Theorem pwtrVD 44815

Description: Virtual deduction proof of pwtr 5432; see pwtrrVD 44816 for the converse. (Contributed by Alan Sare, 25-Aug-2011.) (Proof modification is discouraged.) (New usage is discouraged.)

Assertion

Ref	Expression
pwtrVD	⊢ (Tr 𝐴 → Tr 𝒫 𝐴)

Proof of Theorem pwtrVD

Dummy variables 𝑧 𝑦 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		dftr2 5236	. . 3 ⊢ (Tr 𝒫 𝐴 ↔ ∀𝑧∀𝑦((𝑧 ∈ 𝑦 ∧ 𝑦 ∈ 𝒫 𝐴) → 𝑧 ∈ 𝒫 𝐴))
2		idn1 44566	. . . . . . 7 ⊢ (   Tr 𝐴   ▶   Tr 𝐴   )
3		idn2 44605	. . . . . . . . . 10 ⊢ (   Tr 𝐴   ,   (𝑧 ∈ 𝑦 ∧ 𝑦 ∈ 𝒫 𝐴)   ▶   (𝑧 ∈ 𝑦 ∧ 𝑦 ∈ 𝒫 𝐴)   )
4		simpr 484	. . . . . . . . . 10 ⊢ ((𝑧 ∈ 𝑦 ∧ 𝑦 ∈ 𝒫 𝐴) → 𝑦 ∈ 𝒫 𝐴)
5	3, 4	e2 44623	. . . . . . . . 9 ⊢ (   Tr 𝐴   ,   (𝑧 ∈ 𝑦 ∧ 𝑦 ∈ 𝒫 𝐴)   ▶   𝑦 ∈ 𝒫 𝐴   )
6		elpwi 4587	. . . . . . . . 9 ⊢ (𝑦 ∈ 𝒫 𝐴 → 𝑦 ⊆ 𝐴)
7	5, 6	e2 44623	. . . . . . . 8 ⊢ (   Tr 𝐴   ,   (𝑧 ∈ 𝑦 ∧ 𝑦 ∈ 𝒫 𝐴)   ▶   𝑦 ⊆ 𝐴   )
8		simpl 482	. . . . . . . . 9 ⊢ ((𝑧 ∈ 𝑦 ∧ 𝑦 ∈ 𝒫 𝐴) → 𝑧 ∈ 𝑦)
9	3, 8	e2 44623	. . . . . . . 8 ⊢ (   Tr 𝐴   ,   (𝑧 ∈ 𝑦 ∧ 𝑦 ∈ 𝒫 𝐴)   ▶   𝑧 ∈ 𝑦   )
10		ssel 3957	. . . . . . . 8 ⊢ (𝑦 ⊆ 𝐴 → (𝑧 ∈ 𝑦 → 𝑧 ∈ 𝐴))
11	7, 9, 10	e22 44663	. . . . . . 7 ⊢ (   Tr 𝐴   ,   (𝑧 ∈ 𝑦 ∧ 𝑦 ∈ 𝒫 𝐴)   ▶   𝑧 ∈ 𝐴   )
12		trss 5245	. . . . . . 7 ⊢ (Tr 𝐴 → (𝑧 ∈ 𝐴 → 𝑧 ⊆ 𝐴))
13	2, 11, 12	e12 44715	. . . . . 6 ⊢ (   Tr 𝐴   ,   (𝑧 ∈ 𝑦 ∧ 𝑦 ∈ 𝒫 𝐴)   ▶   𝑧 ⊆ 𝐴   )
14		vex 3468	. . . . . . 7 ⊢ 𝑧 ∈ V
15	14	elpw 4584	. . . . . 6 ⊢ (𝑧 ∈ 𝒫 𝐴 ↔ 𝑧 ⊆ 𝐴)
16	13, 15	e2bir 44625	. . . . 5 ⊢ (   Tr 𝐴   ,   (𝑧 ∈ 𝑦 ∧ 𝑦 ∈ 𝒫 𝐴)   ▶   𝑧 ∈ 𝒫 𝐴   )
17	16	in2 44597	. . . 4 ⊢ (   Tr 𝐴   ▶   ((𝑧 ∈ 𝑦 ∧ 𝑦 ∈ 𝒫 𝐴) → 𝑧 ∈ 𝒫 𝐴)   )
18	17	gen12 44610	. . 3 ⊢ (   Tr 𝐴   ▶   ∀𝑧∀𝑦((𝑧 ∈ 𝑦 ∧ 𝑦 ∈ 𝒫 𝐴) → 𝑧 ∈ 𝒫 𝐴)   )
19		biimpr 220	. . 3 ⊢ ((Tr 𝒫 𝐴 ↔ ∀𝑧∀𝑦((𝑧 ∈ 𝑦 ∧ 𝑦 ∈ 𝒫 𝐴) → 𝑧 ∈ 𝒫 𝐴)) → (∀𝑧∀𝑦((𝑧 ∈ 𝑦 ∧ 𝑦 ∈ 𝒫 𝐴) → 𝑧 ∈ 𝒫 𝐴) → Tr 𝒫 𝐴))
20	1, 18, 19	e01 44683	. 2 ⊢ (   Tr 𝐴   ▶   Tr 𝒫 𝐴   )
21	20	in1 44563	1 ⊢ (Tr 𝐴 → Tr 𝒫 𝐴)

Syntax hints:   → wi 4   ↔ wb 206   ∧ wa 395  ∀wal 1538   ∈ wcel 2109   ⊆ wss 3931  𝒫 cpw 4580  Tr wtr 5234

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1795  ax-4 1809  ax-5 1910  ax-6 1967  ax-7 2008  ax-8 2111  ax-9 2119  ax-ext 2708

This theorem depends on definitions:  df-bi 207  df-an 396  df-tru 1543  df-ex 1780  df-sb 2066  df-clab 2715  df-cleq 2728  df-clel 2810  df-ral 3053  df-v 3466  df-ss 3948  df-pw 4582  df-uni 4889  df-tr 5235  df-vd1 44562  df-vd2 44570

This theorem is referenced by: (None)