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Description: Lemma for cvexchi . (Contributed by NM, 10-Jun-2004) (New usage is discouraged.)
| Ref | Expression | ||
|---|---|---|---|
| Hypotheses | chpssat.1 | ⊢ 𝐴 ∈ Cℋ | |
| chpssat.2 | ⊢ 𝐵 ∈ Cℋ | ||
| Assertion | cvexchlem | ⊢ ( ( 𝐴 ∩ 𝐵 ) ⋖ℋ 𝐵 → 𝐴 ⋖ℋ ( 𝐴 ∨ℋ 𝐵 ) ) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | chpssat.1 | ⊢ 𝐴 ∈ Cℋ | |
| 2 | chpssat.2 | ⊢ 𝐵 ∈ Cℋ | |
| 3 | 1 2 | chincli | ⊢ ( 𝐴 ∩ 𝐵 ) ∈ Cℋ |
| 4 | cvpss | ⊢ ( ( ( 𝐴 ∩ 𝐵 ) ∈ Cℋ ∧ 𝐵 ∈ Cℋ ) → ( ( 𝐴 ∩ 𝐵 ) ⋖ℋ 𝐵 → ( 𝐴 ∩ 𝐵 ) ⊊ 𝐵 ) ) | |
| 5 | 3 2 4 | mp2an | ⊢ ( ( 𝐴 ∩ 𝐵 ) ⋖ℋ 𝐵 → ( 𝐴 ∩ 𝐵 ) ⊊ 𝐵 ) |
| 6 | 3 2 | chpssati | ⊢ ( ( 𝐴 ∩ 𝐵 ) ⊊ 𝐵 → ∃ 𝑥 ∈ HAtoms ( 𝑥 ⊆ 𝐵 ∧ ¬ 𝑥 ⊆ ( 𝐴 ∩ 𝐵 ) ) ) |
| 7 | 5 6 | syl | ⊢ ( ( 𝐴 ∩ 𝐵 ) ⋖ℋ 𝐵 → ∃ 𝑥 ∈ HAtoms ( 𝑥 ⊆ 𝐵 ∧ ¬ 𝑥 ⊆ ( 𝐴 ∩ 𝐵 ) ) ) |
| 8 | ssin | ⊢ ( ( 𝑥 ⊆ 𝐴 ∧ 𝑥 ⊆ 𝐵 ) ↔ 𝑥 ⊆ ( 𝐴 ∩ 𝐵 ) ) | |
| 9 | ancom | ⊢ ( ( 𝑥 ⊆ 𝐴 ∧ 𝑥 ⊆ 𝐵 ) ↔ ( 𝑥 ⊆ 𝐵 ∧ 𝑥 ⊆ 𝐴 ) ) | |
| 10 | 8 9 | bitr3i | ⊢ ( 𝑥 ⊆ ( 𝐴 ∩ 𝐵 ) ↔ ( 𝑥 ⊆ 𝐵 ∧ 𝑥 ⊆ 𝐴 ) ) |
| 11 | 10 | baibr | ⊢ ( 𝑥 ⊆ 𝐵 → ( 𝑥 ⊆ 𝐴 ↔ 𝑥 ⊆ ( 𝐴 ∩ 𝐵 ) ) ) |
| 12 | 11 | notbid | ⊢ ( 𝑥 ⊆ 𝐵 → ( ¬ 𝑥 ⊆ 𝐴 ↔ ¬ 𝑥 ⊆ ( 𝐴 ∩ 𝐵 ) ) ) |
| 13 | 12 | biimpar | ⊢ ( ( 𝑥 ⊆ 𝐵 ∧ ¬ 𝑥 ⊆ ( 𝐴 ∩ 𝐵 ) ) → ¬ 𝑥 ⊆ 𝐴 ) |
| 14 | chcv1 | ⊢ ( ( 𝐴 ∈ Cℋ ∧ 𝑥 ∈ HAtoms ) → ( ¬ 𝑥 ⊆ 𝐴 ↔ 𝐴 ⋖ℋ ( 𝐴 ∨ℋ 𝑥 ) ) ) | |
| 15 | 1 14 | mpan | ⊢ ( 𝑥 ∈ HAtoms → ( ¬ 𝑥 ⊆ 𝐴 ↔ 𝐴 ⋖ℋ ( 𝐴 ∨ℋ 𝑥 ) ) ) |
| 16 | 15 | biimpa | ⊢ ( ( 𝑥 ∈ HAtoms ∧ ¬ 𝑥 ⊆ 𝐴 ) → 𝐴 ⋖ℋ ( 𝐴 ∨ℋ 𝑥 ) ) |
| 17 | 13 16 | sylan2 | ⊢ ( ( 𝑥 ∈ HAtoms ∧ ( 𝑥 ⊆ 𝐵 ∧ ¬ 𝑥 ⊆ ( 𝐴 ∩ 𝐵 ) ) ) → 𝐴 ⋖ℋ ( 𝐴 ∨ℋ 𝑥 ) ) |
| 18 | 17 | adantrr | ⊢ ( ( 𝑥 ∈ HAtoms ∧ ( ( 𝑥 ⊆ 𝐵 ∧ ¬ 𝑥 ⊆ ( 𝐴 ∩ 𝐵 ) ) ∧ ( 𝐴 ∩ 𝐵 ) ⋖ℋ 𝐵 ) ) → 𝐴 ⋖ℋ ( 𝐴 ∨ℋ 𝑥 ) ) |
| 19 | atelch | ⊢ ( 𝑥 ∈ HAtoms → 𝑥 ∈ Cℋ ) | |
| 20 | chjass | ⊢ ( ( 𝐴 ∈ Cℋ ∧ ( 𝐴 ∩ 𝐵 ) ∈ Cℋ ∧ 𝑥 ∈ Cℋ ) → ( ( 𝐴 ∨ℋ ( 𝐴 ∩ 𝐵 ) ) ∨ℋ 𝑥 ) = ( 𝐴 ∨ℋ ( ( 𝐴 ∩ 𝐵 ) ∨ℋ 𝑥 ) ) ) | |
| 21 | 1 3 20 | mp3an12 | ⊢ ( 𝑥 ∈ Cℋ → ( ( 𝐴 ∨ℋ ( 𝐴 ∩ 𝐵 ) ) ∨ℋ 𝑥 ) = ( 𝐴 ∨ℋ ( ( 𝐴 ∩ 𝐵 ) ∨ℋ 𝑥 ) ) ) |
| 22 | 1 2 | chabs1i | ⊢ ( 𝐴 ∨ℋ ( 𝐴 ∩ 𝐵 ) ) = 𝐴 |
| 23 | 22 | oveq1i | ⊢ ( ( 𝐴 ∨ℋ ( 𝐴 ∩ 𝐵 ) ) ∨ℋ 𝑥 ) = ( 𝐴 ∨ℋ 𝑥 ) |
| 24 | 21 23 | eqtr3di | ⊢ ( 𝑥 ∈ Cℋ → ( 𝐴 ∨ℋ ( ( 𝐴 ∩ 𝐵 ) ∨ℋ 𝑥 ) ) = ( 𝐴 ∨ℋ 𝑥 ) ) |
| 25 | 24 | adantr | ⊢ ( ( 𝑥 ∈ Cℋ ∧ ( ( 𝑥 ⊆ 𝐵 ∧ ¬ 𝑥 ⊆ ( 𝐴 ∩ 𝐵 ) ) ∧ ( 𝐴 ∩ 𝐵 ) ⋖ℋ 𝐵 ) ) → ( 𝐴 ∨ℋ ( ( 𝐴 ∩ 𝐵 ) ∨ℋ 𝑥 ) ) = ( 𝐴 ∨ℋ 𝑥 ) ) |
| 26 | ancom | ⊢ ( ( 𝑥 ⊆ 𝐵 ∧ ¬ 𝑥 ⊆ ( 𝐴 ∩ 𝐵 ) ) ↔ ( ¬ 𝑥 ⊆ ( 𝐴 ∩ 𝐵 ) ∧ 𝑥 ⊆ 𝐵 ) ) | |
| 27 | chnle | ⊢ ( ( ( 𝐴 ∩ 𝐵 ) ∈ Cℋ ∧ 𝑥 ∈ Cℋ ) → ( ¬ 𝑥 ⊆ ( 𝐴 ∩ 𝐵 ) ↔ ( 𝐴 ∩ 𝐵 ) ⊊ ( ( 𝐴 ∩ 𝐵 ) ∨ℋ 𝑥 ) ) ) | |
| 28 | 3 27 | mpan | ⊢ ( 𝑥 ∈ Cℋ → ( ¬ 𝑥 ⊆ ( 𝐴 ∩ 𝐵 ) ↔ ( 𝐴 ∩ 𝐵 ) ⊊ ( ( 𝐴 ∩ 𝐵 ) ∨ℋ 𝑥 ) ) ) |
| 29 | inss2 | ⊢ ( 𝐴 ∩ 𝐵 ) ⊆ 𝐵 | |
| 30 | 29 | biantrur | ⊢ ( 𝑥 ⊆ 𝐵 ↔ ( ( 𝐴 ∩ 𝐵 ) ⊆ 𝐵 ∧ 𝑥 ⊆ 𝐵 ) ) |
| 31 | chlub | ⊢ ( ( ( 𝐴 ∩ 𝐵 ) ∈ Cℋ ∧ 𝑥 ∈ Cℋ ∧ 𝐵 ∈ Cℋ ) → ( ( ( 𝐴 ∩ 𝐵 ) ⊆ 𝐵 ∧ 𝑥 ⊆ 𝐵 ) ↔ ( ( 𝐴 ∩ 𝐵 ) ∨ℋ 𝑥 ) ⊆ 𝐵 ) ) | |
| 32 | 3 2 31 | mp3an13 | ⊢ ( 𝑥 ∈ Cℋ → ( ( ( 𝐴 ∩ 𝐵 ) ⊆ 𝐵 ∧ 𝑥 ⊆ 𝐵 ) ↔ ( ( 𝐴 ∩ 𝐵 ) ∨ℋ 𝑥 ) ⊆ 𝐵 ) ) |
| 33 | 30 32 | bitrid | ⊢ ( 𝑥 ∈ Cℋ → ( 𝑥 ⊆ 𝐵 ↔ ( ( 𝐴 ∩ 𝐵 ) ∨ℋ 𝑥 ) ⊆ 𝐵 ) ) |
| 34 | 28 33 | anbi12d | ⊢ ( 𝑥 ∈ Cℋ → ( ( ¬ 𝑥 ⊆ ( 𝐴 ∩ 𝐵 ) ∧ 𝑥 ⊆ 𝐵 ) ↔ ( ( 𝐴 ∩ 𝐵 ) ⊊ ( ( 𝐴 ∩ 𝐵 ) ∨ℋ 𝑥 ) ∧ ( ( 𝐴 ∩ 𝐵 ) ∨ℋ 𝑥 ) ⊆ 𝐵 ) ) ) |
| 35 | 26 34 | bitrid | ⊢ ( 𝑥 ∈ Cℋ → ( ( 𝑥 ⊆ 𝐵 ∧ ¬ 𝑥 ⊆ ( 𝐴 ∩ 𝐵 ) ) ↔ ( ( 𝐴 ∩ 𝐵 ) ⊊ ( ( 𝐴 ∩ 𝐵 ) ∨ℋ 𝑥 ) ∧ ( ( 𝐴 ∩ 𝐵 ) ∨ℋ 𝑥 ) ⊆ 𝐵 ) ) ) |
| 36 | chjcl | ⊢ ( ( ( 𝐴 ∩ 𝐵 ) ∈ Cℋ ∧ 𝑥 ∈ Cℋ ) → ( ( 𝐴 ∩ 𝐵 ) ∨ℋ 𝑥 ) ∈ Cℋ ) | |
| 37 | 3 36 | mpan | ⊢ ( 𝑥 ∈ Cℋ → ( ( 𝐴 ∩ 𝐵 ) ∨ℋ 𝑥 ) ∈ Cℋ ) |
| 38 | cvnbtwn2 | ⊢ ( ( ( 𝐴 ∩ 𝐵 ) ∈ Cℋ ∧ 𝐵 ∈ Cℋ ∧ ( ( 𝐴 ∩ 𝐵 ) ∨ℋ 𝑥 ) ∈ Cℋ ) → ( ( 𝐴 ∩ 𝐵 ) ⋖ℋ 𝐵 → ( ( ( 𝐴 ∩ 𝐵 ) ⊊ ( ( 𝐴 ∩ 𝐵 ) ∨ℋ 𝑥 ) ∧ ( ( 𝐴 ∩ 𝐵 ) ∨ℋ 𝑥 ) ⊆ 𝐵 ) → ( ( 𝐴 ∩ 𝐵 ) ∨ℋ 𝑥 ) = 𝐵 ) ) ) | |
| 39 | 3 2 38 | mp3an12 | ⊢ ( ( ( 𝐴 ∩ 𝐵 ) ∨ℋ 𝑥 ) ∈ Cℋ → ( ( 𝐴 ∩ 𝐵 ) ⋖ℋ 𝐵 → ( ( ( 𝐴 ∩ 𝐵 ) ⊊ ( ( 𝐴 ∩ 𝐵 ) ∨ℋ 𝑥 ) ∧ ( ( 𝐴 ∩ 𝐵 ) ∨ℋ 𝑥 ) ⊆ 𝐵 ) → ( ( 𝐴 ∩ 𝐵 ) ∨ℋ 𝑥 ) = 𝐵 ) ) ) |
| 40 | 37 39 | syl | ⊢ ( 𝑥 ∈ Cℋ → ( ( 𝐴 ∩ 𝐵 ) ⋖ℋ 𝐵 → ( ( ( 𝐴 ∩ 𝐵 ) ⊊ ( ( 𝐴 ∩ 𝐵 ) ∨ℋ 𝑥 ) ∧ ( ( 𝐴 ∩ 𝐵 ) ∨ℋ 𝑥 ) ⊆ 𝐵 ) → ( ( 𝐴 ∩ 𝐵 ) ∨ℋ 𝑥 ) = 𝐵 ) ) ) |
| 41 | 40 | com23 | ⊢ ( 𝑥 ∈ Cℋ → ( ( ( 𝐴 ∩ 𝐵 ) ⊊ ( ( 𝐴 ∩ 𝐵 ) ∨ℋ 𝑥 ) ∧ ( ( 𝐴 ∩ 𝐵 ) ∨ℋ 𝑥 ) ⊆ 𝐵 ) → ( ( 𝐴 ∩ 𝐵 ) ⋖ℋ 𝐵 → ( ( 𝐴 ∩ 𝐵 ) ∨ℋ 𝑥 ) = 𝐵 ) ) ) |
| 42 | 35 41 | sylbid | ⊢ ( 𝑥 ∈ Cℋ → ( ( 𝑥 ⊆ 𝐵 ∧ ¬ 𝑥 ⊆ ( 𝐴 ∩ 𝐵 ) ) → ( ( 𝐴 ∩ 𝐵 ) ⋖ℋ 𝐵 → ( ( 𝐴 ∩ 𝐵 ) ∨ℋ 𝑥 ) = 𝐵 ) ) ) |
| 43 | 42 | imp32 | ⊢ ( ( 𝑥 ∈ Cℋ ∧ ( ( 𝑥 ⊆ 𝐵 ∧ ¬ 𝑥 ⊆ ( 𝐴 ∩ 𝐵 ) ) ∧ ( 𝐴 ∩ 𝐵 ) ⋖ℋ 𝐵 ) ) → ( ( 𝐴 ∩ 𝐵 ) ∨ℋ 𝑥 ) = 𝐵 ) |
| 44 | 43 | oveq2d | ⊢ ( ( 𝑥 ∈ Cℋ ∧ ( ( 𝑥 ⊆ 𝐵 ∧ ¬ 𝑥 ⊆ ( 𝐴 ∩ 𝐵 ) ) ∧ ( 𝐴 ∩ 𝐵 ) ⋖ℋ 𝐵 ) ) → ( 𝐴 ∨ℋ ( ( 𝐴 ∩ 𝐵 ) ∨ℋ 𝑥 ) ) = ( 𝐴 ∨ℋ 𝐵 ) ) |
| 45 | 25 44 | eqtr3d | ⊢ ( ( 𝑥 ∈ Cℋ ∧ ( ( 𝑥 ⊆ 𝐵 ∧ ¬ 𝑥 ⊆ ( 𝐴 ∩ 𝐵 ) ) ∧ ( 𝐴 ∩ 𝐵 ) ⋖ℋ 𝐵 ) ) → ( 𝐴 ∨ℋ 𝑥 ) = ( 𝐴 ∨ℋ 𝐵 ) ) |
| 46 | 19 45 | sylan | ⊢ ( ( 𝑥 ∈ HAtoms ∧ ( ( 𝑥 ⊆ 𝐵 ∧ ¬ 𝑥 ⊆ ( 𝐴 ∩ 𝐵 ) ) ∧ ( 𝐴 ∩ 𝐵 ) ⋖ℋ 𝐵 ) ) → ( 𝐴 ∨ℋ 𝑥 ) = ( 𝐴 ∨ℋ 𝐵 ) ) |
| 47 | 18 46 | breqtrd | ⊢ ( ( 𝑥 ∈ HAtoms ∧ ( ( 𝑥 ⊆ 𝐵 ∧ ¬ 𝑥 ⊆ ( 𝐴 ∩ 𝐵 ) ) ∧ ( 𝐴 ∩ 𝐵 ) ⋖ℋ 𝐵 ) ) → 𝐴 ⋖ℋ ( 𝐴 ∨ℋ 𝐵 ) ) |
| 48 | 47 | exp32 | ⊢ ( 𝑥 ∈ HAtoms → ( ( 𝑥 ⊆ 𝐵 ∧ ¬ 𝑥 ⊆ ( 𝐴 ∩ 𝐵 ) ) → ( ( 𝐴 ∩ 𝐵 ) ⋖ℋ 𝐵 → 𝐴 ⋖ℋ ( 𝐴 ∨ℋ 𝐵 ) ) ) ) |
| 49 | 48 | rexlimiv | ⊢ ( ∃ 𝑥 ∈ HAtoms ( 𝑥 ⊆ 𝐵 ∧ ¬ 𝑥 ⊆ ( 𝐴 ∩ 𝐵 ) ) → ( ( 𝐴 ∩ 𝐵 ) ⋖ℋ 𝐵 → 𝐴 ⋖ℋ ( 𝐴 ∨ℋ 𝐵 ) ) ) |
| 50 | 7 49 | mpcom | ⊢ ( ( 𝐴 ∩ 𝐵 ) ⋖ℋ 𝐵 → 𝐴 ⋖ℋ ( 𝐴 ∨ℋ 𝐵 ) ) |