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Theorem mddmd2 30092
Description: Relationship between modular pairs and dual-modular pairs. Lemma 1.2 of [MaedaMaeda] p. 1. (Contributed by NM, 21-Jun-2004.) (New usage is discouraged.)
Assertion
Ref Expression
mddmd2 (𝐴C → (∀𝑥C 𝐴 𝑀 𝑥 ↔ ∀𝑥C 𝐴 𝑀* 𝑥))
Distinct variable group:   𝑥,𝐴

Proof of Theorem mddmd2
Dummy variable 𝑦 is distinct from all other variables.
StepHypRef Expression
1 breq2 5034 . . . . 5 (𝑥 = 𝑦 → (𝐴 𝑀 𝑥𝐴 𝑀 𝑦))
21cbvralvw 3396 . . . 4 (∀𝑥C 𝐴 𝑀 𝑥 ↔ ∀𝑦C 𝐴 𝑀 𝑦)
3 mdbr 30077 . . . . . 6 ((𝐴C𝑦C ) → (𝐴 𝑀 𝑦 ↔ ∀𝑥C (𝑥𝑦 → ((𝑥 𝐴) ∩ 𝑦) = (𝑥 (𝐴𝑦)))))
4 incom 4128 . . . . . . . . . . . 12 ((𝐴 𝑥) ∩ 𝑦) = (𝑦 ∩ (𝐴 𝑥))
5 chjcom 29289 . . . . . . . . . . . . 13 ((𝐴C𝑥C ) → (𝐴 𝑥) = (𝑥 𝐴))
65ineq1d 4138 . . . . . . . . . . . 12 ((𝐴C𝑥C ) → ((𝐴 𝑥) ∩ 𝑦) = ((𝑥 𝐴) ∩ 𝑦))
74, 6syl5reqr 2848 . . . . . . . . . . 11 ((𝐴C𝑥C ) → ((𝑥 𝐴) ∩ 𝑦) = (𝑦 ∩ (𝐴 𝑥)))
87adantlr 714 . . . . . . . . . 10 (((𝐴C𝑦C ) ∧ 𝑥C ) → ((𝑥 𝐴) ∩ 𝑦) = (𝑦 ∩ (𝐴 𝑥)))
9 incom 4128 . . . . . . . . . . . 12 (𝐴𝑦) = (𝑦𝐴)
109oveq1i 7145 . . . . . . . . . . 11 ((𝐴𝑦) ∨ 𝑥) = ((𝑦𝐴) ∨ 𝑥)
11 chincl 29282 . . . . . . . . . . . 12 ((𝐴C𝑦C ) → (𝐴𝑦) ∈ C )
12 chjcom 29289 . . . . . . . . . . . 12 (((𝐴𝑦) ∈ C𝑥C ) → ((𝐴𝑦) ∨ 𝑥) = (𝑥 (𝐴𝑦)))
1311, 12sylan 583 . . . . . . . . . . 11 (((𝐴C𝑦C ) ∧ 𝑥C ) → ((𝐴𝑦) ∨ 𝑥) = (𝑥 (𝐴𝑦)))
1410, 13syl5reqr 2848 . . . . . . . . . 10 (((𝐴C𝑦C ) ∧ 𝑥C ) → (𝑥 (𝐴𝑦)) = ((𝑦𝐴) ∨ 𝑥))
158, 14eqeq12d 2814 . . . . . . . . 9 (((𝐴C𝑦C ) ∧ 𝑥C ) → (((𝑥 𝐴) ∩ 𝑦) = (𝑥 (𝐴𝑦)) ↔ (𝑦 ∩ (𝐴 𝑥)) = ((𝑦𝐴) ∨ 𝑥)))
16 eqcom 2805 . . . . . . . . 9 ((𝑦 ∩ (𝐴 𝑥)) = ((𝑦𝐴) ∨ 𝑥) ↔ ((𝑦𝐴) ∨ 𝑥) = (𝑦 ∩ (𝐴 𝑥)))
1715, 16syl6bb 290 . . . . . . . 8 (((𝐴C𝑦C ) ∧ 𝑥C ) → (((𝑥 𝐴) ∩ 𝑦) = (𝑥 (𝐴𝑦)) ↔ ((𝑦𝐴) ∨ 𝑥) = (𝑦 ∩ (𝐴 𝑥))))
1817imbi2d 344 . . . . . . 7 (((𝐴C𝑦C ) ∧ 𝑥C ) → ((𝑥𝑦 → ((𝑥 𝐴) ∩ 𝑦) = (𝑥 (𝐴𝑦))) ↔ (𝑥𝑦 → ((𝑦𝐴) ∨ 𝑥) = (𝑦 ∩ (𝐴 𝑥)))))
1918ralbidva 3161 . . . . . 6 ((𝐴C𝑦C ) → (∀𝑥C (𝑥𝑦 → ((𝑥 𝐴) ∩ 𝑦) = (𝑥 (𝐴𝑦))) ↔ ∀𝑥C (𝑥𝑦 → ((𝑦𝐴) ∨ 𝑥) = (𝑦 ∩ (𝐴 𝑥)))))
203, 19bitrd 282 . . . . 5 ((𝐴C𝑦C ) → (𝐴 𝑀 𝑦 ↔ ∀𝑥C (𝑥𝑦 → ((𝑦𝐴) ∨ 𝑥) = (𝑦 ∩ (𝐴 𝑥)))))
2120ralbidva 3161 . . . 4 (𝐴C → (∀𝑦C 𝐴 𝑀 𝑦 ↔ ∀𝑦C𝑥C (𝑥𝑦 → ((𝑦𝐴) ∨ 𝑥) = (𝑦 ∩ (𝐴 𝑥)))))
222, 21syl5bb 286 . . 3 (𝐴C → (∀𝑥C 𝐴 𝑀 𝑥 ↔ ∀𝑦C𝑥C (𝑥𝑦 → ((𝑦𝐴) ∨ 𝑥) = (𝑦 ∩ (𝐴 𝑥)))))
23 ralcom 3307 . . 3 (∀𝑦C𝑥C (𝑥𝑦 → ((𝑦𝐴) ∨ 𝑥) = (𝑦 ∩ (𝐴 𝑥))) ↔ ∀𝑥C𝑦C (𝑥𝑦 → ((𝑦𝐴) ∨ 𝑥) = (𝑦 ∩ (𝐴 𝑥))))
2422, 23syl6bb 290 . 2 (𝐴C → (∀𝑥C 𝐴 𝑀 𝑥 ↔ ∀𝑥C𝑦C (𝑥𝑦 → ((𝑦𝐴) ∨ 𝑥) = (𝑦 ∩ (𝐴 𝑥)))))
25 dmdbr 30082 . . 3 ((𝐴C𝑥C ) → (𝐴 𝑀* 𝑥 ↔ ∀𝑦C (𝑥𝑦 → ((𝑦𝐴) ∨ 𝑥) = (𝑦 ∩ (𝐴 𝑥)))))
2625ralbidva 3161 . 2 (𝐴C → (∀𝑥C 𝐴 𝑀* 𝑥 ↔ ∀𝑥C𝑦C (𝑥𝑦 → ((𝑦𝐴) ∨ 𝑥) = (𝑦 ∩ (𝐴 𝑥)))))
2724, 26bitr4d 285 1 (𝐴C → (∀𝑥C 𝐴 𝑀 𝑥 ↔ ∀𝑥C 𝐴 𝑀* 𝑥))
Colors of variables: wff setvar class
Syntax hints:  wi 4  wb 209  wa 399   = wceq 1538  wcel 2111  wral 3106  cin 3880  wss 3881   class class class wbr 5030  (class class class)co 7135   C cch 28712   chj 28716   𝑀 cmd 28749   𝑀* cdmd 28750
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1797  ax-4 1811  ax-5 1911  ax-6 1970  ax-7 2015  ax-8 2113  ax-9 2121  ax-10 2142  ax-11 2158  ax-12 2175  ax-ext 2770  ax-rep 5154  ax-sep 5167  ax-nul 5174  ax-pow 5231  ax-pr 5295  ax-un 7441  ax-cnex 10582  ax-1cn 10584  ax-addcl 10586  ax-hilex 28782  ax-hfvadd 28783  ax-hv0cl 28786  ax-hfvmul 28788
This theorem depends on definitions:  df-bi 210  df-an 400  df-or 845  df-3or 1085  df-3an 1086  df-tru 1541  df-ex 1782  df-nf 1786  df-sb 2070  df-mo 2598  df-eu 2629  df-clab 2777  df-cleq 2791  df-clel 2870  df-nfc 2938  df-ne 2988  df-ral 3111  df-rex 3112  df-reu 3113  df-rab 3115  df-v 3443  df-sbc 3721  df-csb 3829  df-dif 3884  df-un 3886  df-in 3888  df-ss 3898  df-pss 3900  df-nul 4244  df-if 4426  df-pw 4499  df-sn 4526  df-pr 4528  df-tp 4530  df-op 4532  df-uni 4801  df-int 4839  df-iun 4883  df-br 5031  df-opab 5093  df-mpt 5111  df-tr 5137  df-id 5425  df-eprel 5430  df-po 5438  df-so 5439  df-fr 5478  df-we 5480  df-xp 5525  df-rel 5526  df-cnv 5527  df-co 5528  df-dm 5529  df-rn 5530  df-res 5531  df-ima 5532  df-pred 6116  df-ord 6162  df-on 6163  df-lim 6164  df-suc 6165  df-iota 6283  df-fun 6326  df-fn 6327  df-f 6328  df-f1 6329  df-fo 6330  df-f1o 6331  df-fv 6332  df-ov 7138  df-oprab 7139  df-mpo 7140  df-om 7561  df-wrecs 7930  df-recs 7991  df-rdg 8029  df-map 8391  df-nn 11626  df-hlim 28755  df-sh 28990  df-ch 29004  df-chj 29093  df-md 30063  df-dmd 30064
This theorem is referenced by:  atmd  30182
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