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Theorem cntzi 18389
Description: Membership in a centralizer (inference). (Contributed by Stefan O'Rear, 6-Sep-2015.) (Revised by Mario Carneiro, 22-Sep-2015.)
Hypotheses
Ref Expression
cntzi.p + = (+g𝑀)
cntzi.z 𝑍 = (Cntz‘𝑀)
Assertion
Ref Expression
cntzi ((𝑋 ∈ (𝑍𝑆) ∧ 𝑌𝑆) → (𝑋 + 𝑌) = (𝑌 + 𝑋))

Proof of Theorem cntzi
Dummy variable 𝑦 is distinct from all other variables.
StepHypRef Expression
1 eqid 2826 . . . . . 6 (Base‘𝑀) = (Base‘𝑀)
2 cntzi.z . . . . . 6 𝑍 = (Cntz‘𝑀)
31, 2cntzrcl 18387 . . . . 5 (𝑋 ∈ (𝑍𝑆) → (𝑀 ∈ V ∧ 𝑆 ⊆ (Base‘𝑀)))
4 cntzi.p . . . . . 6 + = (+g𝑀)
51, 4, 2elcntz 18382 . . . . 5 (𝑆 ⊆ (Base‘𝑀) → (𝑋 ∈ (𝑍𝑆) ↔ (𝑋 ∈ (Base‘𝑀) ∧ ∀𝑦𝑆 (𝑋 + 𝑦) = (𝑦 + 𝑋))))
63, 5simpl2im 504 . . . 4 (𝑋 ∈ (𝑍𝑆) → (𝑋 ∈ (𝑍𝑆) ↔ (𝑋 ∈ (Base‘𝑀) ∧ ∀𝑦𝑆 (𝑋 + 𝑦) = (𝑦 + 𝑋))))
76simplbda 500 . . 3 ((𝑋 ∈ (𝑍𝑆) ∧ 𝑋 ∈ (𝑍𝑆)) → ∀𝑦𝑆 (𝑋 + 𝑦) = (𝑦 + 𝑋))
87anidms 567 . 2 (𝑋 ∈ (𝑍𝑆) → ∀𝑦𝑆 (𝑋 + 𝑦) = (𝑦 + 𝑋))
9 oveq2 7156 . . . 4 (𝑦 = 𝑌 → (𝑋 + 𝑦) = (𝑋 + 𝑌))
10 oveq1 7155 . . . 4 (𝑦 = 𝑌 → (𝑦 + 𝑋) = (𝑌 + 𝑋))
119, 10eqeq12d 2842 . . 3 (𝑦 = 𝑌 → ((𝑋 + 𝑦) = (𝑦 + 𝑋) ↔ (𝑋 + 𝑌) = (𝑌 + 𝑋)))
1211rspccva 3626 . 2 ((∀𝑦𝑆 (𝑋 + 𝑦) = (𝑦 + 𝑋) ∧ 𝑌𝑆) → (𝑋 + 𝑌) = (𝑌 + 𝑋))
138, 12sylan 580 1 ((𝑋 ∈ (𝑍𝑆) ∧ 𝑌𝑆) → (𝑋 + 𝑌) = (𝑌 + 𝑋))
Colors of variables: wff setvar class
Syntax hints:  wi 4  wb 207  wa 396   = wceq 1530  wcel 2107  wral 3143  Vcvv 3500  wss 3940  cfv 6352  (class class class)co 7148  Basecbs 16473  +gcplusg 16555  Cntzccntz 18375
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1789  ax-4 1803  ax-5 1904  ax-6 1963  ax-7 2008  ax-8 2109  ax-9 2117  ax-10 2138  ax-11 2153  ax-12 2169  ax-ext 2798  ax-rep 5187  ax-sep 5200  ax-nul 5207  ax-pow 5263  ax-pr 5326
This theorem depends on definitions:  df-bi 208  df-an 397  df-or 844  df-3an 1083  df-tru 1533  df-ex 1774  df-nf 1778  df-sb 2063  df-mo 2620  df-eu 2652  df-clab 2805  df-cleq 2819  df-clel 2898  df-nfc 2968  df-ne 3022  df-ral 3148  df-rex 3149  df-reu 3150  df-rab 3152  df-v 3502  df-sbc 3777  df-csb 3888  df-dif 3943  df-un 3945  df-in 3947  df-ss 3956  df-nul 4296  df-if 4471  df-pw 4544  df-sn 4565  df-pr 4567  df-op 4571  df-uni 4838  df-iun 4919  df-br 5064  df-opab 5126  df-mpt 5144  df-id 5459  df-xp 5560  df-rel 5561  df-cnv 5562  df-co 5563  df-dm 5564  df-rn 5565  df-res 5566  df-ima 5567  df-iota 6312  df-fun 6354  df-fn 6355  df-f 6356  df-f1 6357  df-fo 6358  df-f1o 6359  df-fv 6360  df-ov 7151  df-cntz 18377
This theorem is referenced by:  cntri  18391  cntz2ss  18393  cntzsubm  18396  cntzsubg  18397  cntzmhm  18399  cntrsubgnsg  18401  lsmsubm  18698  lsmsubg  18699  lsmcom2  18700  subgdisj1  18737  subgdisj2  18738  pj1id  18745  pj1ghm  18749  gsumval3eu  18944  gsumval3  18947  gsumzaddlem  18961  gsumzoppg  18984  dprdfcntz  19057  cntzsubr  19488  cntzsdrg  19501
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