elpglem1 - Mathbox for Emmett Weisz

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Theorem elpglem1 50201

Description: Lemma for elpg 50204. (Contributed by Emmett Weisz, 28-Aug-2021.)

**Assertion**
Ref	Expression
elpglem1	⊢ (∃𝑥(𝑥 ⊆ Pg ∧ ((1^st ‘𝐴) ∈ 𝒫 𝑥 ∧ (2^nd ‘𝐴) ∈ 𝒫 𝑥)) → ((1^st ‘𝐴) ⊆ Pg ∧ (2^nd ‘𝐴) ⊆ Pg))

Distinct variable group: 𝑥,𝐴

**Proof of Theorem elpglem1**
Step	Hyp	Ref	Expression
1		elpwi 4536	. . . . 5 ⊢ ((1^st ‘𝐴) ∈ 𝒫 𝑥 → (1^st ‘𝐴) ⊆ 𝑥)
2	1	adantl 482	. . . 4 ⊢ ((𝑥 ⊆ Pg ∧ (1^st ‘𝐴) ∈ 𝒫 𝑥) → (1^st ‘𝐴) ⊆ 𝑥)
3		simpl 483	. . . 4 ⊢ ((𝑥 ⊆ Pg ∧ (1^st ‘𝐴) ∈ 𝒫 𝑥) → 𝑥 ⊆ Pg)
4	2, 3	sstrd 3925	. . 3 ⊢ ((𝑥 ⊆ Pg ∧ (1^st ‘𝐴) ∈ 𝒫 𝑥) → (1^st ‘𝐴) ⊆ Pg)
5		elpwi 4536	. . . . 5 ⊢ ((2^nd ‘𝐴) ∈ 𝒫 𝑥 → (2^nd ‘𝐴) ⊆ 𝑥)
6	5	adantl 482	. . . 4 ⊢ ((𝑥 ⊆ Pg ∧ (2^nd ‘𝐴) ∈ 𝒫 𝑥) → (2^nd ‘𝐴) ⊆ 𝑥)
7		simpl 483	. . . 4 ⊢ ((𝑥 ⊆ Pg ∧ (2^nd ‘𝐴) ∈ 𝒫 𝑥) → 𝑥 ⊆ Pg)
8	6, 7	sstrd 3925	. . 3 ⊢ ((𝑥 ⊆ Pg ∧ (2^nd ‘𝐴) ∈ 𝒫 𝑥) → (2^nd ‘𝐴) ⊆ Pg)
9	4, 8	anim12dan 625	. 2 ⊢ ((𝑥 ⊆ Pg ∧ ((1^st ‘𝐴) ∈ 𝒫 𝑥 ∧ (2^nd ‘𝐴) ∈ 𝒫 𝑥)) → ((1^st ‘𝐴) ⊆ Pg ∧ (2^nd ‘𝐴) ⊆ Pg))
10	9	exlimiv 1937	1 ⊢ (∃𝑥(𝑥 ⊆ Pg ∧ ((1^st ‘𝐴) ∈ 𝒫 𝑥 ∧ (2^nd ‘𝐴) ∈ 𝒫 𝑥)) → ((1^st ‘𝐴) ⊆ Pg ∧ (2^nd ‘𝐴) ⊆ Pg))

Colors of variables: wff setvar class

Syntax hints: → wi 4 ∧ wa 396 ∃wex 1786 ∈ wcel 2119 ⊆ wss 3883 𝒫 cpw 4529 ‘cfv 6485 1^st c1st 7929 2^nd c2nd 7930 Pgcpg 50199

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1802 ax-4 1816 ax-5 1917 ax-6 1974 ax-7 2015 ax-8 2121 ax-9 2129 ax-ext 2711

This theorem depends on definitions: df-bi 208 df-an 397 df-tru 1550 df-ex 1787 df-sb 2074 df-clab 2718 df-cleq 2731 df-clel 2814 df-ss 3900 df-pw 4531

This theorem is referenced by: elpg 50204