Theorem cntzrecd 19663

Description: Commute the "subgroups commute" predicate. (Contributed by Mario Carneiro, 21-Apr-2016.)

Hypotheses

Ref	Expression
cntzrecd.z	⊢ 𝑍 = (Cntz‘𝐺)
cntzrecd.t	⊢ (𝜑 → 𝑇 ∈ (SubGrp‘𝐺))
cntzrecd.u	⊢ (𝜑 → 𝑈 ∈ (SubGrp‘𝐺))
cntzrecd.s	⊢ (𝜑 → 𝑇 ⊆ (𝑍‘𝑈))

Assertion

Ref	Expression
cntzrecd	⊢ (𝜑 → 𝑈 ⊆ (𝑍‘𝑇))

Proof of Theorem cntzrecd

Step	Hyp	Ref	Expression
1		cntzrecd.s	. 2 ⊢ (𝜑 → 𝑇 ⊆ (𝑍‘𝑈))
2		cntzrecd.t	. . 3 ⊢ (𝜑 → 𝑇 ∈ (SubGrp‘𝐺))
3		cntzrecd.u	. . 3 ⊢ (𝜑 → 𝑈 ∈ (SubGrp‘𝐺))
4		eqid 2734	. . . . 5 ⊢ (Base‘𝐺) = (Base‘𝐺)
5	4	subgss 19113	. . . 4 ⊢ (𝑇 ∈ (SubGrp‘𝐺) → 𝑇 ⊆ (Base‘𝐺))
6	4	subgss 19113	. . . 4 ⊢ (𝑈 ∈ (SubGrp‘𝐺) → 𝑈 ⊆ (Base‘𝐺))
7		cntzrecd.z	. . . . 5 ⊢ 𝑍 = (Cntz‘𝐺)
8	4, 7	cntzrec 19322	. . . 4 ⊢ ((𝑇 ⊆ (Base‘𝐺) ∧ 𝑈 ⊆ (Base‘𝐺)) → (𝑇 ⊆ (𝑍‘𝑈) ↔ 𝑈 ⊆ (𝑍‘𝑇)))
9	5, 6, 8	syl2an 596	. . 3 ⊢ ((𝑇 ∈ (SubGrp‘𝐺) ∧ 𝑈 ∈ (SubGrp‘𝐺)) → (𝑇 ⊆ (𝑍‘𝑈) ↔ 𝑈 ⊆ (𝑍‘𝑇)))
10	2, 3, 9	syl2anc 584	. 2 ⊢ (𝜑 → (𝑇 ⊆ (𝑍‘𝑈) ↔ 𝑈 ⊆ (𝑍‘𝑇)))
11	1, 10	mpbid 232	1 ⊢ (𝜑 → 𝑈 ⊆ (𝑍‘𝑇))

Syntax hints:   → wi 4   ↔ wb 206   = wceq 1539   ∈ wcel 2107   ⊆ wss 3931  ‘cfv 6540  Basecbs 17228  SubGrpcsubg 19106  Cntzccntz 19301

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1794  ax-4 1808  ax-5 1909  ax-6 1966  ax-7 2006  ax-8 2109  ax-9 2117  ax-10 2140  ax-11 2156  ax-12 2176  ax-ext 2706  ax-rep 5259  ax-sep 5276  ax-nul 5286  ax-pow 5345  ax-pr 5412

This theorem depends on definitions:  df-bi 207  df-an 396  df-or 848  df-3an 1088  df-tru 1542  df-fal 1552  df-ex 1779  df-nf 1783  df-sb 2064  df-mo 2538  df-eu 2567  df-clab 2713  df-cleq 2726  df-clel 2808  df-nfc 2884  df-ne 2932  df-ral 3051  df-rex 3060  df-reu 3364  df-rab 3420  df-v 3465  df-sbc 3771  df-csb 3880  df-dif 3934  df-un 3936  df-in 3938  df-ss 3948  df-nul 4314  df-if 4506  df-pw 4582  df-sn 4607  df-pr 4609  df-op 4613  df-uni 4888  df-iun 4973  df-br 5124  df-opab 5186  df-mpt 5206  df-id 5558  df-xp 5671  df-rel 5672  df-cnv 5673  df-co 5674  df-dm 5675  df-rn 5676  df-res 5677  df-ima 5678  df-iota 6493  df-fun 6542  df-fn 6543  df-f 6544  df-f1 6545  df-fo 6546  df-f1o 6547  df-fv 6548  df-ov 7415  df-subg 19109  df-cntz 19303

This theorem is referenced by:  subgdisj2  19677  pj2f  19683  pj1id  19684  dprdcntz2  20025  dmdprdsplit2lem  20032  dmdprdsplit2  20033