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Description: Lemma for osumclN . (Contributed by NM, 24-Mar-2012) (New usage is discouraged.)
| Ref | Expression | ||
|---|---|---|---|
| Hypotheses | osumcllem.l | ⊢ ≤ = ( le ‘ 𝐾 ) | |
| osumcllem.j | ⊢ ∨ = ( join ‘ 𝐾 ) | ||
| osumcllem.a | ⊢ 𝐴 = ( Atoms ‘ 𝐾 ) | ||
| osumcllem.p | ⊢ + = ( +𝑃 ‘ 𝐾 ) | ||
| osumcllem.o | ⊢ ⊥ = ( ⊥𝑃 ‘ 𝐾 ) | ||
| osumcllem.c | ⊢ 𝐶 = ( PSubCl ‘ 𝐾 ) | ||
| osumcllem.m | ⊢ 𝑀 = ( 𝑋 + { 𝑝 } ) | ||
| osumcllem.u | ⊢ 𝑈 = ( ⊥ ‘ ( ⊥ ‘ ( 𝑋 + 𝑌 ) ) ) | ||
| Assertion | osumcllem9N | ⊢ ( ( ( 𝐾 ∈ HL ∧ 𝑋 ∈ 𝐶 ∧ 𝑌 ∈ 𝐶 ) ∧ ( 𝑋 ⊆ ( ⊥ ‘ 𝑌 ) ∧ 𝑋 ≠ ∅ ∧ 𝑝 ∈ 𝑈 ) ∧ ¬ 𝑝 ∈ ( 𝑋 + 𝑌 ) ) → 𝑀 = 𝑋 ) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | osumcllem.l | ⊢ ≤ = ( le ‘ 𝐾 ) | |
| 2 | osumcllem.j | ⊢ ∨ = ( join ‘ 𝐾 ) | |
| 3 | osumcllem.a | ⊢ 𝐴 = ( Atoms ‘ 𝐾 ) | |
| 4 | osumcllem.p | ⊢ + = ( +𝑃 ‘ 𝐾 ) | |
| 5 | osumcllem.o | ⊢ ⊥ = ( ⊥𝑃 ‘ 𝐾 ) | |
| 6 | osumcllem.c | ⊢ 𝐶 = ( PSubCl ‘ 𝐾 ) | |
| 7 | osumcllem.m | ⊢ 𝑀 = ( 𝑋 + { 𝑝 } ) | |
| 8 | osumcllem.u | ⊢ 𝑈 = ( ⊥ ‘ ( ⊥ ‘ ( 𝑋 + 𝑌 ) ) ) | |
| 9 | inass | ⊢ ( ( ( ⊥ ‘ 𝑋 ) ∩ 𝑈 ) ∩ 𝑀 ) = ( ( ⊥ ‘ 𝑋 ) ∩ ( 𝑈 ∩ 𝑀 ) ) | |
| 10 | simp11 | ⊢ ( ( ( 𝐾 ∈ HL ∧ 𝑋 ∈ 𝐶 ∧ 𝑌 ∈ 𝐶 ) ∧ ( 𝑋 ⊆ ( ⊥ ‘ 𝑌 ) ∧ 𝑋 ≠ ∅ ∧ 𝑝 ∈ 𝑈 ) ∧ ¬ 𝑝 ∈ ( 𝑋 + 𝑌 ) ) → 𝐾 ∈ HL ) | |
| 11 | simp13 | ⊢ ( ( ( 𝐾 ∈ HL ∧ 𝑋 ∈ 𝐶 ∧ 𝑌 ∈ 𝐶 ) ∧ ( 𝑋 ⊆ ( ⊥ ‘ 𝑌 ) ∧ 𝑋 ≠ ∅ ∧ 𝑝 ∈ 𝑈 ) ∧ ¬ 𝑝 ∈ ( 𝑋 + 𝑌 ) ) → 𝑌 ∈ 𝐶 ) | |
| 12 | simp21 | ⊢ ( ( ( 𝐾 ∈ HL ∧ 𝑋 ∈ 𝐶 ∧ 𝑌 ∈ 𝐶 ) ∧ ( 𝑋 ⊆ ( ⊥ ‘ 𝑌 ) ∧ 𝑋 ≠ ∅ ∧ 𝑝 ∈ 𝑈 ) ∧ ¬ 𝑝 ∈ ( 𝑋 + 𝑌 ) ) → 𝑋 ⊆ ( ⊥ ‘ 𝑌 ) ) | |
| 13 | 1 2 3 4 5 6 7 8 | osumcllem3N | ⊢ ( ( 𝐾 ∈ HL ∧ 𝑌 ∈ 𝐶 ∧ 𝑋 ⊆ ( ⊥ ‘ 𝑌 ) ) → ( ( ⊥ ‘ 𝑋 ) ∩ 𝑈 ) = 𝑌 ) |
| 14 | 10 11 12 13 | syl3anc | ⊢ ( ( ( 𝐾 ∈ HL ∧ 𝑋 ∈ 𝐶 ∧ 𝑌 ∈ 𝐶 ) ∧ ( 𝑋 ⊆ ( ⊥ ‘ 𝑌 ) ∧ 𝑋 ≠ ∅ ∧ 𝑝 ∈ 𝑈 ) ∧ ¬ 𝑝 ∈ ( 𝑋 + 𝑌 ) ) → ( ( ⊥ ‘ 𝑋 ) ∩ 𝑈 ) = 𝑌 ) |
| 15 | 14 | ineq1d | ⊢ ( ( ( 𝐾 ∈ HL ∧ 𝑋 ∈ 𝐶 ∧ 𝑌 ∈ 𝐶 ) ∧ ( 𝑋 ⊆ ( ⊥ ‘ 𝑌 ) ∧ 𝑋 ≠ ∅ ∧ 𝑝 ∈ 𝑈 ) ∧ ¬ 𝑝 ∈ ( 𝑋 + 𝑌 ) ) → ( ( ( ⊥ ‘ 𝑋 ) ∩ 𝑈 ) ∩ 𝑀 ) = ( 𝑌 ∩ 𝑀 ) ) |
| 16 | 9 15 | eqtr3id | ⊢ ( ( ( 𝐾 ∈ HL ∧ 𝑋 ∈ 𝐶 ∧ 𝑌 ∈ 𝐶 ) ∧ ( 𝑋 ⊆ ( ⊥ ‘ 𝑌 ) ∧ 𝑋 ≠ ∅ ∧ 𝑝 ∈ 𝑈 ) ∧ ¬ 𝑝 ∈ ( 𝑋 + 𝑌 ) ) → ( ( ⊥ ‘ 𝑋 ) ∩ ( 𝑈 ∩ 𝑀 ) ) = ( 𝑌 ∩ 𝑀 ) ) |
| 17 | simp12 | ⊢ ( ( ( 𝐾 ∈ HL ∧ 𝑋 ∈ 𝐶 ∧ 𝑌 ∈ 𝐶 ) ∧ ( 𝑋 ⊆ ( ⊥ ‘ 𝑌 ) ∧ 𝑋 ≠ ∅ ∧ 𝑝 ∈ 𝑈 ) ∧ ¬ 𝑝 ∈ ( 𝑋 + 𝑌 ) ) → 𝑋 ∈ 𝐶 ) | |
| 18 | 3 6 | psubclssatN | ⊢ ( ( 𝐾 ∈ HL ∧ 𝑋 ∈ 𝐶 ) → 𝑋 ⊆ 𝐴 ) |
| 19 | 10 17 18 | syl2anc | ⊢ ( ( ( 𝐾 ∈ HL ∧ 𝑋 ∈ 𝐶 ∧ 𝑌 ∈ 𝐶 ) ∧ ( 𝑋 ⊆ ( ⊥ ‘ 𝑌 ) ∧ 𝑋 ≠ ∅ ∧ 𝑝 ∈ 𝑈 ) ∧ ¬ 𝑝 ∈ ( 𝑋 + 𝑌 ) ) → 𝑋 ⊆ 𝐴 ) |
| 20 | 3 6 | psubclssatN | ⊢ ( ( 𝐾 ∈ HL ∧ 𝑌 ∈ 𝐶 ) → 𝑌 ⊆ 𝐴 ) |
| 21 | 10 11 20 | syl2anc | ⊢ ( ( ( 𝐾 ∈ HL ∧ 𝑋 ∈ 𝐶 ∧ 𝑌 ∈ 𝐶 ) ∧ ( 𝑋 ⊆ ( ⊥ ‘ 𝑌 ) ∧ 𝑋 ≠ ∅ ∧ 𝑝 ∈ 𝑈 ) ∧ ¬ 𝑝 ∈ ( 𝑋 + 𝑌 ) ) → 𝑌 ⊆ 𝐴 ) |
| 22 | simp22 | ⊢ ( ( ( 𝐾 ∈ HL ∧ 𝑋 ∈ 𝐶 ∧ 𝑌 ∈ 𝐶 ) ∧ ( 𝑋 ⊆ ( ⊥ ‘ 𝑌 ) ∧ 𝑋 ≠ ∅ ∧ 𝑝 ∈ 𝑈 ) ∧ ¬ 𝑝 ∈ ( 𝑋 + 𝑌 ) ) → 𝑋 ≠ ∅ ) | |
| 23 | 3 4 | paddssat | ⊢ ( ( 𝐾 ∈ HL ∧ 𝑋 ⊆ 𝐴 ∧ 𝑌 ⊆ 𝐴 ) → ( 𝑋 + 𝑌 ) ⊆ 𝐴 ) |
| 24 | 10 19 21 23 | syl3anc | ⊢ ( ( ( 𝐾 ∈ HL ∧ 𝑋 ∈ 𝐶 ∧ 𝑌 ∈ 𝐶 ) ∧ ( 𝑋 ⊆ ( ⊥ ‘ 𝑌 ) ∧ 𝑋 ≠ ∅ ∧ 𝑝 ∈ 𝑈 ) ∧ ¬ 𝑝 ∈ ( 𝑋 + 𝑌 ) ) → ( 𝑋 + 𝑌 ) ⊆ 𝐴 ) |
| 25 | 3 5 | polssatN | ⊢ ( ( 𝐾 ∈ HL ∧ ( 𝑋 + 𝑌 ) ⊆ 𝐴 ) → ( ⊥ ‘ ( 𝑋 + 𝑌 ) ) ⊆ 𝐴 ) |
| 26 | 10 24 25 | syl2anc | ⊢ ( ( ( 𝐾 ∈ HL ∧ 𝑋 ∈ 𝐶 ∧ 𝑌 ∈ 𝐶 ) ∧ ( 𝑋 ⊆ ( ⊥ ‘ 𝑌 ) ∧ 𝑋 ≠ ∅ ∧ 𝑝 ∈ 𝑈 ) ∧ ¬ 𝑝 ∈ ( 𝑋 + 𝑌 ) ) → ( ⊥ ‘ ( 𝑋 + 𝑌 ) ) ⊆ 𝐴 ) |
| 27 | 3 5 | polssatN | ⊢ ( ( 𝐾 ∈ HL ∧ ( ⊥ ‘ ( 𝑋 + 𝑌 ) ) ⊆ 𝐴 ) → ( ⊥ ‘ ( ⊥ ‘ ( 𝑋 + 𝑌 ) ) ) ⊆ 𝐴 ) |
| 28 | 10 26 27 | syl2anc | ⊢ ( ( ( 𝐾 ∈ HL ∧ 𝑋 ∈ 𝐶 ∧ 𝑌 ∈ 𝐶 ) ∧ ( 𝑋 ⊆ ( ⊥ ‘ 𝑌 ) ∧ 𝑋 ≠ ∅ ∧ 𝑝 ∈ 𝑈 ) ∧ ¬ 𝑝 ∈ ( 𝑋 + 𝑌 ) ) → ( ⊥ ‘ ( ⊥ ‘ ( 𝑋 + 𝑌 ) ) ) ⊆ 𝐴 ) |
| 29 | 8 28 | eqsstrid | ⊢ ( ( ( 𝐾 ∈ HL ∧ 𝑋 ∈ 𝐶 ∧ 𝑌 ∈ 𝐶 ) ∧ ( 𝑋 ⊆ ( ⊥ ‘ 𝑌 ) ∧ 𝑋 ≠ ∅ ∧ 𝑝 ∈ 𝑈 ) ∧ ¬ 𝑝 ∈ ( 𝑋 + 𝑌 ) ) → 𝑈 ⊆ 𝐴 ) |
| 30 | simp23 | ⊢ ( ( ( 𝐾 ∈ HL ∧ 𝑋 ∈ 𝐶 ∧ 𝑌 ∈ 𝐶 ) ∧ ( 𝑋 ⊆ ( ⊥ ‘ 𝑌 ) ∧ 𝑋 ≠ ∅ ∧ 𝑝 ∈ 𝑈 ) ∧ ¬ 𝑝 ∈ ( 𝑋 + 𝑌 ) ) → 𝑝 ∈ 𝑈 ) | |
| 31 | 29 30 | sseldd | ⊢ ( ( ( 𝐾 ∈ HL ∧ 𝑋 ∈ 𝐶 ∧ 𝑌 ∈ 𝐶 ) ∧ ( 𝑋 ⊆ ( ⊥ ‘ 𝑌 ) ∧ 𝑋 ≠ ∅ ∧ 𝑝 ∈ 𝑈 ) ∧ ¬ 𝑝 ∈ ( 𝑋 + 𝑌 ) ) → 𝑝 ∈ 𝐴 ) |
| 32 | simp3 | ⊢ ( ( ( 𝐾 ∈ HL ∧ 𝑋 ∈ 𝐶 ∧ 𝑌 ∈ 𝐶 ) ∧ ( 𝑋 ⊆ ( ⊥ ‘ 𝑌 ) ∧ 𝑋 ≠ ∅ ∧ 𝑝 ∈ 𝑈 ) ∧ ¬ 𝑝 ∈ ( 𝑋 + 𝑌 ) ) → ¬ 𝑝 ∈ ( 𝑋 + 𝑌 ) ) | |
| 33 | 1 2 3 4 5 6 7 8 | osumcllem8N | ⊢ ( ( ( 𝐾 ∈ HL ∧ 𝑋 ⊆ 𝐴 ∧ 𝑌 ⊆ 𝐴 ) ∧ ( 𝑋 ⊆ ( ⊥ ‘ 𝑌 ) ∧ 𝑋 ≠ ∅ ∧ 𝑝 ∈ 𝐴 ) ∧ ¬ 𝑝 ∈ ( 𝑋 + 𝑌 ) ) → ( 𝑌 ∩ 𝑀 ) = ∅ ) |
| 34 | 10 19 21 12 22 31 32 33 | syl331anc | ⊢ ( ( ( 𝐾 ∈ HL ∧ 𝑋 ∈ 𝐶 ∧ 𝑌 ∈ 𝐶 ) ∧ ( 𝑋 ⊆ ( ⊥ ‘ 𝑌 ) ∧ 𝑋 ≠ ∅ ∧ 𝑝 ∈ 𝑈 ) ∧ ¬ 𝑝 ∈ ( 𝑋 + 𝑌 ) ) → ( 𝑌 ∩ 𝑀 ) = ∅ ) |
| 35 | 16 34 | eqtrd | ⊢ ( ( ( 𝐾 ∈ HL ∧ 𝑋 ∈ 𝐶 ∧ 𝑌 ∈ 𝐶 ) ∧ ( 𝑋 ⊆ ( ⊥ ‘ 𝑌 ) ∧ 𝑋 ≠ ∅ ∧ 𝑝 ∈ 𝑈 ) ∧ ¬ 𝑝 ∈ ( 𝑋 + 𝑌 ) ) → ( ( ⊥ ‘ 𝑋 ) ∩ ( 𝑈 ∩ 𝑀 ) ) = ∅ ) |
| 36 | 35 | fveq2d | ⊢ ( ( ( 𝐾 ∈ HL ∧ 𝑋 ∈ 𝐶 ∧ 𝑌 ∈ 𝐶 ) ∧ ( 𝑋 ⊆ ( ⊥ ‘ 𝑌 ) ∧ 𝑋 ≠ ∅ ∧ 𝑝 ∈ 𝑈 ) ∧ ¬ 𝑝 ∈ ( 𝑋 + 𝑌 ) ) → ( ⊥ ‘ ( ( ⊥ ‘ 𝑋 ) ∩ ( 𝑈 ∩ 𝑀 ) ) ) = ( ⊥ ‘ ∅ ) ) |
| 37 | 3 5 | pol0N | ⊢ ( 𝐾 ∈ HL → ( ⊥ ‘ ∅ ) = 𝐴 ) |
| 38 | 10 37 | syl | ⊢ ( ( ( 𝐾 ∈ HL ∧ 𝑋 ∈ 𝐶 ∧ 𝑌 ∈ 𝐶 ) ∧ ( 𝑋 ⊆ ( ⊥ ‘ 𝑌 ) ∧ 𝑋 ≠ ∅ ∧ 𝑝 ∈ 𝑈 ) ∧ ¬ 𝑝 ∈ ( 𝑋 + 𝑌 ) ) → ( ⊥ ‘ ∅ ) = 𝐴 ) |
| 39 | 36 38 | eqtrd | ⊢ ( ( ( 𝐾 ∈ HL ∧ 𝑋 ∈ 𝐶 ∧ 𝑌 ∈ 𝐶 ) ∧ ( 𝑋 ⊆ ( ⊥ ‘ 𝑌 ) ∧ 𝑋 ≠ ∅ ∧ 𝑝 ∈ 𝑈 ) ∧ ¬ 𝑝 ∈ ( 𝑋 + 𝑌 ) ) → ( ⊥ ‘ ( ( ⊥ ‘ 𝑋 ) ∩ ( 𝑈 ∩ 𝑀 ) ) ) = 𝐴 ) |
| 40 | 1 2 3 4 5 6 7 8 | osumcllem1N | ⊢ ( ( ( 𝐾 ∈ HL ∧ 𝑋 ⊆ 𝐴 ∧ 𝑌 ⊆ 𝐴 ) ∧ 𝑝 ∈ 𝑈 ) → ( 𝑈 ∩ 𝑀 ) = 𝑀 ) |
| 41 | 10 19 21 30 40 | syl31anc | ⊢ ( ( ( 𝐾 ∈ HL ∧ 𝑋 ∈ 𝐶 ∧ 𝑌 ∈ 𝐶 ) ∧ ( 𝑋 ⊆ ( ⊥ ‘ 𝑌 ) ∧ 𝑋 ≠ ∅ ∧ 𝑝 ∈ 𝑈 ) ∧ ¬ 𝑝 ∈ ( 𝑋 + 𝑌 ) ) → ( 𝑈 ∩ 𝑀 ) = 𝑀 ) |
| 42 | 39 41 | ineq12d | ⊢ ( ( ( 𝐾 ∈ HL ∧ 𝑋 ∈ 𝐶 ∧ 𝑌 ∈ 𝐶 ) ∧ ( 𝑋 ⊆ ( ⊥ ‘ 𝑌 ) ∧ 𝑋 ≠ ∅ ∧ 𝑝 ∈ 𝑈 ) ∧ ¬ 𝑝 ∈ ( 𝑋 + 𝑌 ) ) → ( ( ⊥ ‘ ( ( ⊥ ‘ 𝑋 ) ∩ ( 𝑈 ∩ 𝑀 ) ) ) ∩ ( 𝑈 ∩ 𝑀 ) ) = ( 𝐴 ∩ 𝑀 ) ) |
| 43 | 3 5 6 | polsubclN | ⊢ ( ( 𝐾 ∈ HL ∧ ( ⊥ ‘ ( 𝑋 + 𝑌 ) ) ⊆ 𝐴 ) → ( ⊥ ‘ ( ⊥ ‘ ( 𝑋 + 𝑌 ) ) ) ∈ 𝐶 ) |
| 44 | 10 26 43 | syl2anc | ⊢ ( ( ( 𝐾 ∈ HL ∧ 𝑋 ∈ 𝐶 ∧ 𝑌 ∈ 𝐶 ) ∧ ( 𝑋 ⊆ ( ⊥ ‘ 𝑌 ) ∧ 𝑋 ≠ ∅ ∧ 𝑝 ∈ 𝑈 ) ∧ ¬ 𝑝 ∈ ( 𝑋 + 𝑌 ) ) → ( ⊥ ‘ ( ⊥ ‘ ( 𝑋 + 𝑌 ) ) ) ∈ 𝐶 ) |
| 45 | 8 44 | eqeltrid | ⊢ ( ( ( 𝐾 ∈ HL ∧ 𝑋 ∈ 𝐶 ∧ 𝑌 ∈ 𝐶 ) ∧ ( 𝑋 ⊆ ( ⊥ ‘ 𝑌 ) ∧ 𝑋 ≠ ∅ ∧ 𝑝 ∈ 𝑈 ) ∧ ¬ 𝑝 ∈ ( 𝑋 + 𝑌 ) ) → 𝑈 ∈ 𝐶 ) |
| 46 | 3 4 6 | paddatclN | ⊢ ( ( 𝐾 ∈ HL ∧ 𝑋 ∈ 𝐶 ∧ 𝑝 ∈ 𝐴 ) → ( 𝑋 + { 𝑝 } ) ∈ 𝐶 ) |
| 47 | 10 17 31 46 | syl3anc | ⊢ ( ( ( 𝐾 ∈ HL ∧ 𝑋 ∈ 𝐶 ∧ 𝑌 ∈ 𝐶 ) ∧ ( 𝑋 ⊆ ( ⊥ ‘ 𝑌 ) ∧ 𝑋 ≠ ∅ ∧ 𝑝 ∈ 𝑈 ) ∧ ¬ 𝑝 ∈ ( 𝑋 + 𝑌 ) ) → ( 𝑋 + { 𝑝 } ) ∈ 𝐶 ) |
| 48 | 7 47 | eqeltrid | ⊢ ( ( ( 𝐾 ∈ HL ∧ 𝑋 ∈ 𝐶 ∧ 𝑌 ∈ 𝐶 ) ∧ ( 𝑋 ⊆ ( ⊥ ‘ 𝑌 ) ∧ 𝑋 ≠ ∅ ∧ 𝑝 ∈ 𝑈 ) ∧ ¬ 𝑝 ∈ ( 𝑋 + 𝑌 ) ) → 𝑀 ∈ 𝐶 ) |
| 49 | 6 | psubclinN | ⊢ ( ( 𝐾 ∈ HL ∧ 𝑈 ∈ 𝐶 ∧ 𝑀 ∈ 𝐶 ) → ( 𝑈 ∩ 𝑀 ) ∈ 𝐶 ) |
| 50 | 10 45 48 49 | syl3anc | ⊢ ( ( ( 𝐾 ∈ HL ∧ 𝑋 ∈ 𝐶 ∧ 𝑌 ∈ 𝐶 ) ∧ ( 𝑋 ⊆ ( ⊥ ‘ 𝑌 ) ∧ 𝑋 ≠ ∅ ∧ 𝑝 ∈ 𝑈 ) ∧ ¬ 𝑝 ∈ ( 𝑋 + 𝑌 ) ) → ( 𝑈 ∩ 𝑀 ) ∈ 𝐶 ) |
| 51 | 1 2 3 4 5 6 7 8 | osumcllem2N | ⊢ ( ( ( 𝐾 ∈ HL ∧ 𝑋 ⊆ 𝐴 ∧ 𝑌 ⊆ 𝐴 ) ∧ 𝑝 ∈ 𝑈 ) → 𝑋 ⊆ ( 𝑈 ∩ 𝑀 ) ) |
| 52 | 10 19 21 30 51 | syl31anc | ⊢ ( ( ( 𝐾 ∈ HL ∧ 𝑋 ∈ 𝐶 ∧ 𝑌 ∈ 𝐶 ) ∧ ( 𝑋 ⊆ ( ⊥ ‘ 𝑌 ) ∧ 𝑋 ≠ ∅ ∧ 𝑝 ∈ 𝑈 ) ∧ ¬ 𝑝 ∈ ( 𝑋 + 𝑌 ) ) → 𝑋 ⊆ ( 𝑈 ∩ 𝑀 ) ) |
| 53 | 6 5 | poml6N | ⊢ ( ( ( 𝐾 ∈ HL ∧ 𝑋 ∈ 𝐶 ∧ ( 𝑈 ∩ 𝑀 ) ∈ 𝐶 ) ∧ 𝑋 ⊆ ( 𝑈 ∩ 𝑀 ) ) → ( ( ⊥ ‘ ( ( ⊥ ‘ 𝑋 ) ∩ ( 𝑈 ∩ 𝑀 ) ) ) ∩ ( 𝑈 ∩ 𝑀 ) ) = 𝑋 ) |
| 54 | 10 17 50 52 53 | syl31anc | ⊢ ( ( ( 𝐾 ∈ HL ∧ 𝑋 ∈ 𝐶 ∧ 𝑌 ∈ 𝐶 ) ∧ ( 𝑋 ⊆ ( ⊥ ‘ 𝑌 ) ∧ 𝑋 ≠ ∅ ∧ 𝑝 ∈ 𝑈 ) ∧ ¬ 𝑝 ∈ ( 𝑋 + 𝑌 ) ) → ( ( ⊥ ‘ ( ( ⊥ ‘ 𝑋 ) ∩ ( 𝑈 ∩ 𝑀 ) ) ) ∩ ( 𝑈 ∩ 𝑀 ) ) = 𝑋 ) |
| 55 | 31 | snssd | ⊢ ( ( ( 𝐾 ∈ HL ∧ 𝑋 ∈ 𝐶 ∧ 𝑌 ∈ 𝐶 ) ∧ ( 𝑋 ⊆ ( ⊥ ‘ 𝑌 ) ∧ 𝑋 ≠ ∅ ∧ 𝑝 ∈ 𝑈 ) ∧ ¬ 𝑝 ∈ ( 𝑋 + 𝑌 ) ) → { 𝑝 } ⊆ 𝐴 ) |
| 56 | 3 4 | paddssat | ⊢ ( ( 𝐾 ∈ HL ∧ 𝑋 ⊆ 𝐴 ∧ { 𝑝 } ⊆ 𝐴 ) → ( 𝑋 + { 𝑝 } ) ⊆ 𝐴 ) |
| 57 | 10 19 55 56 | syl3anc | ⊢ ( ( ( 𝐾 ∈ HL ∧ 𝑋 ∈ 𝐶 ∧ 𝑌 ∈ 𝐶 ) ∧ ( 𝑋 ⊆ ( ⊥ ‘ 𝑌 ) ∧ 𝑋 ≠ ∅ ∧ 𝑝 ∈ 𝑈 ) ∧ ¬ 𝑝 ∈ ( 𝑋 + 𝑌 ) ) → ( 𝑋 + { 𝑝 } ) ⊆ 𝐴 ) |
| 58 | 7 57 | eqsstrid | ⊢ ( ( ( 𝐾 ∈ HL ∧ 𝑋 ∈ 𝐶 ∧ 𝑌 ∈ 𝐶 ) ∧ ( 𝑋 ⊆ ( ⊥ ‘ 𝑌 ) ∧ 𝑋 ≠ ∅ ∧ 𝑝 ∈ 𝑈 ) ∧ ¬ 𝑝 ∈ ( 𝑋 + 𝑌 ) ) → 𝑀 ⊆ 𝐴 ) |
| 59 | sseqin2 | ⊢ ( 𝑀 ⊆ 𝐴 ↔ ( 𝐴 ∩ 𝑀 ) = 𝑀 ) | |
| 60 | 58 59 | sylib | ⊢ ( ( ( 𝐾 ∈ HL ∧ 𝑋 ∈ 𝐶 ∧ 𝑌 ∈ 𝐶 ) ∧ ( 𝑋 ⊆ ( ⊥ ‘ 𝑌 ) ∧ 𝑋 ≠ ∅ ∧ 𝑝 ∈ 𝑈 ) ∧ ¬ 𝑝 ∈ ( 𝑋 + 𝑌 ) ) → ( 𝐴 ∩ 𝑀 ) = 𝑀 ) |
| 61 | 42 54 60 | 3eqtr3rd | ⊢ ( ( ( 𝐾 ∈ HL ∧ 𝑋 ∈ 𝐶 ∧ 𝑌 ∈ 𝐶 ) ∧ ( 𝑋 ⊆ ( ⊥ ‘ 𝑌 ) ∧ 𝑋 ≠ ∅ ∧ 𝑝 ∈ 𝑈 ) ∧ ¬ 𝑝 ∈ ( 𝑋 + 𝑌 ) ) → 𝑀 = 𝑋 ) |