Theorem cntzrecd 19627

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 2728	. . . . 5 ⊢ (Base‘𝐺) = (Base‘𝐺)
5	4	subgss 19076	. . . 4 ⊢ (𝑇 ∈ (SubGrp‘𝐺) → 𝑇 ⊆ (Base‘𝐺))
6	4	subgss 19076	. . . 4 ⊢ (𝑈 ∈ (SubGrp‘𝐺) → 𝑈 ⊆ (Base‘𝐺))
7		cntzrecd.z	. . . . 5 ⊢ 𝑍 = (Cntz‘𝐺)
8	4, 7	cntzrec 19281	. . . 4 ⊢ ((𝑇 ⊆ (Base‘𝐺) ∧ 𝑈 ⊆ (Base‘𝐺)) → (𝑇 ⊆ (𝑍‘𝑈) ↔ 𝑈 ⊆ (𝑍‘𝑇)))
9	5, 6, 8	syl2an 595	. . 3 ⊢ ((𝑇 ∈ (SubGrp‘𝐺) ∧ 𝑈 ∈ (SubGrp‘𝐺)) → (𝑇 ⊆ (𝑍‘𝑈) ↔ 𝑈 ⊆ (𝑍‘𝑇)))
10	2, 3, 9	syl2anc 583	. 2 ⊢ (𝜑 → (𝑇 ⊆ (𝑍‘𝑈) ↔ 𝑈 ⊆ (𝑍‘𝑇)))
11	1, 10	mpbid 231	1 ⊢ (𝜑 → 𝑈 ⊆ (𝑍‘𝑇))

Syntax hints:   → wi 4   ↔ wb 205   = wceq 1534   ∈ wcel 2099   ⊆ wss 3945  ‘cfv 6543  Basecbs 17174  SubGrpcsubg 19069  Cntzccntz 19260

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1790  ax-4 1804  ax-5 1906  ax-6 1964  ax-7 2004  ax-8 2101  ax-9 2109  ax-10 2130  ax-11 2147  ax-12 2167  ax-ext 2699  ax-rep 5280  ax-sep 5294  ax-nul 5301  ax-pow 5360  ax-pr 5424

This theorem depends on definitions:  df-bi 206  df-an 396  df-or 847  df-3an 1087  df-tru 1537  df-fal 1547  df-ex 1775  df-nf 1779  df-sb 2061  df-mo 2530  df-eu 2559  df-clab 2706  df-cleq 2720  df-clel 2806  df-nfc 2881  df-ne 2937  df-ral 3058  df-rex 3067  df-reu 3373  df-rab 3429  df-v 3472  df-sbc 3776  df-csb 3891  df-dif 3948  df-un 3950  df-in 3952  df-ss 3962  df-nul 4320  df-if 4526  df-pw 4601  df-sn 4626  df-pr 4628  df-op 4632  df-uni 4905  df-iun 4994  df-br 5144  df-opab 5206  df-mpt 5227  df-id 5571  df-xp 5679  df-rel 5680  df-cnv 5681  df-co 5682  df-dm 5683  df-rn 5684  df-res 5685  df-ima 5686  df-iota 6495  df-fun 6545  df-fn 6546  df-f 6547  df-f1 6548  df-fo 6549  df-f1o 6550  df-fv 6551  df-ov 7418  df-subg 19072  df-cntz 19262

This theorem is referenced by:  subgdisj2  19641  pj2f  19647  pj1id  19648  dprdcntz2  19989  dmdprdsplit2lem  19996  dmdprdsplit2  19997