This is an inofficial mirror of http://metamath.tirix.org for personal testing of a visualizer extension only.
Description: Part of proof of Lemma E in Crawley p. 113, 3rd paragraph, 9th line on p. 115. (Contributed by NM, 4-Dec-2012)
| Ref | Expression | ||
|---|---|---|---|
| Hypotheses | cdleme22.l | ⊢ ≤ = ( le ‘ 𝐾 ) | |
| cdleme22.j | ⊢ ∨ = ( join ‘ 𝐾 ) | ||
| cdleme22.m | ⊢ ∧ = ( meet ‘ 𝐾 ) | ||
| cdleme22.a | ⊢ 𝐴 = ( Atoms ‘ 𝐾 ) | ||
| cdleme22.h | ⊢ 𝐻 = ( LHyp ‘ 𝐾 ) | ||
| Assertion | cdleme22d | ⊢ ( ( ( 𝐾 ∈ HL ∧ 𝑊 ∈ 𝐻 ) ∧ ( ( 𝑆 ∈ 𝐴 ∧ ¬ 𝑆 ≤ 𝑊 ) ∧ ( 𝑇 ∈ 𝐴 ∧ ¬ 𝑇 ≤ 𝑊 ) ∧ ( 𝑉 ∈ 𝐴 ∧ 𝑉 ≤ 𝑊 ) ) ∧ ( 𝑆 ≠ 𝑇 ∧ 𝑆 ≤ ( 𝑇 ∨ 𝑉 ) ) ) → 𝑉 = ( ( 𝑆 ∨ 𝑇 ) ∧ 𝑊 ) ) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | cdleme22.l | ⊢ ≤ = ( le ‘ 𝐾 ) | |
| 2 | cdleme22.j | ⊢ ∨ = ( join ‘ 𝐾 ) | |
| 3 | cdleme22.m | ⊢ ∧ = ( meet ‘ 𝐾 ) | |
| 4 | cdleme22.a | ⊢ 𝐴 = ( Atoms ‘ 𝐾 ) | |
| 5 | cdleme22.h | ⊢ 𝐻 = ( LHyp ‘ 𝐾 ) | |
| 6 | simp3r | ⊢ ( ( ( 𝐾 ∈ HL ∧ 𝑊 ∈ 𝐻 ) ∧ ( ( 𝑆 ∈ 𝐴 ∧ ¬ 𝑆 ≤ 𝑊 ) ∧ ( 𝑇 ∈ 𝐴 ∧ ¬ 𝑇 ≤ 𝑊 ) ∧ ( 𝑉 ∈ 𝐴 ∧ 𝑉 ≤ 𝑊 ) ) ∧ ( 𝑆 ≠ 𝑇 ∧ 𝑆 ≤ ( 𝑇 ∨ 𝑉 ) ) ) → 𝑆 ≤ ( 𝑇 ∨ 𝑉 ) ) | |
| 7 | simp1l | ⊢ ( ( ( 𝐾 ∈ HL ∧ 𝑊 ∈ 𝐻 ) ∧ ( ( 𝑆 ∈ 𝐴 ∧ ¬ 𝑆 ≤ 𝑊 ) ∧ ( 𝑇 ∈ 𝐴 ∧ ¬ 𝑇 ≤ 𝑊 ) ∧ ( 𝑉 ∈ 𝐴 ∧ 𝑉 ≤ 𝑊 ) ) ∧ ( 𝑆 ≠ 𝑇 ∧ 𝑆 ≤ ( 𝑇 ∨ 𝑉 ) ) ) → 𝐾 ∈ HL ) | |
| 8 | simp22l | ⊢ ( ( ( 𝐾 ∈ HL ∧ 𝑊 ∈ 𝐻 ) ∧ ( ( 𝑆 ∈ 𝐴 ∧ ¬ 𝑆 ≤ 𝑊 ) ∧ ( 𝑇 ∈ 𝐴 ∧ ¬ 𝑇 ≤ 𝑊 ) ∧ ( 𝑉 ∈ 𝐴 ∧ 𝑉 ≤ 𝑊 ) ) ∧ ( 𝑆 ≠ 𝑇 ∧ 𝑆 ≤ ( 𝑇 ∨ 𝑉 ) ) ) → 𝑇 ∈ 𝐴 ) | |
| 9 | simp23l | ⊢ ( ( ( 𝐾 ∈ HL ∧ 𝑊 ∈ 𝐻 ) ∧ ( ( 𝑆 ∈ 𝐴 ∧ ¬ 𝑆 ≤ 𝑊 ) ∧ ( 𝑇 ∈ 𝐴 ∧ ¬ 𝑇 ≤ 𝑊 ) ∧ ( 𝑉 ∈ 𝐴 ∧ 𝑉 ≤ 𝑊 ) ) ∧ ( 𝑆 ≠ 𝑇 ∧ 𝑆 ≤ ( 𝑇 ∨ 𝑉 ) ) ) → 𝑉 ∈ 𝐴 ) | |
| 10 | 1 2 4 | hlatlej1 | ⊢ ( ( 𝐾 ∈ HL ∧ 𝑇 ∈ 𝐴 ∧ 𝑉 ∈ 𝐴 ) → 𝑇 ≤ ( 𝑇 ∨ 𝑉 ) ) |
| 11 | 7 8 9 10 | syl3anc | ⊢ ( ( ( 𝐾 ∈ HL ∧ 𝑊 ∈ 𝐻 ) ∧ ( ( 𝑆 ∈ 𝐴 ∧ ¬ 𝑆 ≤ 𝑊 ) ∧ ( 𝑇 ∈ 𝐴 ∧ ¬ 𝑇 ≤ 𝑊 ) ∧ ( 𝑉 ∈ 𝐴 ∧ 𝑉 ≤ 𝑊 ) ) ∧ ( 𝑆 ≠ 𝑇 ∧ 𝑆 ≤ ( 𝑇 ∨ 𝑉 ) ) ) → 𝑇 ≤ ( 𝑇 ∨ 𝑉 ) ) |
| 12 | 7 | hllatd | ⊢ ( ( ( 𝐾 ∈ HL ∧ 𝑊 ∈ 𝐻 ) ∧ ( ( 𝑆 ∈ 𝐴 ∧ ¬ 𝑆 ≤ 𝑊 ) ∧ ( 𝑇 ∈ 𝐴 ∧ ¬ 𝑇 ≤ 𝑊 ) ∧ ( 𝑉 ∈ 𝐴 ∧ 𝑉 ≤ 𝑊 ) ) ∧ ( 𝑆 ≠ 𝑇 ∧ 𝑆 ≤ ( 𝑇 ∨ 𝑉 ) ) ) → 𝐾 ∈ Lat ) |
| 13 | simp21l | ⊢ ( ( ( 𝐾 ∈ HL ∧ 𝑊 ∈ 𝐻 ) ∧ ( ( 𝑆 ∈ 𝐴 ∧ ¬ 𝑆 ≤ 𝑊 ) ∧ ( 𝑇 ∈ 𝐴 ∧ ¬ 𝑇 ≤ 𝑊 ) ∧ ( 𝑉 ∈ 𝐴 ∧ 𝑉 ≤ 𝑊 ) ) ∧ ( 𝑆 ≠ 𝑇 ∧ 𝑆 ≤ ( 𝑇 ∨ 𝑉 ) ) ) → 𝑆 ∈ 𝐴 ) | |
| 14 | eqid | ⊢ ( Base ‘ 𝐾 ) = ( Base ‘ 𝐾 ) | |
| 15 | 14 4 | atbase | ⊢ ( 𝑆 ∈ 𝐴 → 𝑆 ∈ ( Base ‘ 𝐾 ) ) |
| 16 | 13 15 | syl | ⊢ ( ( ( 𝐾 ∈ HL ∧ 𝑊 ∈ 𝐻 ) ∧ ( ( 𝑆 ∈ 𝐴 ∧ ¬ 𝑆 ≤ 𝑊 ) ∧ ( 𝑇 ∈ 𝐴 ∧ ¬ 𝑇 ≤ 𝑊 ) ∧ ( 𝑉 ∈ 𝐴 ∧ 𝑉 ≤ 𝑊 ) ) ∧ ( 𝑆 ≠ 𝑇 ∧ 𝑆 ≤ ( 𝑇 ∨ 𝑉 ) ) ) → 𝑆 ∈ ( Base ‘ 𝐾 ) ) |
| 17 | 14 4 | atbase | ⊢ ( 𝑇 ∈ 𝐴 → 𝑇 ∈ ( Base ‘ 𝐾 ) ) |
| 18 | 8 17 | syl | ⊢ ( ( ( 𝐾 ∈ HL ∧ 𝑊 ∈ 𝐻 ) ∧ ( ( 𝑆 ∈ 𝐴 ∧ ¬ 𝑆 ≤ 𝑊 ) ∧ ( 𝑇 ∈ 𝐴 ∧ ¬ 𝑇 ≤ 𝑊 ) ∧ ( 𝑉 ∈ 𝐴 ∧ 𝑉 ≤ 𝑊 ) ) ∧ ( 𝑆 ≠ 𝑇 ∧ 𝑆 ≤ ( 𝑇 ∨ 𝑉 ) ) ) → 𝑇 ∈ ( Base ‘ 𝐾 ) ) |
| 19 | 14 2 4 | hlatjcl | ⊢ ( ( 𝐾 ∈ HL ∧ 𝑇 ∈ 𝐴 ∧ 𝑉 ∈ 𝐴 ) → ( 𝑇 ∨ 𝑉 ) ∈ ( Base ‘ 𝐾 ) ) |
| 20 | 7 8 9 19 | syl3anc | ⊢ ( ( ( 𝐾 ∈ HL ∧ 𝑊 ∈ 𝐻 ) ∧ ( ( 𝑆 ∈ 𝐴 ∧ ¬ 𝑆 ≤ 𝑊 ) ∧ ( 𝑇 ∈ 𝐴 ∧ ¬ 𝑇 ≤ 𝑊 ) ∧ ( 𝑉 ∈ 𝐴 ∧ 𝑉 ≤ 𝑊 ) ) ∧ ( 𝑆 ≠ 𝑇 ∧ 𝑆 ≤ ( 𝑇 ∨ 𝑉 ) ) ) → ( 𝑇 ∨ 𝑉 ) ∈ ( Base ‘ 𝐾 ) ) |
| 21 | 14 1 2 | latjle12 | ⊢ ( ( 𝐾 ∈ Lat ∧ ( 𝑆 ∈ ( Base ‘ 𝐾 ) ∧ 𝑇 ∈ ( Base ‘ 𝐾 ) ∧ ( 𝑇 ∨ 𝑉 ) ∈ ( Base ‘ 𝐾 ) ) ) → ( ( 𝑆 ≤ ( 𝑇 ∨ 𝑉 ) ∧ 𝑇 ≤ ( 𝑇 ∨ 𝑉 ) ) ↔ ( 𝑆 ∨ 𝑇 ) ≤ ( 𝑇 ∨ 𝑉 ) ) ) |
| 22 | 12 16 18 20 21 | syl13anc | ⊢ ( ( ( 𝐾 ∈ HL ∧ 𝑊 ∈ 𝐻 ) ∧ ( ( 𝑆 ∈ 𝐴 ∧ ¬ 𝑆 ≤ 𝑊 ) ∧ ( 𝑇 ∈ 𝐴 ∧ ¬ 𝑇 ≤ 𝑊 ) ∧ ( 𝑉 ∈ 𝐴 ∧ 𝑉 ≤ 𝑊 ) ) ∧ ( 𝑆 ≠ 𝑇 ∧ 𝑆 ≤ ( 𝑇 ∨ 𝑉 ) ) ) → ( ( 𝑆 ≤ ( 𝑇 ∨ 𝑉 ) ∧ 𝑇 ≤ ( 𝑇 ∨ 𝑉 ) ) ↔ ( 𝑆 ∨ 𝑇 ) ≤ ( 𝑇 ∨ 𝑉 ) ) ) |
| 23 | 6 11 22 | mpbi2and | ⊢ ( ( ( 𝐾 ∈ HL ∧ 𝑊 ∈ 𝐻 ) ∧ ( ( 𝑆 ∈ 𝐴 ∧ ¬ 𝑆 ≤ 𝑊 ) ∧ ( 𝑇 ∈ 𝐴 ∧ ¬ 𝑇 ≤ 𝑊 ) ∧ ( 𝑉 ∈ 𝐴 ∧ 𝑉 ≤ 𝑊 ) ) ∧ ( 𝑆 ≠ 𝑇 ∧ 𝑆 ≤ ( 𝑇 ∨ 𝑉 ) ) ) → ( 𝑆 ∨ 𝑇 ) ≤ ( 𝑇 ∨ 𝑉 ) ) |
| 24 | 14 2 4 | hlatjcl | ⊢ ( ( 𝐾 ∈ HL ∧ 𝑆 ∈ 𝐴 ∧ 𝑇 ∈ 𝐴 ) → ( 𝑆 ∨ 𝑇 ) ∈ ( Base ‘ 𝐾 ) ) |
| 25 | 7 13 8 24 | syl3anc | ⊢ ( ( ( 𝐾 ∈ HL ∧ 𝑊 ∈ 𝐻 ) ∧ ( ( 𝑆 ∈ 𝐴 ∧ ¬ 𝑆 ≤ 𝑊 ) ∧ ( 𝑇 ∈ 𝐴 ∧ ¬ 𝑇 ≤ 𝑊 ) ∧ ( 𝑉 ∈ 𝐴 ∧ 𝑉 ≤ 𝑊 ) ) ∧ ( 𝑆 ≠ 𝑇 ∧ 𝑆 ≤ ( 𝑇 ∨ 𝑉 ) ) ) → ( 𝑆 ∨ 𝑇 ) ∈ ( Base ‘ 𝐾 ) ) |
| 26 | simp1r | ⊢ ( ( ( 𝐾 ∈ HL ∧ 𝑊 ∈ 𝐻 ) ∧ ( ( 𝑆 ∈ 𝐴 ∧ ¬ 𝑆 ≤ 𝑊 ) ∧ ( 𝑇 ∈ 𝐴 ∧ ¬ 𝑇 ≤ 𝑊 ) ∧ ( 𝑉 ∈ 𝐴 ∧ 𝑉 ≤ 𝑊 ) ) ∧ ( 𝑆 ≠ 𝑇 ∧ 𝑆 ≤ ( 𝑇 ∨ 𝑉 ) ) ) → 𝑊 ∈ 𝐻 ) | |
| 27 | 14 5 | lhpbase | ⊢ ( 𝑊 ∈ 𝐻 → 𝑊 ∈ ( Base ‘ 𝐾 ) ) |
| 28 | 26 27 | syl | ⊢ ( ( ( 𝐾 ∈ HL ∧ 𝑊 ∈ 𝐻 ) ∧ ( ( 𝑆 ∈ 𝐴 ∧ ¬ 𝑆 ≤ 𝑊 ) ∧ ( 𝑇 ∈ 𝐴 ∧ ¬ 𝑇 ≤ 𝑊 ) ∧ ( 𝑉 ∈ 𝐴 ∧ 𝑉 ≤ 𝑊 ) ) ∧ ( 𝑆 ≠ 𝑇 ∧ 𝑆 ≤ ( 𝑇 ∨ 𝑉 ) ) ) → 𝑊 ∈ ( Base ‘ 𝐾 ) ) |
| 29 | 14 1 3 | latmlem1 | ⊢ ( ( 𝐾 ∈ Lat ∧ ( ( 𝑆 ∨ 𝑇 ) ∈ ( Base ‘ 𝐾 ) ∧ ( 𝑇 ∨ 𝑉 ) ∈ ( Base ‘ 𝐾 ) ∧ 𝑊 ∈ ( Base ‘ 𝐾 ) ) ) → ( ( 𝑆 ∨ 𝑇 ) ≤ ( 𝑇 ∨ 𝑉 ) → ( ( 𝑆 ∨ 𝑇 ) ∧ 𝑊 ) ≤ ( ( 𝑇 ∨ 𝑉 ) ∧ 𝑊 ) ) ) |
| 30 | 12 25 20 28 29 | syl13anc | ⊢ ( ( ( 𝐾 ∈ HL ∧ 𝑊 ∈ 𝐻 ) ∧ ( ( 𝑆 ∈ 𝐴 ∧ ¬ 𝑆 ≤ 𝑊 ) ∧ ( 𝑇 ∈ 𝐴 ∧ ¬ 𝑇 ≤ 𝑊 ) ∧ ( 𝑉 ∈ 𝐴 ∧ 𝑉 ≤ 𝑊 ) ) ∧ ( 𝑆 ≠ 𝑇 ∧ 𝑆 ≤ ( 𝑇 ∨ 𝑉 ) ) ) → ( ( 𝑆 ∨ 𝑇 ) ≤ ( 𝑇 ∨ 𝑉 ) → ( ( 𝑆 ∨ 𝑇 ) ∧ 𝑊 ) ≤ ( ( 𝑇 ∨ 𝑉 ) ∧ 𝑊 ) ) ) |
| 31 | 23 30 | mpd | ⊢ ( ( ( 𝐾 ∈ HL ∧ 𝑊 ∈ 𝐻 ) ∧ ( ( 𝑆 ∈ 𝐴 ∧ ¬ 𝑆 ≤ 𝑊 ) ∧ ( 𝑇 ∈ 𝐴 ∧ ¬ 𝑇 ≤ 𝑊 ) ∧ ( 𝑉 ∈ 𝐴 ∧ 𝑉 ≤ 𝑊 ) ) ∧ ( 𝑆 ≠ 𝑇 ∧ 𝑆 ≤ ( 𝑇 ∨ 𝑉 ) ) ) → ( ( 𝑆 ∨ 𝑇 ) ∧ 𝑊 ) ≤ ( ( 𝑇 ∨ 𝑉 ) ∧ 𝑊 ) ) |
| 32 | simp1 | ⊢ ( ( ( 𝐾 ∈ HL ∧ 𝑊 ∈ 𝐻 ) ∧ ( ( 𝑆 ∈ 𝐴 ∧ ¬ 𝑆 ≤ 𝑊 ) ∧ ( 𝑇 ∈ 𝐴 ∧ ¬ 𝑇 ≤ 𝑊 ) ∧ ( 𝑉 ∈ 𝐴 ∧ 𝑉 ≤ 𝑊 ) ) ∧ ( 𝑆 ≠ 𝑇 ∧ 𝑆 ≤ ( 𝑇 ∨ 𝑉 ) ) ) → ( 𝐾 ∈ HL ∧ 𝑊 ∈ 𝐻 ) ) | |
| 33 | simp22 | ⊢ ( ( ( 𝐾 ∈ HL ∧ 𝑊 ∈ 𝐻 ) ∧ ( ( 𝑆 ∈ 𝐴 ∧ ¬ 𝑆 ≤ 𝑊 ) ∧ ( 𝑇 ∈ 𝐴 ∧ ¬ 𝑇 ≤ 𝑊 ) ∧ ( 𝑉 ∈ 𝐴 ∧ 𝑉 ≤ 𝑊 ) ) ∧ ( 𝑆 ≠ 𝑇 ∧ 𝑆 ≤ ( 𝑇 ∨ 𝑉 ) ) ) → ( 𝑇 ∈ 𝐴 ∧ ¬ 𝑇 ≤ 𝑊 ) ) | |
| 34 | eqid | ⊢ ( 0. ‘ 𝐾 ) = ( 0. ‘ 𝐾 ) | |
| 35 | 1 3 34 4 5 | lhpmat | ⊢ ( ( ( 𝐾 ∈ HL ∧ 𝑊 ∈ 𝐻 ) ∧ ( 𝑇 ∈ 𝐴 ∧ ¬ 𝑇 ≤ 𝑊 ) ) → ( 𝑇 ∧ 𝑊 ) = ( 0. ‘ 𝐾 ) ) |
| 36 | 32 33 35 | syl2anc | ⊢ ( ( ( 𝐾 ∈ HL ∧ 𝑊 ∈ 𝐻 ) ∧ ( ( 𝑆 ∈ 𝐴 ∧ ¬ 𝑆 ≤ 𝑊 ) ∧ ( 𝑇 ∈ 𝐴 ∧ ¬ 𝑇 ≤ 𝑊 ) ∧ ( 𝑉 ∈ 𝐴 ∧ 𝑉 ≤ 𝑊 ) ) ∧ ( 𝑆 ≠ 𝑇 ∧ 𝑆 ≤ ( 𝑇 ∨ 𝑉 ) ) ) → ( 𝑇 ∧ 𝑊 ) = ( 0. ‘ 𝐾 ) ) |
| 37 | 36 | oveq1d | ⊢ ( ( ( 𝐾 ∈ HL ∧ 𝑊 ∈ 𝐻 ) ∧ ( ( 𝑆 ∈ 𝐴 ∧ ¬ 𝑆 ≤ 𝑊 ) ∧ ( 𝑇 ∈ 𝐴 ∧ ¬ 𝑇 ≤ 𝑊 ) ∧ ( 𝑉 ∈ 𝐴 ∧ 𝑉 ≤ 𝑊 ) ) ∧ ( 𝑆 ≠ 𝑇 ∧ 𝑆 ≤ ( 𝑇 ∨ 𝑉 ) ) ) → ( ( 𝑇 ∧ 𝑊 ) ∨ 𝑉 ) = ( ( 0. ‘ 𝐾 ) ∨ 𝑉 ) ) |
| 38 | simp23r | ⊢ ( ( ( 𝐾 ∈ HL ∧ 𝑊 ∈ 𝐻 ) ∧ ( ( 𝑆 ∈ 𝐴 ∧ ¬ 𝑆 ≤ 𝑊 ) ∧ ( 𝑇 ∈ 𝐴 ∧ ¬ 𝑇 ≤ 𝑊 ) ∧ ( 𝑉 ∈ 𝐴 ∧ 𝑉 ≤ 𝑊 ) ) ∧ ( 𝑆 ≠ 𝑇 ∧ 𝑆 ≤ ( 𝑇 ∨ 𝑉 ) ) ) → 𝑉 ≤ 𝑊 ) | |
| 39 | 14 1 2 3 4 | atmod4i1 | ⊢ ( ( 𝐾 ∈ HL ∧ ( 𝑉 ∈ 𝐴 ∧ 𝑇 ∈ ( Base ‘ 𝐾 ) ∧ 𝑊 ∈ ( Base ‘ 𝐾 ) ) ∧ 𝑉 ≤ 𝑊 ) → ( ( 𝑇 ∧ 𝑊 ) ∨ 𝑉 ) = ( ( 𝑇 ∨ 𝑉 ) ∧ 𝑊 ) ) |
| 40 | 7 9 18 28 38 39 | syl131anc | ⊢ ( ( ( 𝐾 ∈ HL ∧ 𝑊 ∈ 𝐻 ) ∧ ( ( 𝑆 ∈ 𝐴 ∧ ¬ 𝑆 ≤ 𝑊 ) ∧ ( 𝑇 ∈ 𝐴 ∧ ¬ 𝑇 ≤ 𝑊 ) ∧ ( 𝑉 ∈ 𝐴 ∧ 𝑉 ≤ 𝑊 ) ) ∧ ( 𝑆 ≠ 𝑇 ∧ 𝑆 ≤ ( 𝑇 ∨ 𝑉 ) ) ) → ( ( 𝑇 ∧ 𝑊 ) ∨ 𝑉 ) = ( ( 𝑇 ∨ 𝑉 ) ∧ 𝑊 ) ) |
| 41 | hlol | ⊢ ( 𝐾 ∈ HL → 𝐾 ∈ OL ) | |
| 42 | 7 41 | syl | ⊢ ( ( ( 𝐾 ∈ HL ∧ 𝑊 ∈ 𝐻 ) ∧ ( ( 𝑆 ∈ 𝐴 ∧ ¬ 𝑆 ≤ 𝑊 ) ∧ ( 𝑇 ∈ 𝐴 ∧ ¬ 𝑇 ≤ 𝑊 ) ∧ ( 𝑉 ∈ 𝐴 ∧ 𝑉 ≤ 𝑊 ) ) ∧ ( 𝑆 ≠ 𝑇 ∧ 𝑆 ≤ ( 𝑇 ∨ 𝑉 ) ) ) → 𝐾 ∈ OL ) |
| 43 | 14 4 | atbase | ⊢ ( 𝑉 ∈ 𝐴 → 𝑉 ∈ ( Base ‘ 𝐾 ) ) |
| 44 | 9 43 | syl | ⊢ ( ( ( 𝐾 ∈ HL ∧ 𝑊 ∈ 𝐻 ) ∧ ( ( 𝑆 ∈ 𝐴 ∧ ¬ 𝑆 ≤ 𝑊 ) ∧ ( 𝑇 ∈ 𝐴 ∧ ¬ 𝑇 ≤ 𝑊 ) ∧ ( 𝑉 ∈ 𝐴 ∧ 𝑉 ≤ 𝑊 ) ) ∧ ( 𝑆 ≠ 𝑇 ∧ 𝑆 ≤ ( 𝑇 ∨ 𝑉 ) ) ) → 𝑉 ∈ ( Base ‘ 𝐾 ) ) |
| 45 | 14 2 34 | olj02 | ⊢ ( ( 𝐾 ∈ OL ∧ 𝑉 ∈ ( Base ‘ 𝐾 ) ) → ( ( 0. ‘ 𝐾 ) ∨ 𝑉 ) = 𝑉 ) |
| 46 | 42 44 45 | syl2anc | ⊢ ( ( ( 𝐾 ∈ HL ∧ 𝑊 ∈ 𝐻 ) ∧ ( ( 𝑆 ∈ 𝐴 ∧ ¬ 𝑆 ≤ 𝑊 ) ∧ ( 𝑇 ∈ 𝐴 ∧ ¬ 𝑇 ≤ 𝑊 ) ∧ ( 𝑉 ∈ 𝐴 ∧ 𝑉 ≤ 𝑊 ) ) ∧ ( 𝑆 ≠ 𝑇 ∧ 𝑆 ≤ ( 𝑇 ∨ 𝑉 ) ) ) → ( ( 0. ‘ 𝐾 ) ∨ 𝑉 ) = 𝑉 ) |
| 47 | 37 40 46 | 3eqtr3d | ⊢ ( ( ( 𝐾 ∈ HL ∧ 𝑊 ∈ 𝐻 ) ∧ ( ( 𝑆 ∈ 𝐴 ∧ ¬ 𝑆 ≤ 𝑊 ) ∧ ( 𝑇 ∈ 𝐴 ∧ ¬ 𝑇 ≤ 𝑊 ) ∧ ( 𝑉 ∈ 𝐴 ∧ 𝑉 ≤ 𝑊 ) ) ∧ ( 𝑆 ≠ 𝑇 ∧ 𝑆 ≤ ( 𝑇 ∨ 𝑉 ) ) ) → ( ( 𝑇 ∨ 𝑉 ) ∧ 𝑊 ) = 𝑉 ) |
| 48 | 31 47 | breqtrd | ⊢ ( ( ( 𝐾 ∈ HL ∧ 𝑊 ∈ 𝐻 ) ∧ ( ( 𝑆 ∈ 𝐴 ∧ ¬ 𝑆 ≤ 𝑊 ) ∧ ( 𝑇 ∈ 𝐴 ∧ ¬ 𝑇 ≤ 𝑊 ) ∧ ( 𝑉 ∈ 𝐴 ∧ 𝑉 ≤ 𝑊 ) ) ∧ ( 𝑆 ≠ 𝑇 ∧ 𝑆 ≤ ( 𝑇 ∨ 𝑉 ) ) ) → ( ( 𝑆 ∨ 𝑇 ) ∧ 𝑊 ) ≤ 𝑉 ) |
| 49 | hlatl | ⊢ ( 𝐾 ∈ HL → 𝐾 ∈ AtLat ) | |
| 50 | 7 49 | syl | ⊢ ( ( ( 𝐾 ∈ HL ∧ 𝑊 ∈ 𝐻 ) ∧ ( ( 𝑆 ∈ 𝐴 ∧ ¬ 𝑆 ≤ 𝑊 ) ∧ ( 𝑇 ∈ 𝐴 ∧ ¬ 𝑇 ≤ 𝑊 ) ∧ ( 𝑉 ∈ 𝐴 ∧ 𝑉 ≤ 𝑊 ) ) ∧ ( 𝑆 ≠ 𝑇 ∧ 𝑆 ≤ ( 𝑇 ∨ 𝑉 ) ) ) → 𝐾 ∈ AtLat ) |
| 51 | simp21r | ⊢ ( ( ( 𝐾 ∈ HL ∧ 𝑊 ∈ 𝐻 ) ∧ ( ( 𝑆 ∈ 𝐴 ∧ ¬ 𝑆 ≤ 𝑊 ) ∧ ( 𝑇 ∈ 𝐴 ∧ ¬ 𝑇 ≤ 𝑊 ) ∧ ( 𝑉 ∈ 𝐴 ∧ 𝑉 ≤ 𝑊 ) ) ∧ ( 𝑆 ≠ 𝑇 ∧ 𝑆 ≤ ( 𝑇 ∨ 𝑉 ) ) ) → ¬ 𝑆 ≤ 𝑊 ) | |
| 52 | simp3l | ⊢ ( ( ( 𝐾 ∈ HL ∧ 𝑊 ∈ 𝐻 ) ∧ ( ( 𝑆 ∈ 𝐴 ∧ ¬ 𝑆 ≤ 𝑊 ) ∧ ( 𝑇 ∈ 𝐴 ∧ ¬ 𝑇 ≤ 𝑊 ) ∧ ( 𝑉 ∈ 𝐴 ∧ 𝑉 ≤ 𝑊 ) ) ∧ ( 𝑆 ≠ 𝑇 ∧ 𝑆 ≤ ( 𝑇 ∨ 𝑉 ) ) ) → 𝑆 ≠ 𝑇 ) | |
| 53 | 1 2 3 4 5 | lhpat | ⊢ ( ( ( 𝐾 ∈ HL ∧ 𝑊 ∈ 𝐻 ) ∧ ( 𝑆 ∈ 𝐴 ∧ ¬ 𝑆 ≤ 𝑊 ) ∧ ( 𝑇 ∈ 𝐴 ∧ 𝑆 ≠ 𝑇 ) ) → ( ( 𝑆 ∨ 𝑇 ) ∧ 𝑊 ) ∈ 𝐴 ) |
| 54 | 7 26 13 51 8 52 53 | syl222anc | ⊢ ( ( ( 𝐾 ∈ HL ∧ 𝑊 ∈ 𝐻 ) ∧ ( ( 𝑆 ∈ 𝐴 ∧ ¬ 𝑆 ≤ 𝑊 ) ∧ ( 𝑇 ∈ 𝐴 ∧ ¬ 𝑇 ≤ 𝑊 ) ∧ ( 𝑉 ∈ 𝐴 ∧ 𝑉 ≤ 𝑊 ) ) ∧ ( 𝑆 ≠ 𝑇 ∧ 𝑆 ≤ ( 𝑇 ∨ 𝑉 ) ) ) → ( ( 𝑆 ∨ 𝑇 ) ∧ 𝑊 ) ∈ 𝐴 ) |
| 55 | 1 4 | atcmp | ⊢ ( ( 𝐾 ∈ AtLat ∧ ( ( 𝑆 ∨ 𝑇 ) ∧ 𝑊 ) ∈ 𝐴 ∧ 𝑉 ∈ 𝐴 ) → ( ( ( 𝑆 ∨ 𝑇 ) ∧ 𝑊 ) ≤ 𝑉 ↔ ( ( 𝑆 ∨ 𝑇 ) ∧ 𝑊 ) = 𝑉 ) ) |
| 56 | 50 54 9 55 | syl3anc | ⊢ ( ( ( 𝐾 ∈ HL ∧ 𝑊 ∈ 𝐻 ) ∧ ( ( 𝑆 ∈ 𝐴 ∧ ¬ 𝑆 ≤ 𝑊 ) ∧ ( 𝑇 ∈ 𝐴 ∧ ¬ 𝑇 ≤ 𝑊 ) ∧ ( 𝑉 ∈ 𝐴 ∧ 𝑉 ≤ 𝑊 ) ) ∧ ( 𝑆 ≠ 𝑇 ∧ 𝑆 ≤ ( 𝑇 ∨ 𝑉 ) ) ) → ( ( ( 𝑆 ∨ 𝑇 ) ∧ 𝑊 ) ≤ 𝑉 ↔ ( ( 𝑆 ∨ 𝑇 ) ∧ 𝑊 ) = 𝑉 ) ) |
| 57 | 48 56 | mpbid | ⊢ ( ( ( 𝐾 ∈ HL ∧ 𝑊 ∈ 𝐻 ) ∧ ( ( 𝑆 ∈ 𝐴 ∧ ¬ 𝑆 ≤ 𝑊 ) ∧ ( 𝑇 ∈ 𝐴 ∧ ¬ 𝑇 ≤ 𝑊 ) ∧ ( 𝑉 ∈ 𝐴 ∧ 𝑉 ≤ 𝑊 ) ) ∧ ( 𝑆 ≠ 𝑇 ∧ 𝑆 ≤ ( 𝑇 ∨ 𝑉 ) ) ) → ( ( 𝑆 ∨ 𝑇 ) ∧ 𝑊 ) = 𝑉 ) |
| 58 | 57 | eqcomd | ⊢ ( ( ( 𝐾 ∈ HL ∧ 𝑊 ∈ 𝐻 ) ∧ ( ( 𝑆 ∈ 𝐴 ∧ ¬ 𝑆 ≤ 𝑊 ) ∧ ( 𝑇 ∈ 𝐴 ∧ ¬ 𝑇 ≤ 𝑊 ) ∧ ( 𝑉 ∈ 𝐴 ∧ 𝑉 ≤ 𝑊 ) ) ∧ ( 𝑆 ≠ 𝑇 ∧ 𝑆 ≤ ( 𝑇 ∨ 𝑉 ) ) ) → 𝑉 = ( ( 𝑆 ∨ 𝑇 ) ∧ 𝑊 ) ) |