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Description: Binary relation expressing the modular pair property. This version has a weaker constraint than mdbr . (Contributed by NM, 15-Jun-2004) (New usage is discouraged.)
| Ref | Expression | ||
|---|---|---|---|
| Assertion | mdbr2 | ⊢ ( ( 𝐴 ∈ Cℋ ∧ 𝐵 ∈ Cℋ ) → ( 𝐴 𝑀ℋ 𝐵 ↔ ∀ 𝑥 ∈ Cℋ ( 𝑥 ⊆ 𝐵 → ( ( 𝑥 ∨ℋ 𝐴 ) ∩ 𝐵 ) ⊆ ( 𝑥 ∨ℋ ( 𝐴 ∩ 𝐵 ) ) ) ) ) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | mdbr | ⊢ ( ( 𝐴 ∈ Cℋ ∧ 𝐵 ∈ Cℋ ) → ( 𝐴 𝑀ℋ 𝐵 ↔ ∀ 𝑥 ∈ Cℋ ( 𝑥 ⊆ 𝐵 → ( ( 𝑥 ∨ℋ 𝐴 ) ∩ 𝐵 ) = ( 𝑥 ∨ℋ ( 𝐴 ∩ 𝐵 ) ) ) ) ) | |
| 2 | chub1 | ⊢ ( ( 𝑥 ∈ Cℋ ∧ 𝐴 ∈ Cℋ ) → 𝑥 ⊆ ( 𝑥 ∨ℋ 𝐴 ) ) | |
| 3 | 2 | ancoms | ⊢ ( ( 𝐴 ∈ Cℋ ∧ 𝑥 ∈ Cℋ ) → 𝑥 ⊆ ( 𝑥 ∨ℋ 𝐴 ) ) |
| 4 | iba | ⊢ ( 𝑥 ⊆ 𝐵 → ( 𝑥 ⊆ ( 𝑥 ∨ℋ 𝐴 ) ↔ ( 𝑥 ⊆ ( 𝑥 ∨ℋ 𝐴 ) ∧ 𝑥 ⊆ 𝐵 ) ) ) | |
| 5 | ssin | ⊢ ( ( 𝑥 ⊆ ( 𝑥 ∨ℋ 𝐴 ) ∧ 𝑥 ⊆ 𝐵 ) ↔ 𝑥 ⊆ ( ( 𝑥 ∨ℋ 𝐴 ) ∩ 𝐵 ) ) | |
| 6 | 4 5 | bitrdi | ⊢ ( 𝑥 ⊆ 𝐵 → ( 𝑥 ⊆ ( 𝑥 ∨ℋ 𝐴 ) ↔ 𝑥 ⊆ ( ( 𝑥 ∨ℋ 𝐴 ) ∩ 𝐵 ) ) ) |
| 7 | 3 6 | syl5ibcom | ⊢ ( ( 𝐴 ∈ Cℋ ∧ 𝑥 ∈ Cℋ ) → ( 𝑥 ⊆ 𝐵 → 𝑥 ⊆ ( ( 𝑥 ∨ℋ 𝐴 ) ∩ 𝐵 ) ) ) |
| 8 | chub2 | ⊢ ( ( 𝐴 ∈ Cℋ ∧ 𝑥 ∈ Cℋ ) → 𝐴 ⊆ ( 𝑥 ∨ℋ 𝐴 ) ) | |
| 9 | 8 | ssrind | ⊢ ( ( 𝐴 ∈ Cℋ ∧ 𝑥 ∈ Cℋ ) → ( 𝐴 ∩ 𝐵 ) ⊆ ( ( 𝑥 ∨ℋ 𝐴 ) ∩ 𝐵 ) ) |
| 10 | 7 9 | jctird | ⊢ ( ( 𝐴 ∈ Cℋ ∧ 𝑥 ∈ Cℋ ) → ( 𝑥 ⊆ 𝐵 → ( 𝑥 ⊆ ( ( 𝑥 ∨ℋ 𝐴 ) ∩ 𝐵 ) ∧ ( 𝐴 ∩ 𝐵 ) ⊆ ( ( 𝑥 ∨ℋ 𝐴 ) ∩ 𝐵 ) ) ) ) |
| 11 | 10 | adantlr | ⊢ ( ( ( 𝐴 ∈ Cℋ ∧ 𝐵 ∈ Cℋ ) ∧ 𝑥 ∈ Cℋ ) → ( 𝑥 ⊆ 𝐵 → ( 𝑥 ⊆ ( ( 𝑥 ∨ℋ 𝐴 ) ∩ 𝐵 ) ∧ ( 𝐴 ∩ 𝐵 ) ⊆ ( ( 𝑥 ∨ℋ 𝐴 ) ∩ 𝐵 ) ) ) ) |
| 12 | simpr | ⊢ ( ( ( 𝐴 ∈ Cℋ ∧ 𝐵 ∈ Cℋ ) ∧ 𝑥 ∈ Cℋ ) → 𝑥 ∈ Cℋ ) | |
| 13 | chincl | ⊢ ( ( 𝐴 ∈ Cℋ ∧ 𝐵 ∈ Cℋ ) → ( 𝐴 ∩ 𝐵 ) ∈ Cℋ ) | |
| 14 | 13 | adantr | ⊢ ( ( ( 𝐴 ∈ Cℋ ∧ 𝐵 ∈ Cℋ ) ∧ 𝑥 ∈ Cℋ ) → ( 𝐴 ∩ 𝐵 ) ∈ Cℋ ) |
| 15 | chjcl | ⊢ ( ( 𝑥 ∈ Cℋ ∧ 𝐴 ∈ Cℋ ) → ( 𝑥 ∨ℋ 𝐴 ) ∈ Cℋ ) | |
| 16 | 15 | ancoms | ⊢ ( ( 𝐴 ∈ Cℋ ∧ 𝑥 ∈ Cℋ ) → ( 𝑥 ∨ℋ 𝐴 ) ∈ Cℋ ) |
| 17 | chincl | ⊢ ( ( ( 𝑥 ∨ℋ 𝐴 ) ∈ Cℋ ∧ 𝐵 ∈ Cℋ ) → ( ( 𝑥 ∨ℋ 𝐴 ) ∩ 𝐵 ) ∈ Cℋ ) | |
| 18 | 16 17 | sylan | ⊢ ( ( ( 𝐴 ∈ Cℋ ∧ 𝑥 ∈ Cℋ ) ∧ 𝐵 ∈ Cℋ ) → ( ( 𝑥 ∨ℋ 𝐴 ) ∩ 𝐵 ) ∈ Cℋ ) |
| 19 | 18 | an32s | ⊢ ( ( ( 𝐴 ∈ Cℋ ∧ 𝐵 ∈ Cℋ ) ∧ 𝑥 ∈ Cℋ ) → ( ( 𝑥 ∨ℋ 𝐴 ) ∩ 𝐵 ) ∈ Cℋ ) |
| 20 | chlub | ⊢ ( ( 𝑥 ∈ Cℋ ∧ ( 𝐴 ∩ 𝐵 ) ∈ Cℋ ∧ ( ( 𝑥 ∨ℋ 𝐴 ) ∩ 𝐵 ) ∈ Cℋ ) → ( ( 𝑥 ⊆ ( ( 𝑥 ∨ℋ 𝐴 ) ∩ 𝐵 ) ∧ ( 𝐴 ∩ 𝐵 ) ⊆ ( ( 𝑥 ∨ℋ 𝐴 ) ∩ 𝐵 ) ) ↔ ( 𝑥 ∨ℋ ( 𝐴 ∩ 𝐵 ) ) ⊆ ( ( 𝑥 ∨ℋ 𝐴 ) ∩ 𝐵 ) ) ) | |
| 21 | 12 14 19 20 | syl3anc | ⊢ ( ( ( 𝐴 ∈ Cℋ ∧ 𝐵 ∈ Cℋ ) ∧ 𝑥 ∈ Cℋ ) → ( ( 𝑥 ⊆ ( ( 𝑥 ∨ℋ 𝐴 ) ∩ 𝐵 ) ∧ ( 𝐴 ∩ 𝐵 ) ⊆ ( ( 𝑥 ∨ℋ 𝐴 ) ∩ 𝐵 ) ) ↔ ( 𝑥 ∨ℋ ( 𝐴 ∩ 𝐵 ) ) ⊆ ( ( 𝑥 ∨ℋ 𝐴 ) ∩ 𝐵 ) ) ) |
| 22 | 11 21 | sylibd | ⊢ ( ( ( 𝐴 ∈ Cℋ ∧ 𝐵 ∈ Cℋ ) ∧ 𝑥 ∈ Cℋ ) → ( 𝑥 ⊆ 𝐵 → ( 𝑥 ∨ℋ ( 𝐴 ∩ 𝐵 ) ) ⊆ ( ( 𝑥 ∨ℋ 𝐴 ) ∩ 𝐵 ) ) ) |
| 23 | eqss | ⊢ ( ( ( 𝑥 ∨ℋ 𝐴 ) ∩ 𝐵 ) = ( 𝑥 ∨ℋ ( 𝐴 ∩ 𝐵 ) ) ↔ ( ( ( 𝑥 ∨ℋ 𝐴 ) ∩ 𝐵 ) ⊆ ( 𝑥 ∨ℋ ( 𝐴 ∩ 𝐵 ) ) ∧ ( 𝑥 ∨ℋ ( 𝐴 ∩ 𝐵 ) ) ⊆ ( ( 𝑥 ∨ℋ 𝐴 ) ∩ 𝐵 ) ) ) | |
| 24 | 23 | rbaib | ⊢ ( ( 𝑥 ∨ℋ ( 𝐴 ∩ 𝐵 ) ) ⊆ ( ( 𝑥 ∨ℋ 𝐴 ) ∩ 𝐵 ) → ( ( ( 𝑥 ∨ℋ 𝐴 ) ∩ 𝐵 ) = ( 𝑥 ∨ℋ ( 𝐴 ∩ 𝐵 ) ) ↔ ( ( 𝑥 ∨ℋ 𝐴 ) ∩ 𝐵 ) ⊆ ( 𝑥 ∨ℋ ( 𝐴 ∩ 𝐵 ) ) ) ) |
| 25 | 22 24 | syl6 | ⊢ ( ( ( 𝐴 ∈ Cℋ ∧ 𝐵 ∈ Cℋ ) ∧ 𝑥 ∈ Cℋ ) → ( 𝑥 ⊆ 𝐵 → ( ( ( 𝑥 ∨ℋ 𝐴 ) ∩ 𝐵 ) = ( 𝑥 ∨ℋ ( 𝐴 ∩ 𝐵 ) ) ↔ ( ( 𝑥 ∨ℋ 𝐴 ) ∩ 𝐵 ) ⊆ ( 𝑥 ∨ℋ ( 𝐴 ∩ 𝐵 ) ) ) ) ) |
| 26 | 25 | pm5.74d | ⊢ ( ( ( 𝐴 ∈ Cℋ ∧ 𝐵 ∈ Cℋ ) ∧ 𝑥 ∈ Cℋ ) → ( ( 𝑥 ⊆ 𝐵 → ( ( 𝑥 ∨ℋ 𝐴 ) ∩ 𝐵 ) = ( 𝑥 ∨ℋ ( 𝐴 ∩ 𝐵 ) ) ) ↔ ( 𝑥 ⊆ 𝐵 → ( ( 𝑥 ∨ℋ 𝐴 ) ∩ 𝐵 ) ⊆ ( 𝑥 ∨ℋ ( 𝐴 ∩ 𝐵 ) ) ) ) ) |
| 27 | 26 | ralbidva | ⊢ ( ( 𝐴 ∈ Cℋ ∧ 𝐵 ∈ Cℋ ) → ( ∀ 𝑥 ∈ Cℋ ( 𝑥 ⊆ 𝐵 → ( ( 𝑥 ∨ℋ 𝐴 ) ∩ 𝐵 ) = ( 𝑥 ∨ℋ ( 𝐴 ∩ 𝐵 ) ) ) ↔ ∀ 𝑥 ∈ Cℋ ( 𝑥 ⊆ 𝐵 → ( ( 𝑥 ∨ℋ 𝐴 ) ∩ 𝐵 ) ⊆ ( 𝑥 ∨ℋ ( 𝐴 ∩ 𝐵 ) ) ) ) ) |
| 28 | 1 27 | bitrd | ⊢ ( ( 𝐴 ∈ Cℋ ∧ 𝐵 ∈ Cℋ ) → ( 𝐴 𝑀ℋ 𝐵 ↔ ∀ 𝑥 ∈ Cℋ ( 𝑥 ⊆ 𝐵 → ( ( 𝑥 ∨ℋ 𝐴 ) ∩ 𝐵 ) ⊆ ( 𝑥 ∨ℋ ( 𝐴 ∩ 𝐵 ) ) ) ) ) |