Definition df-dmd 10118

Description: Define the dual modular pair relation (on the Hilbert lattice). Definition 1.1 of [MaedaMaeda] p. 1, who use the notation (x,y)M* for "the ordered pair <x,y> is a dual modular pair." See dmdbrt 10136 for membership relation.

Assertion

Ref	Expression
df-dmd	⊢ Mℋ* = {⟨x, y⟩∣((x ∈ Cℋ ⋀ y ∈ Cℋ ) ⋀ ∀z ∈ Cℋ (y ⊆ z → ((z ∩ x) ∨ℋ y) = (z ∩ (x ∨ℋ y))))}

Distinct variable group:   x,y,z

Detailed syntax breakdown of Definition df-dmd

Step	Hyp	Ref	Expression
1		cdmd 8775	. 2 class Mℋ*
2		vx	. . . . . . 7 set x
3	2	cv 952	. . . . . 6 class x
4		cch 8737	. . . . . 6 class Cℋ
5	3, 4	wcel 955	. . . . 5 wff x ∈ Cℋ
6		vy	. . . . . . 7 set y
7	6	cv 952	. . . . . 6 class y
8	7, 4	wcel 955	. . . . 5 wff y ∈ Cℋ
9	5, 8	wa 223	. . . 4 wff (x ∈ Cℋ ⋀ y ∈ Cℋ )
10		vz	. . . . . . . 8 set z
11	10	cv 952	. . . . . . 7 class z
12	7, 11	wss 2037	. . . . . 6 wff y ⊆ z
13	11, 3	cin 2036	. . . . . . . 8 class (z ∩ x)
14		chj 8741	. . . . . . . 8 class ∨ℋ
15	13, 7, 14	co 3948	. . . . . . 7 class ((z ∩ x) ∨ℋ y)
16	3, 7, 14	co 3948	. . . . . . . 8 class (x ∨ℋ y)
17	11, 16	cin 2036	. . . . . . 7 class (z ∩ (x ∨ℋ y))
18	15, 17	wceq 953	. . . . . 6 wff ((z ∩ x) ∨ℋ y) = (z ∩ (x ∨ℋ y))
19	12, 18	wi 3	. . . . 5 wff (y ⊆ z → ((z ∩ x) ∨ℋ y) = (z ∩ (x ∨ℋ y)))
20	19, 10, 4	wral 1637	. . . 4 wff ∀z ∈ Cℋ (y ⊆ z → ((z ∩ x) ∨ℋ y) = (z ∩ (x ∨ℋ y)))
21	9, 20	wa 223	. . 3 wff ((x ∈ Cℋ ⋀ y ∈ Cℋ ) ⋀ ∀z ∈ Cℋ (y ⊆ z → ((z ∩ x) ∨ℋ y) = (z ∩ (x ∨ℋ y))))
22	21, 2, 6	copab 2656	. 2 class {⟨x, y⟩∣((x ∈ Cℋ ⋀ y ∈ Cℋ ) ⋀ ∀z ∈ Cℋ (y ⊆ z → ((z ∩ x) ∨ℋ y) = (z ∩ (x ∨ℋ y))))}
23	1, 22	wceq 953	1 wff Mℋ* = {⟨x, y⟩∣((x ∈ Cℋ ⋀ y ∈ Cℋ ) ⋀ ∀z ∈ Cℋ (y ⊆ z → ((z ∩ x) ∨ℋ y) = (z ∩ (x ∨ℋ y))))}

This definition is referenced by:  dmdbrt 10136

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