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Description: Binary relation expressing the dual modular pair property. This version has a weaker constraint than dmdbr . (Contributed by NM, 30-Jun-2004) (New usage is discouraged.)
| Ref | Expression | ||
|---|---|---|---|
| Assertion | dmdbr2 | ⊢ ( ( 𝐴 ∈ Cℋ ∧ 𝐵 ∈ Cℋ ) → ( 𝐴 𝑀ℋ* 𝐵 ↔ ∀ 𝑥 ∈ Cℋ ( 𝐵 ⊆ 𝑥 → ( 𝑥 ∩ ( 𝐴 ∨ℋ 𝐵 ) ) ⊆ ( ( 𝑥 ∩ 𝐴 ) ∨ℋ 𝐵 ) ) ) ) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | dmdbr | ⊢ ( ( 𝐴 ∈ Cℋ ∧ 𝐵 ∈ Cℋ ) → ( 𝐴 𝑀ℋ* 𝐵 ↔ ∀ 𝑥 ∈ Cℋ ( 𝐵 ⊆ 𝑥 → ( ( 𝑥 ∩ 𝐴 ) ∨ℋ 𝐵 ) = ( 𝑥 ∩ ( 𝐴 ∨ℋ 𝐵 ) ) ) ) ) | |
| 2 | chincl | ⊢ ( ( 𝑥 ∈ Cℋ ∧ 𝐴 ∈ Cℋ ) → ( 𝑥 ∩ 𝐴 ) ∈ Cℋ ) | |
| 3 | 2 | ancoms | ⊢ ( ( 𝐴 ∈ Cℋ ∧ 𝑥 ∈ Cℋ ) → ( 𝑥 ∩ 𝐴 ) ∈ Cℋ ) |
| 4 | 3 | adantlr | ⊢ ( ( ( 𝐴 ∈ Cℋ ∧ 𝐵 ∈ Cℋ ) ∧ 𝑥 ∈ Cℋ ) → ( 𝑥 ∩ 𝐴 ) ∈ Cℋ ) |
| 5 | simplr | ⊢ ( ( ( 𝐴 ∈ Cℋ ∧ 𝐵 ∈ Cℋ ) ∧ 𝑥 ∈ Cℋ ) → 𝐵 ∈ Cℋ ) | |
| 6 | simpr | ⊢ ( ( ( 𝐴 ∈ Cℋ ∧ 𝐵 ∈ Cℋ ) ∧ 𝑥 ∈ Cℋ ) → 𝑥 ∈ Cℋ ) | |
| 7 | inss1 | ⊢ ( 𝑥 ∩ 𝐴 ) ⊆ 𝑥 | |
| 8 | chlub | ⊢ ( ( ( 𝑥 ∩ 𝐴 ) ∈ Cℋ ∧ 𝐵 ∈ Cℋ ∧ 𝑥 ∈ Cℋ ) → ( ( ( 𝑥 ∩ 𝐴 ) ⊆ 𝑥 ∧ 𝐵 ⊆ 𝑥 ) ↔ ( ( 𝑥 ∩ 𝐴 ) ∨ℋ 𝐵 ) ⊆ 𝑥 ) ) | |
| 9 | 8 | biimpd | ⊢ ( ( ( 𝑥 ∩ 𝐴 ) ∈ Cℋ ∧ 𝐵 ∈ Cℋ ∧ 𝑥 ∈ Cℋ ) → ( ( ( 𝑥 ∩ 𝐴 ) ⊆ 𝑥 ∧ 𝐵 ⊆ 𝑥 ) → ( ( 𝑥 ∩ 𝐴 ) ∨ℋ 𝐵 ) ⊆ 𝑥 ) ) |
| 10 | 7 9 | mpani | ⊢ ( ( ( 𝑥 ∩ 𝐴 ) ∈ Cℋ ∧ 𝐵 ∈ Cℋ ∧ 𝑥 ∈ Cℋ ) → ( 𝐵 ⊆ 𝑥 → ( ( 𝑥 ∩ 𝐴 ) ∨ℋ 𝐵 ) ⊆ 𝑥 ) ) |
| 11 | 4 5 6 10 | syl3anc | ⊢ ( ( ( 𝐴 ∈ Cℋ ∧ 𝐵 ∈ Cℋ ) ∧ 𝑥 ∈ Cℋ ) → ( 𝐵 ⊆ 𝑥 → ( ( 𝑥 ∩ 𝐴 ) ∨ℋ 𝐵 ) ⊆ 𝑥 ) ) |
| 12 | simpll | ⊢ ( ( ( 𝐴 ∈ Cℋ ∧ 𝐵 ∈ Cℋ ) ∧ 𝑥 ∈ Cℋ ) → 𝐴 ∈ Cℋ ) | |
| 13 | inss2 | ⊢ ( 𝑥 ∩ 𝐴 ) ⊆ 𝐴 | |
| 14 | chlej1 | ⊢ ( ( ( ( 𝑥 ∩ 𝐴 ) ∈ Cℋ ∧ 𝐴 ∈ Cℋ ∧ 𝐵 ∈ Cℋ ) ∧ ( 𝑥 ∩ 𝐴 ) ⊆ 𝐴 ) → ( ( 𝑥 ∩ 𝐴 ) ∨ℋ 𝐵 ) ⊆ ( 𝐴 ∨ℋ 𝐵 ) ) | |
| 15 | 13 14 | mpan2 | ⊢ ( ( ( 𝑥 ∩ 𝐴 ) ∈ Cℋ ∧ 𝐴 ∈ Cℋ ∧ 𝐵 ∈ Cℋ ) → ( ( 𝑥 ∩ 𝐴 ) ∨ℋ 𝐵 ) ⊆ ( 𝐴 ∨ℋ 𝐵 ) ) |
| 16 | 4 12 5 15 | syl3anc | ⊢ ( ( ( 𝐴 ∈ Cℋ ∧ 𝐵 ∈ Cℋ ) ∧ 𝑥 ∈ Cℋ ) → ( ( 𝑥 ∩ 𝐴 ) ∨ℋ 𝐵 ) ⊆ ( 𝐴 ∨ℋ 𝐵 ) ) |
| 17 | 11 16 | jctird | ⊢ ( ( ( 𝐴 ∈ Cℋ ∧ 𝐵 ∈ Cℋ ) ∧ 𝑥 ∈ Cℋ ) → ( 𝐵 ⊆ 𝑥 → ( ( ( 𝑥 ∩ 𝐴 ) ∨ℋ 𝐵 ) ⊆ 𝑥 ∧ ( ( 𝑥 ∩ 𝐴 ) ∨ℋ 𝐵 ) ⊆ ( 𝐴 ∨ℋ 𝐵 ) ) ) ) |
| 18 | ssin | ⊢ ( ( ( ( 𝑥 ∩ 𝐴 ) ∨ℋ 𝐵 ) ⊆ 𝑥 ∧ ( ( 𝑥 ∩ 𝐴 ) ∨ℋ 𝐵 ) ⊆ ( 𝐴 ∨ℋ 𝐵 ) ) ↔ ( ( 𝑥 ∩ 𝐴 ) ∨ℋ 𝐵 ) ⊆ ( 𝑥 ∩ ( 𝐴 ∨ℋ 𝐵 ) ) ) | |
| 19 | 17 18 | imbitrdi | ⊢ ( ( ( 𝐴 ∈ Cℋ ∧ 𝐵 ∈ Cℋ ) ∧ 𝑥 ∈ Cℋ ) → ( 𝐵 ⊆ 𝑥 → ( ( 𝑥 ∩ 𝐴 ) ∨ℋ 𝐵 ) ⊆ ( 𝑥 ∩ ( 𝐴 ∨ℋ 𝐵 ) ) ) ) |
| 20 | eqss | ⊢ ( ( ( 𝑥 ∩ 𝐴 ) ∨ℋ 𝐵 ) = ( 𝑥 ∩ ( 𝐴 ∨ℋ 𝐵 ) ) ↔ ( ( ( 𝑥 ∩ 𝐴 ) ∨ℋ 𝐵 ) ⊆ ( 𝑥 ∩ ( 𝐴 ∨ℋ 𝐵 ) ) ∧ ( 𝑥 ∩ ( 𝐴 ∨ℋ 𝐵 ) ) ⊆ ( ( 𝑥 ∩ 𝐴 ) ∨ℋ 𝐵 ) ) ) | |
| 21 | 20 | baib | ⊢ ( ( ( 𝑥 ∩ 𝐴 ) ∨ℋ 𝐵 ) ⊆ ( 𝑥 ∩ ( 𝐴 ∨ℋ 𝐵 ) ) → ( ( ( 𝑥 ∩ 𝐴 ) ∨ℋ 𝐵 ) = ( 𝑥 ∩ ( 𝐴 ∨ℋ 𝐵 ) ) ↔ ( 𝑥 ∩ ( 𝐴 ∨ℋ 𝐵 ) ) ⊆ ( ( 𝑥 ∩ 𝐴 ) ∨ℋ 𝐵 ) ) ) |
| 22 | 19 21 | syl6 | ⊢ ( ( ( 𝐴 ∈ Cℋ ∧ 𝐵 ∈ Cℋ ) ∧ 𝑥 ∈ Cℋ ) → ( 𝐵 ⊆ 𝑥 → ( ( ( 𝑥 ∩ 𝐴 ) ∨ℋ 𝐵 ) = ( 𝑥 ∩ ( 𝐴 ∨ℋ 𝐵 ) ) ↔ ( 𝑥 ∩ ( 𝐴 ∨ℋ 𝐵 ) ) ⊆ ( ( 𝑥 ∩ 𝐴 ) ∨ℋ 𝐵 ) ) ) ) |
| 23 | 22 | pm5.74d | ⊢ ( ( ( 𝐴 ∈ Cℋ ∧ 𝐵 ∈ Cℋ ) ∧ 𝑥 ∈ Cℋ ) → ( ( 𝐵 ⊆ 𝑥 → ( ( 𝑥 ∩ 𝐴 ) ∨ℋ 𝐵 ) = ( 𝑥 ∩ ( 𝐴 ∨ℋ 𝐵 ) ) ) ↔ ( 𝐵 ⊆ 𝑥 → ( 𝑥 ∩ ( 𝐴 ∨ℋ 𝐵 ) ) ⊆ ( ( 𝑥 ∩ 𝐴 ) ∨ℋ 𝐵 ) ) ) ) |
| 24 | 23 | ralbidva | ⊢ ( ( 𝐴 ∈ Cℋ ∧ 𝐵 ∈ Cℋ ) → ( ∀ 𝑥 ∈ Cℋ ( 𝐵 ⊆ 𝑥 → ( ( 𝑥 ∩ 𝐴 ) ∨ℋ 𝐵 ) = ( 𝑥 ∩ ( 𝐴 ∨ℋ 𝐵 ) ) ) ↔ ∀ 𝑥 ∈ Cℋ ( 𝐵 ⊆ 𝑥 → ( 𝑥 ∩ ( 𝐴 ∨ℋ 𝐵 ) ) ⊆ ( ( 𝑥 ∩ 𝐴 ) ∨ℋ 𝐵 ) ) ) ) |
| 25 | 1 24 | bitrd | ⊢ ( ( 𝐴 ∈ Cℋ ∧ 𝐵 ∈ Cℋ ) → ( 𝐴 𝑀ℋ* 𝐵 ↔ ∀ 𝑥 ∈ Cℋ ( 𝐵 ⊆ 𝑥 → ( 𝑥 ∩ ( 𝐴 ∨ℋ 𝐵 ) ) ⊆ ( ( 𝑥 ∩ 𝐴 ) ∨ℋ 𝐵 ) ) ) ) |