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Theorem isdlat 17415
 Description: Property of being a distributive lattice. (Contributed by Stefan O'Rear, 30-Jan-2015.)
Hypotheses
Ref Expression
isdlat.b 𝐵 = (Base‘𝐾)
isdlat.j = (join‘𝐾)
isdlat.m = (meet‘𝐾)
Assertion
Ref Expression
isdlat (𝐾 ∈ DLat ↔ (𝐾 ∈ Lat ∧ ∀𝑥𝐵𝑦𝐵𝑧𝐵 (𝑥 (𝑦 𝑧)) = ((𝑥 𝑦) (𝑥 𝑧))))
Distinct variable groups:   𝑥,𝑦,𝑧,𝐾   𝑥,𝐵,𝑦,𝑧   𝑥, ,𝑦,𝑧   𝑥, ,𝑦,𝑧

Proof of Theorem isdlat
Dummy variables 𝑘 𝑏 𝑗 𝑚 are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 fveq2 6354 . . . . 5 (𝑘 = 𝐾 → (Base‘𝑘) = (Base‘𝐾))
2 isdlat.b . . . . 5 𝐵 = (Base‘𝐾)
31, 2syl6eqr 2813 . . . 4 (𝑘 = 𝐾 → (Base‘𝑘) = 𝐵)
4 fveq2 6354 . . . . . 6 (𝑘 = 𝐾 → (join‘𝑘) = (join‘𝐾))
5 isdlat.j . . . . . 6 = (join‘𝐾)
64, 5syl6eqr 2813 . . . . 5 (𝑘 = 𝐾 → (join‘𝑘) = )
7 fveq2 6354 . . . . . . 7 (𝑘 = 𝐾 → (meet‘𝑘) = (meet‘𝐾))
8 isdlat.m . . . . . . 7 = (meet‘𝐾)
97, 8syl6eqr 2813 . . . . . 6 (𝑘 = 𝐾 → (meet‘𝑘) = )
109sbceq1d 3582 . . . . 5 (𝑘 = 𝐾 → ([(meet‘𝑘) / 𝑚]𝑥𝑏𝑦𝑏𝑧𝑏 (𝑥𝑚(𝑦𝑗𝑧)) = ((𝑥𝑚𝑦)𝑗(𝑥𝑚𝑧)) ↔ [ / 𝑚]𝑥𝑏𝑦𝑏𝑧𝑏 (𝑥𝑚(𝑦𝑗𝑧)) = ((𝑥𝑚𝑦)𝑗(𝑥𝑚𝑧))))
116, 10sbceqbid 3584 . . . 4 (𝑘 = 𝐾 → ([(join‘𝑘) / 𝑗][(meet‘𝑘) / 𝑚]𝑥𝑏𝑦𝑏𝑧𝑏 (𝑥𝑚(𝑦𝑗𝑧)) = ((𝑥𝑚𝑦)𝑗(𝑥𝑚𝑧)) ↔ [ / 𝑗][ / 𝑚]𝑥𝑏𝑦𝑏𝑧𝑏 (𝑥𝑚(𝑦𝑗𝑧)) = ((𝑥𝑚𝑦)𝑗(𝑥𝑚𝑧))))
123, 11sbceqbid 3584 . . 3 (𝑘 = 𝐾 → ([(Base‘𝑘) / 𝑏][(join‘𝑘) / 𝑗][(meet‘𝑘) / 𝑚]𝑥𝑏𝑦𝑏𝑧𝑏 (𝑥𝑚(𝑦𝑗𝑧)) = ((𝑥𝑚𝑦)𝑗(𝑥𝑚𝑧)) ↔ [𝐵 / 𝑏][ / 𝑗][ / 𝑚]𝑥𝑏𝑦𝑏𝑧𝑏 (𝑥𝑚(𝑦𝑗𝑧)) = ((𝑥𝑚𝑦)𝑗(𝑥𝑚𝑧))))
13 fvex 6364 . . . . 5 (Base‘𝐾) ∈ V
142, 13eqeltri 2836 . . . 4 𝐵 ∈ V
15 fvex 6364 . . . . 5 (join‘𝐾) ∈ V
165, 15eqeltri 2836 . . . 4 ∈ V
17 fvex 6364 . . . . 5 (meet‘𝐾) ∈ V
188, 17eqeltri 2836 . . . 4 ∈ V
19 raleq 3278 . . . . . . . 8 (𝑏 = 𝐵 → (∀𝑧𝑏 (𝑥𝑚(𝑦𝑗𝑧)) = ((𝑥𝑚𝑦)𝑗(𝑥𝑚𝑧)) ↔ ∀𝑧𝐵 (𝑥𝑚(𝑦𝑗𝑧)) = ((𝑥𝑚𝑦)𝑗(𝑥𝑚𝑧))))
2019raleqbi1dv 3286 . . . . . . 7 (𝑏 = 𝐵 → (∀𝑦𝑏𝑧𝑏 (𝑥𝑚(𝑦𝑗𝑧)) = ((𝑥𝑚𝑦)𝑗(𝑥𝑚𝑧)) ↔ ∀𝑦𝐵𝑧𝐵 (𝑥𝑚(𝑦𝑗𝑧)) = ((𝑥𝑚𝑦)𝑗(𝑥𝑚𝑧))))
2120raleqbi1dv 3286 . . . . . 6 (𝑏 = 𝐵 → (∀𝑥𝑏𝑦𝑏𝑧𝑏 (𝑥𝑚(𝑦𝑗𝑧)) = ((𝑥𝑚𝑦)𝑗(𝑥𝑚𝑧)) ↔ ∀𝑥𝐵𝑦𝐵𝑧𝐵 (𝑥𝑚(𝑦𝑗𝑧)) = ((𝑥𝑚𝑦)𝑗(𝑥𝑚𝑧))))
22 simpr 479 . . . . . . . . . 10 ((𝑗 = 𝑚 = ) → 𝑚 = )
23 eqidd 2762 . . . . . . . . . 10 ((𝑗 = 𝑚 = ) → 𝑥 = 𝑥)
24 simpl 474 . . . . . . . . . . 11 ((𝑗 = 𝑚 = ) → 𝑗 = )
2524oveqd 6832 . . . . . . . . . 10 ((𝑗 = 𝑚 = ) → (𝑦𝑗𝑧) = (𝑦 𝑧))
2622, 23, 25oveq123d 6836 . . . . . . . . 9 ((𝑗 = 𝑚 = ) → (𝑥𝑚(𝑦𝑗𝑧)) = (𝑥 (𝑦 𝑧)))
2722oveqd 6832 . . . . . . . . . 10 ((𝑗 = 𝑚 = ) → (𝑥𝑚𝑦) = (𝑥 𝑦))
2822oveqd 6832 . . . . . . . . . 10 ((𝑗 = 𝑚 = ) → (𝑥𝑚𝑧) = (𝑥 𝑧))
2924, 27, 28oveq123d 6836 . . . . . . . . 9 ((𝑗 = 𝑚 = ) → ((𝑥𝑚𝑦)𝑗(𝑥𝑚𝑧)) = ((𝑥 𝑦) (𝑥 𝑧)))
3026, 29eqeq12d 2776 . . . . . . . 8 ((𝑗 = 𝑚 = ) → ((𝑥𝑚(𝑦𝑗𝑧)) = ((𝑥𝑚𝑦)𝑗(𝑥𝑚𝑧)) ↔ (𝑥 (𝑦 𝑧)) = ((𝑥 𝑦) (𝑥 𝑧))))
3130ralbidv 3125 . . . . . . 7 ((𝑗 = 𝑚 = ) → (∀𝑧𝐵 (𝑥𝑚(𝑦𝑗𝑧)) = ((𝑥𝑚𝑦)𝑗(𝑥𝑚𝑧)) ↔ ∀𝑧𝐵 (𝑥 (𝑦 𝑧)) = ((𝑥 𝑦) (𝑥 𝑧))))
32312ralbidv 3128 . . . . . 6 ((𝑗 = 𝑚 = ) → (∀𝑥𝐵𝑦𝐵𝑧𝐵 (𝑥𝑚(𝑦𝑗𝑧)) = ((𝑥𝑚𝑦)𝑗(𝑥𝑚𝑧)) ↔ ∀𝑥𝐵𝑦𝐵𝑧𝐵 (𝑥 (𝑦 𝑧)) = ((𝑥 𝑦) (𝑥 𝑧))))
3321, 32sylan9bb 738 . . . . 5 ((𝑏 = 𝐵 ∧ (𝑗 = 𝑚 = )) → (∀𝑥𝑏𝑦𝑏𝑧𝑏 (𝑥𝑚(𝑦𝑗𝑧)) = ((𝑥𝑚𝑦)𝑗(𝑥𝑚𝑧)) ↔ ∀𝑥𝐵𝑦𝐵𝑧𝐵 (𝑥 (𝑦 𝑧)) = ((𝑥 𝑦) (𝑥 𝑧))))
34333impb 1108 . . . 4 ((𝑏 = 𝐵𝑗 = 𝑚 = ) → (∀𝑥𝑏𝑦𝑏𝑧𝑏 (𝑥𝑚(𝑦𝑗𝑧)) = ((𝑥𝑚𝑦)𝑗(𝑥𝑚𝑧)) ↔ ∀𝑥𝐵𝑦𝐵𝑧𝐵 (𝑥 (𝑦 𝑧)) = ((𝑥 𝑦) (𝑥 𝑧))))
3514, 16, 18, 34sbc3ie 3649 . . 3 ([𝐵 / 𝑏][ / 𝑗][ / 𝑚]𝑥𝑏𝑦𝑏𝑧𝑏 (𝑥𝑚(𝑦𝑗𝑧)) = ((𝑥𝑚𝑦)𝑗(𝑥𝑚𝑧)) ↔ ∀𝑥𝐵𝑦𝐵𝑧𝐵 (𝑥 (𝑦 𝑧)) = ((𝑥 𝑦) (𝑥 𝑧)))
3612, 35syl6bb 276 . 2 (𝑘 = 𝐾 → ([(Base‘𝑘) / 𝑏][(join‘𝑘) / 𝑗][(meet‘𝑘) / 𝑚]𝑥𝑏𝑦𝑏𝑧𝑏 (𝑥𝑚(𝑦𝑗𝑧)) = ((𝑥𝑚𝑦)𝑗(𝑥𝑚𝑧)) ↔ ∀𝑥𝐵𝑦𝐵𝑧𝐵 (𝑥 (𝑦 𝑧)) = ((𝑥 𝑦) (𝑥 𝑧))))
37 df-dlat 17414 . 2 DLat = {𝑘 ∈ Lat ∣ [(Base‘𝑘) / 𝑏][(join‘𝑘) / 𝑗][(meet‘𝑘) / 𝑚]𝑥𝑏𝑦𝑏𝑧𝑏 (𝑥𝑚(𝑦𝑗𝑧)) = ((𝑥𝑚𝑦)𝑗(𝑥𝑚𝑧))}
3836, 37elrab2 3508 1 (𝐾 ∈ DLat ↔ (𝐾 ∈ Lat ∧ ∀𝑥𝐵𝑦𝐵𝑧𝐵 (𝑥 (𝑦 𝑧)) = ((𝑥 𝑦) (𝑥 𝑧))))
 Colors of variables: wff setvar class Syntax hints:   ↔ wb 196   ∧ wa 383   = wceq 1632   ∈ wcel 2140  ∀wral 3051  Vcvv 3341  [wsbc 3577  ‘cfv 6050  (class class class)co 6815  Basecbs 16080  joincjn 17166  meetcmee 17167  Latclat 17267  DLatcdlat 17413 This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1871  ax-4 1886  ax-5 1989  ax-6 2055  ax-7 2091  ax-9 2149  ax-10 2169  ax-11 2184  ax-12 2197  ax-13 2392  ax-ext 2741  ax-nul 4942 This theorem depends on definitions:  df-bi 197  df-or 384  df-an 385  df-3an 1074  df-tru 1635  df-ex 1854  df-nf 1859  df-sb 2048  df-eu 2612  df-clab 2748  df-cleq 2754  df-clel 2757  df-nfc 2892  df-ral 3056  df-rex 3057  df-rab 3060  df-v 3343  df-sbc 3578  df-dif 3719  df-un 3721  df-in 3723  df-ss 3730  df-nul 4060  df-if 4232  df-sn 4323  df-pr 4325  df-op 4329  df-uni 4590  df-br 4806  df-iota 6013  df-fv 6058  df-ov 6818  df-dlat 17414 This theorem is referenced by:  dlatmjdi  17416  dlatl  17417  odudlatb  17418
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