Theorem isdlat 18567

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 ∧ ∀𝑥 ∈ 𝐵 ∀𝑦 ∈ 𝐵 ∀𝑧 ∈ 𝐵 (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.

Step	Hyp	Ref	Expression
1		fveq2 6906	. . . . 5 ⊢ (𝑘 = 𝐾 → (Base‘𝑘) = (Base‘𝐾))
2		isdlat.b	. . . . 5 ⊢ 𝐵 = (Base‘𝐾)
3	1, 2	eqtr4di 2795	. . . 4 ⊢ (𝑘 = 𝐾 → (Base‘𝑘) = 𝐵)
4		fveq2 6906	. . . . . 6 ⊢ (𝑘 = 𝐾 → (join‘𝑘) = (join‘𝐾))
5		isdlat.j	. . . . . 6 ⊢ ∨ = (join‘𝐾)
6	4, 5	eqtr4di 2795	. . . . 5 ⊢ (𝑘 = 𝐾 → (join‘𝑘) = ∨ )
7		fveq2 6906	. . . . . . 7 ⊢ (𝑘 = 𝐾 → (meet‘𝑘) = (meet‘𝐾))
8		isdlat.m	. . . . . . 7 ⊢ ∧ = (meet‘𝐾)
9	7, 8	eqtr4di 2795	. . . . . 6 ⊢ (𝑘 = 𝐾 → (meet‘𝑘) = ∧ )
10	9	sbceq1d 3793	. . . . 5 ⊢ (𝑘 = 𝐾 → ([(meet‘𝑘) / 𝑚]∀𝑥 ∈ 𝑏 ∀𝑦 ∈ 𝑏 ∀𝑧 ∈ 𝑏 (𝑥𝑚(𝑦𝑗𝑧)) = ((𝑥𝑚𝑦)𝑗(𝑥𝑚𝑧)) ↔ [ ∧ / 𝑚]∀𝑥 ∈ 𝑏 ∀𝑦 ∈ 𝑏 ∀𝑧 ∈ 𝑏 (𝑥𝑚(𝑦𝑗𝑧)) = ((𝑥𝑚𝑦)𝑗(𝑥𝑚𝑧))))
11	6, 10	sbceqbid 3795	. . . 4 ⊢ (𝑘 = 𝐾 → ([(join‘𝑘) / 𝑗][(meet‘𝑘) / 𝑚]∀𝑥 ∈ 𝑏 ∀𝑦 ∈ 𝑏 ∀𝑧 ∈ 𝑏 (𝑥𝑚(𝑦𝑗𝑧)) = ((𝑥𝑚𝑦)𝑗(𝑥𝑚𝑧)) ↔ [ ∨ / 𝑗][ ∧ / 𝑚]∀𝑥 ∈ 𝑏 ∀𝑦 ∈ 𝑏 ∀𝑧 ∈ 𝑏 (𝑥𝑚(𝑦𝑗𝑧)) = ((𝑥𝑚𝑦)𝑗(𝑥𝑚𝑧))))
12	3, 11	sbceqbid 3795	. . 3 ⊢ (𝑘 = 𝐾 → ([(Base‘𝑘) / 𝑏][(join‘𝑘) / 𝑗][(meet‘𝑘) / 𝑚]∀𝑥 ∈ 𝑏 ∀𝑦 ∈ 𝑏 ∀𝑧 ∈ 𝑏 (𝑥𝑚(𝑦𝑗𝑧)) = ((𝑥𝑚𝑦)𝑗(𝑥𝑚𝑧)) ↔ [𝐵 / 𝑏][ ∨ / 𝑗][ ∧ / 𝑚]∀𝑥 ∈ 𝑏 ∀𝑦 ∈ 𝑏 ∀𝑧 ∈ 𝑏 (𝑥𝑚(𝑦𝑗𝑧)) = ((𝑥𝑚𝑦)𝑗(𝑥𝑚𝑧))))
13	2	fvexi 6920	. . . 4 ⊢ 𝐵 ∈ V
14	5	fvexi 6920	. . . 4 ⊢ ∨ ∈ V
15	8	fvexi 6920	. . . 4 ⊢ ∧ ∈ V
16		raleq 3323	. . . . . . . 8 ⊢ (𝑏 = 𝐵 → (∀𝑧 ∈ 𝑏 (𝑥𝑚(𝑦𝑗𝑧)) = ((𝑥𝑚𝑦)𝑗(𝑥𝑚𝑧)) ↔ ∀𝑧 ∈ 𝐵 (𝑥𝑚(𝑦𝑗𝑧)) = ((𝑥𝑚𝑦)𝑗(𝑥𝑚𝑧))))
17	16	raleqbi1dv 3338	. . . . . . 7 ⊢ (𝑏 = 𝐵 → (∀𝑦 ∈ 𝑏 ∀𝑧 ∈ 𝑏 (𝑥𝑚(𝑦𝑗𝑧)) = ((𝑥𝑚𝑦)𝑗(𝑥𝑚𝑧)) ↔ ∀𝑦 ∈ 𝐵 ∀𝑧 ∈ 𝐵 (𝑥𝑚(𝑦𝑗𝑧)) = ((𝑥𝑚𝑦)𝑗(𝑥𝑚𝑧))))
18	17	raleqbi1dv 3338	. . . . . 6 ⊢ (𝑏 = 𝐵 → (∀𝑥 ∈ 𝑏 ∀𝑦 ∈ 𝑏 ∀𝑧 ∈ 𝑏 (𝑥𝑚(𝑦𝑗𝑧)) = ((𝑥𝑚𝑦)𝑗(𝑥𝑚𝑧)) ↔ ∀𝑥 ∈ 𝐵 ∀𝑦 ∈ 𝐵 ∀𝑧 ∈ 𝐵 (𝑥𝑚(𝑦𝑗𝑧)) = ((𝑥𝑚𝑦)𝑗(𝑥𝑚𝑧))))
19		simpr 484	. . . . . . . . . 10 ⊢ ((𝑗 = ∨ ∧ 𝑚 = ∧ ) → 𝑚 = ∧ )
20		eqidd 2738	. . . . . . . . . 10 ⊢ ((𝑗 = ∨ ∧ 𝑚 = ∧ ) → 𝑥 = 𝑥)
21		simpl 482	. . . . . . . . . . 11 ⊢ ((𝑗 = ∨ ∧ 𝑚 = ∧ ) → 𝑗 = ∨ )
22	21	oveqd 7448	. . . . . . . . . 10 ⊢ ((𝑗 = ∨ ∧ 𝑚 = ∧ ) → (𝑦𝑗𝑧) = (𝑦 ∨ 𝑧))
23	19, 20, 22	oveq123d 7452	. . . . . . . . 9 ⊢ ((𝑗 = ∨ ∧ 𝑚 = ∧ ) → (𝑥𝑚(𝑦𝑗𝑧)) = (𝑥 ∧ (𝑦 ∨ 𝑧)))
24	19	oveqd 7448	. . . . . . . . . 10 ⊢ ((𝑗 = ∨ ∧ 𝑚 = ∧ ) → (𝑥𝑚𝑦) = (𝑥 ∧ 𝑦))
25	19	oveqd 7448	. . . . . . . . . 10 ⊢ ((𝑗 = ∨ ∧ 𝑚 = ∧ ) → (𝑥𝑚𝑧) = (𝑥 ∧ 𝑧))
26	21, 24, 25	oveq123d 7452	. . . . . . . . 9 ⊢ ((𝑗 = ∨ ∧ 𝑚 = ∧ ) → ((𝑥𝑚𝑦)𝑗(𝑥𝑚𝑧)) = ((𝑥 ∧ 𝑦) ∨ (𝑥 ∧ 𝑧)))
27	23, 26	eqeq12d 2753	. . . . . . . 8 ⊢ ((𝑗 = ∨ ∧ 𝑚 = ∧ ) → ((𝑥𝑚(𝑦𝑗𝑧)) = ((𝑥𝑚𝑦)𝑗(𝑥𝑚𝑧)) ↔ (𝑥 ∧ (𝑦 ∨ 𝑧)) = ((𝑥 ∧ 𝑦) ∨ (𝑥 ∧ 𝑧))))
28	27	ralbidv 3178	. . . . . . 7 ⊢ ((𝑗 = ∨ ∧ 𝑚 = ∧ ) → (∀𝑧 ∈ 𝐵 (𝑥𝑚(𝑦𝑗𝑧)) = ((𝑥𝑚𝑦)𝑗(𝑥𝑚𝑧)) ↔ ∀𝑧 ∈ 𝐵 (𝑥 ∧ (𝑦 ∨ 𝑧)) = ((𝑥 ∧ 𝑦) ∨ (𝑥 ∧ 𝑧))))
29	28	2ralbidv 3221	. . . . . 6 ⊢ ((𝑗 = ∨ ∧ 𝑚 = ∧ ) → (∀𝑥 ∈ 𝐵 ∀𝑦 ∈ 𝐵 ∀𝑧 ∈ 𝐵 (𝑥𝑚(𝑦𝑗𝑧)) = ((𝑥𝑚𝑦)𝑗(𝑥𝑚𝑧)) ↔ ∀𝑥 ∈ 𝐵 ∀𝑦 ∈ 𝐵 ∀𝑧 ∈ 𝐵 (𝑥 ∧ (𝑦 ∨ 𝑧)) = ((𝑥 ∧ 𝑦) ∨ (𝑥 ∧ 𝑧))))
30	18, 29	sylan9bb 509	. . . . 5 ⊢ ((𝑏 = 𝐵 ∧ (𝑗 = ∨ ∧ 𝑚 = ∧ )) → (∀𝑥 ∈ 𝑏 ∀𝑦 ∈ 𝑏 ∀𝑧 ∈ 𝑏 (𝑥𝑚(𝑦𝑗𝑧)) = ((𝑥𝑚𝑦)𝑗(𝑥𝑚𝑧)) ↔ ∀𝑥 ∈ 𝐵 ∀𝑦 ∈ 𝐵 ∀𝑧 ∈ 𝐵 (𝑥 ∧ (𝑦 ∨ 𝑧)) = ((𝑥 ∧ 𝑦) ∨ (𝑥 ∧ 𝑧))))
31	30	3impb 1115	. . . 4 ⊢ ((𝑏 = 𝐵 ∧ 𝑗 = ∨ ∧ 𝑚 = ∧ ) → (∀𝑥 ∈ 𝑏 ∀𝑦 ∈ 𝑏 ∀𝑧 ∈ 𝑏 (𝑥𝑚(𝑦𝑗𝑧)) = ((𝑥𝑚𝑦)𝑗(𝑥𝑚𝑧)) ↔ ∀𝑥 ∈ 𝐵 ∀𝑦 ∈ 𝐵 ∀𝑧 ∈ 𝐵 (𝑥 ∧ (𝑦 ∨ 𝑧)) = ((𝑥 ∧ 𝑦) ∨ (𝑥 ∧ 𝑧))))
32	13, 14, 15, 31	sbc3ie 3868	. . 3 ⊢ ([𝐵 / 𝑏][ ∨ / 𝑗][ ∧ / 𝑚]∀𝑥 ∈ 𝑏 ∀𝑦 ∈ 𝑏 ∀𝑧 ∈ 𝑏 (𝑥𝑚(𝑦𝑗𝑧)) = ((𝑥𝑚𝑦)𝑗(𝑥𝑚𝑧)) ↔ ∀𝑥 ∈ 𝐵 ∀𝑦 ∈ 𝐵 ∀𝑧 ∈ 𝐵 (𝑥 ∧ (𝑦 ∨ 𝑧)) = ((𝑥 ∧ 𝑦) ∨ (𝑥 ∧ 𝑧)))
33	12, 32	bitrdi 287	. 2 ⊢ (𝑘 = 𝐾 → ([(Base‘𝑘) / 𝑏][(join‘𝑘) / 𝑗][(meet‘𝑘) / 𝑚]∀𝑥 ∈ 𝑏 ∀𝑦 ∈ 𝑏 ∀𝑧 ∈ 𝑏 (𝑥𝑚(𝑦𝑗𝑧)) = ((𝑥𝑚𝑦)𝑗(𝑥𝑚𝑧)) ↔ ∀𝑥 ∈ 𝐵 ∀𝑦 ∈ 𝐵 ∀𝑧 ∈ 𝐵 (𝑥 ∧ (𝑦 ∨ 𝑧)) = ((𝑥 ∧ 𝑦) ∨ (𝑥 ∧ 𝑧))))
34		df-dlat 18566	. 2 ⊢ DLat = {𝑘 ∈ Lat ∣ [(Base‘𝑘) / 𝑏][(join‘𝑘) / 𝑗][(meet‘𝑘) / 𝑚]∀𝑥 ∈ 𝑏 ∀𝑦 ∈ 𝑏 ∀𝑧 ∈ 𝑏 (𝑥𝑚(𝑦𝑗𝑧)) = ((𝑥𝑚𝑦)𝑗(𝑥𝑚𝑧))}
35	33, 34	elrab2 3695	1 ⊢ (𝐾 ∈ DLat ↔ (𝐾 ∈ Lat ∧ ∀𝑥 ∈ 𝐵 ∀𝑦 ∈ 𝐵 ∀𝑧 ∈ 𝐵 (𝑥 ∧ (𝑦 ∨ 𝑧)) = ((𝑥 ∧ 𝑦) ∨ (𝑥 ∧ 𝑧))))

Syntax hints:   ↔ wb 206   ∧ wa 395   = wceq 1540   ∈ wcel 2108  ∀wral 3061  [wsbc 3788  ‘cfv 6561  (class class class)co 7431  Basecbs 17247  joincjn 18357  meetcmee 18358  Latclat 18476  DLatcdlat 18565

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1795  ax-4 1809  ax-5 1910  ax-6 1967  ax-7 2007  ax-8 2110  ax-9 2118  ax-ext 2708  ax-nul 5306

This theorem depends on definitions:  df-bi 207  df-an 396  df-or 849  df-3an 1089  df-tru 1543  df-fal 1553  df-ex 1780  df-sb 2065  df-clab 2715  df-cleq 2729  df-clel 2816  df-ne 2941  df-ral 3062  df-rex 3071  df-rab 3437  df-v 3482  df-sbc 3789  df-dif 3954  df-un 3956  df-ss 3968  df-nul 4334  df-if 4526  df-sn 4627  df-pr 4629  df-op 4633  df-uni 4908  df-br 5144  df-iota 6514  df-fv 6569  df-ov 7434  df-dlat 18566

This theorem is referenced by:  dlatmjdi  18568  dlatl  18569  odudlatb  18570  topdlat  48893