝜑)   )
23:14,22: (   𝑥𝑦(𝜑 → ∀𝑥𝜑)   ▶   𝑥 𝑦(∃𝑦𝜑 → ∀𝑥𝑦𝜑)   )
qed:23: (   𝑥𝑦(𝜑 → ∀𝑥𝜑)   ▶   𝑥 𝑦(∃𝑦𝜑 → ∀𝑥𝑦𝜑)   )
Assertion
Ref Expression
hbexgVD (∀𝑥𝑦(𝜑 → ∀𝑥𝜑) → ∀𝑥𝑦(∃𝑦𝜑 → ∀𝑥𝑦𝜑))

Proof of Theorem hbexgVD
StepHypRef Expression
1 hba1 2329 . . 3 (∀𝑥𝑦(𝜑 → ∀𝑥𝜑) → ∀𝑥𝑥𝑦(𝜑 → ∀𝑥𝜑))
2 hba1 2329 . . . . 5 (∀𝑦𝑥(𝜑 → ∀𝑥𝜑) → ∀𝑦𝑦𝑥(𝜑 → ∀𝑥𝜑))
3 alcom 2205 . . . . 5 (∀𝑥𝑦(𝜑 → ∀𝑥𝜑) ↔ ∀𝑦𝑥(𝜑 → ∀𝑥𝜑))
43albii 1904 . . . . 5 (∀𝑦𝑥𝑦(𝜑 → ∀𝑥𝜑) ↔ ∀𝑦𝑦𝑥(𝜑 → ∀𝑥𝜑))
52, 3, 43imtr4i 283 . . . 4 (∀𝑥𝑦(𝜑 → ∀𝑥𝜑) → ∀𝑦𝑥𝑦(𝜑 → ∀𝑥𝜑))
6 idn1 39306 . . . . . . . . . . . . . . . . 17 (   𝑥𝑦(𝜑 → ∀𝑥𝜑)   ▶   𝑥𝑦(𝜑 → ∀𝑥𝜑)   )
7 ax-11 2202 . . . . . . . . . . . . . . . . 17 (∀𝑥𝑦(𝜑 → ∀𝑥𝜑) → ∀𝑦𝑥(𝜑 → ∀𝑥𝜑))
86, 7e1a 39368 . . . . . . . . . . . . . . . 16 (   𝑥𝑦(𝜑 → ∀𝑥𝜑)   ▶   𝑦𝑥(𝜑 → ∀𝑥𝜑)   )
9 sp 2219 . . . . . . . . . . . . . . . 16 (∀𝑦𝑥(𝜑 → ∀𝑥𝜑) → ∀𝑥(𝜑 → ∀𝑥𝜑))
108, 9e1a 39368 . . . . . . . . . . . . . . 15 (   𝑥𝑦(𝜑 → ∀𝑥𝜑)   ▶   𝑥(𝜑 → ∀𝑥𝜑)   )
11 hbntal 39285 . . . . . . . . . . . . . . 15 (∀𝑥(𝜑 → ∀𝑥𝜑) → ∀𝑥𝜑 → ∀𝑥 ¬ 𝜑))
1210, 11e1a 39368 . . . . . . . . . . . . . 14 (   𝑥𝑦(𝜑 → ∀𝑥𝜑)   ▶   𝑥𝜑 → ∀𝑥 ¬ 𝜑)   )
135, 12gen11nv 39358 . . . . . . . . . . . . 13 (   𝑥𝑦(𝜑 → ∀𝑥𝜑)   ▶   𝑦𝑥𝜑 → ∀𝑥 ¬ 𝜑)   )
14 ax-11 2202 . . . . . . . . . . . . 13 (∀𝑦𝑥𝜑 → ∀𝑥 ¬ 𝜑) → ∀𝑥𝑦𝜑 → ∀𝑥 ¬ 𝜑))
1513, 14e1a 39368 . . . . . . . . . . . 12 (   𝑥𝑦(𝜑 → ∀𝑥𝜑)   ▶   𝑥𝑦𝜑 → ∀𝑥 ¬ 𝜑)   )
16 sp 2219 . . . . . . . . . . . 12 (∀𝑥𝑦𝜑 → ∀𝑥 ¬ 𝜑) → ∀𝑦𝜑 → ∀𝑥 ¬ 𝜑))
1715, 16e1a 39368 . . . . . . . . . . 11 (   𝑥𝑦(𝜑 → ∀𝑥𝜑)   ▶   𝑦𝜑 → ∀𝑥 ¬ 𝜑)   )
18 hbalg 39287 . . . . . . . . . . 11 (∀𝑦𝜑 → ∀𝑥 ¬ 𝜑) → ∀𝑦(∀𝑦 ¬ 𝜑 → ∀𝑥𝑦 ¬ 𝜑))
1917, 18e1a 39368 . . . . . . . . . 10 (   𝑥𝑦(𝜑 → ∀𝑥𝜑)   ▶   𝑦(∀𝑦 ¬ 𝜑 → ∀𝑥𝑦 ¬ 𝜑)   )
20 sp 2219 . . . . . . . . . 10 (∀𝑦(∀𝑦 ¬ 𝜑 → ∀𝑥𝑦 ¬ 𝜑) → (∀𝑦 ¬ 𝜑 → ∀𝑥𝑦 ¬ 𝜑))
2119, 20e1a 39368 . . . . . . . . 9 (   𝑥𝑦(𝜑 → ∀𝑥𝜑)   ▶   (∀𝑦 ¬ 𝜑 → ∀𝑥𝑦 ¬ 𝜑)   )
221, 21gen11nv 39358 . . . . . . . 8 (   𝑥𝑦(𝜑 → ∀𝑥𝜑)   ▶   𝑥(∀𝑦 ¬ 𝜑 → ∀𝑥𝑦 ¬ 𝜑)   )
23 hbntal 39285 . . . . . . . 8 (∀𝑥(∀𝑦 ¬ 𝜑 → ∀𝑥𝑦 ¬ 𝜑) → ∀𝑥(¬ ∀𝑦 ¬ 𝜑 → ∀𝑥 ¬ ∀𝑦 ¬ 𝜑))
2422, 23e1a 39368 . . . . . . 7 (   𝑥𝑦(𝜑 → ∀𝑥𝜑)   ▶   𝑥(¬ ∀𝑦 ¬ 𝜑 → ∀𝑥 ¬ ∀𝑦 ¬ 𝜑)   )
25 sp 2219 . . . . . . 7 (∀𝑥(¬ ∀𝑦 ¬ 𝜑 → ∀𝑥 ¬ ∀𝑦 ¬ 𝜑) → (¬ ∀𝑦 ¬ 𝜑 → ∀𝑥 ¬ ∀𝑦 ¬ 𝜑))
2624, 25e1a 39368 . . . . . 6 (   𝑥𝑦(𝜑 → ∀𝑥𝜑)   ▶   (¬ ∀𝑦 ¬ 𝜑 → ∀𝑥 ¬ ∀𝑦 ¬ 𝜑)   )
27 df-ex 1860 . . . . . 6 (∃𝑦𝜑 ↔ ¬ ∀𝑦 ¬ 𝜑)
28 imbi1 338 . . . . . . 7 ((∃𝑦𝜑 ↔ ¬ ∀𝑦 ¬ 𝜑) → ((∃𝑦𝜑 → ∀𝑥 ¬ ∀𝑦 ¬ 𝜑) ↔ (¬ ∀𝑦 ¬ 𝜑 → ∀𝑥 ¬ ∀𝑦 ¬ 𝜑)))
2928biimprcd 241 . . . . . 6 ((¬ ∀𝑦 ¬ 𝜑 → ∀𝑥 ¬ ∀𝑦 ¬ 𝜑) → ((∃𝑦𝜑 ↔ ¬ ∀𝑦 ¬ 𝜑) → (∃𝑦𝜑 → ∀𝑥 ¬ ∀𝑦 ¬ 𝜑)))
3026, 27, 29e10 39435 . . . . 5 (   𝑥𝑦(𝜑 → ∀𝑥𝜑)   ▶   (∃𝑦𝜑 → ∀𝑥 ¬ ∀𝑦 ¬ 𝜑)   )
3127albii 1904 . . . . 5 (∀𝑥𝑦𝜑 ↔ ∀𝑥 ¬ ∀𝑦 ¬ 𝜑)
32 imbi2 339 . . . . . 6 ((∀𝑥𝑦𝜑 ↔ ∀𝑥 ¬ ∀𝑦 ¬ 𝜑) → ((∃𝑦𝜑 → ∀𝑥𝑦𝜑) ↔ (∃𝑦𝜑 → ∀𝑥 ¬ ∀𝑦 ¬ 𝜑)))
3332biimprcd 241 . . . . 5 ((∃𝑦𝜑 → ∀𝑥 ¬ ∀𝑦 ¬ 𝜑) → ((∀𝑥𝑦𝜑 ↔ ∀𝑥 ¬ ∀𝑦 ¬ 𝜑) → (∃𝑦𝜑 → ∀𝑥𝑦𝜑)))
3430, 31, 33e10 39435 . . . 4 (   𝑥𝑦(𝜑 → ∀𝑥𝜑)   ▶   (∃𝑦𝜑 → ∀𝑥𝑦𝜑)   )
355, 34gen11nv 39358 . . 3 (   𝑥𝑦(𝜑 → ∀𝑥𝜑)   ▶   𝑦(∃𝑦𝜑 → ∀𝑥𝑦𝜑)   )
361, 35gen11nv 39358 . 2 (   𝑥𝑦(𝜑 → ∀𝑥𝜑)   ▶   𝑥𝑦(∃𝑦𝜑 → ∀𝑥𝑦𝜑)   )
3736in1 39303 1 (∀𝑥𝑦(𝜑 → ∀𝑥𝜑) → ∀𝑥𝑦(∃𝑦𝜑 → ∀𝑥𝑦𝜑))
Colors of variables: wff setvar class
Syntax hints:  ¬ wn 3  wi 4  wb 197  wal 1635  wex 1859
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1877  ax-4 1894  ax-5 2001  ax-6 2069  ax-7 2105  ax-10 2186  ax-11 2202  ax-12 2215
This theorem depends on definitions:  df-bi 198  df-or 866  df-ex 1860  df-nf 1864  df-vd1 39302
This theorem is referenced by: (None)
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