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Theorem cntzrecd 19919
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
StepHypRef 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 2763 . . . . 5 (Base‘𝐺) = (Base‘𝐺)
54subgss 19363 . . . 4 (𝑇 ∈ (SubGrp‘𝐺) → 𝑇 ⊆ (Base‘𝐺))
64subgss 19363 . . . 4 (𝑈 ∈ (SubGrp‘𝐺) → 𝑈 ⊆ (Base‘𝐺))
7 cntzrecd.z . . . . 5 𝑍 = (Cntz‘𝐺)
84, 7cntzrec 19577 . . . 4 ((𝑇 ⊆ (Base‘𝐺) ∧ 𝑈 ⊆ (Base‘𝐺)) → (𝑇 ⊆ (𝑍‘𝑈) ↔ 𝑈 ⊆ (𝑍‘𝑇)))
95, 6, 8syl2an 608 . . 3 ((𝑇 ∈ (SubGrp‘𝐺) ∧ 𝑈 ∈ (SubGrp‘𝐺)) → (𝑇 ⊆ (𝑍‘𝑈) ↔ 𝑈 ⊆ (𝑍‘𝑇)))
102, 3, 9syl2anc 596 . 2 (𝜑 → (𝑇 ⊆ (𝑍‘𝑈) ↔ 𝑈 ⊆ (𝑍‘𝑇)))
111, 10mpbid 235 1 (𝜑 → 𝑈 ⊆ (𝑍‘𝑇))
Colors of variables:    wff setvar class
This proof depends on syntax axioms:   → wi 4   ↔ wb 209   = wceq 1570   ∈ wcel 2147   ⊆ wss 3900  ‘cfv 6555  Basecbs 17413  SubGrpcsubg 19356  Cntzccntz 19556
This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1828  ax-4 1842  ax-5 1945  ax-6 2002  ax-7 2043  ax-8 2149  ax-9 2157  ax-10 2180  ax-11 2197  ax-12 2216  ax-ext 2735  ax-rep 5235  ax-sep 5252  ax-nul 5263  ax-pow 5331  ax-pr 5395
This proof depends on definitions:  df-bi 210  df-an 402  df-or 862  df-3an 1105  df-tru 1573  df-fal 1583  df-ex 1813  df-nf 1817  df-sb 2102  df-mo 2567  df-eu 2597  df-clab 2742  df-cleq 2755  df-clel 2839  df-nfc 2913  df-ne 2960  df-ral 3081  df-rex 3091  df-reu 3370  df-rab 3417  df-v 3456  df-sbc 3743  df-csb 3852  df-ss 3901  df-dif 4050  df-in 4094  df-un 4154  df-nul 4282  df-if 4486  df-pw 4562  df-sn 4589  df-pr 4591  df-op 4839  df-uni 4871  df-iun 4956  df-br 5107  df-opab 5171  df-mpt 5190  df-id 5550  df-xp 5661  df-rel 5662  df-cnv 5663  df-co 5664  df-dm 5665  df-rn 5666  df-res 5667  df-ima 5668  df-iota 6509  df-fun 6557  df-fn 6558  df-f 6559  df-f1 6560  df-fo 6561  df-f1o 6562  df-fv 6563  df-ov 7443  df-subg 19359  df-cntz 19558
This theorem is used by:  subgdisj2  19933  pj2f  19939  pj1id  19940  dprdcntz2  20281  dmdprdsplit2lem  20288  dmdprdsplit2  20289
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