Proof of Theorem sumdmd
| Step | Hyp | Ref
| Expression |
| 1 | | sumdmdi.1 |
. . 3
⊢ A
∈ Cℋ |
| 2 | | sumdmdi.2 |
. . 3
⊢ B
∈ Cℋ |
| 3 | 1, 2 | sumdmdi 5785 |
. 2
⊢ ((A
+ℋ B) = (A ∨ℋ B) → (⊥ ‘A) Mℋ (⊥
‘B)) |
| 4 | | spansnsht 5466 |
. . . . . . . . . . . . . 14
⊢ (x
∈ ℋ → (span ‘{x})
∈ Sℋ ) |
| 5 | 2 | chshi 5132 |
. . . . . . . . . . . . . . 15
⊢ B
∈ Sℋ |
| 6 | | shsub2t 5290 |
. . . . . . . . . . . . . . 15
⊢ (((span ‘{x}) ∈ Sℋ ∧ B ∈ Sℋ ) → (span
‘{x}) ⊆ (B +ℋ (span ‘{x}))) |
| 7 | 5, 6 | mpan2 519 |
. . . . . . . . . . . . . 14
⊢ ((span ‘{x}) ∈ Sℋ → (span
‘{x}) ⊆ (B +ℋ (span ‘{x}))) |
| 8 | 4, 7 | syl 12 |
. . . . . . . . . . . . 13
⊢ (x
∈ ℋ → (span ‘{x})
⊆ (B +ℋ (span
‘{x}))) |
| 9 | | spansnid 5468 |
. . . . . . . . . . . . 13
⊢ (x
∈ ℋ → x ∈ (span
‘{x})) |
| 10 | 8, 9 | sseldd 1507 |
. . . . . . . . . . . 12
⊢ (x
∈ ℋ → x ∈ (B +ℋ (span ‘{x}))) |
| 11 | 10 | ad2antrl 322 |
. . . . . . . . . . 11
⊢ (((⊥ ‘A) Mℋ (⊥
‘B) ∧ (x ∈ ℋ ∧ ¬ x ∈ (A
+ℋ B))) → x ∈ (B
+ℋ (span ‘{x}))) |
| 12 | | shsub1t 5289 |
. . . . . . . . . . . . . . . . . . . 20
⊢ ((B
∈ Sℋ ∧ (span ‘{x}) ∈ Sℋ ) →
B ⊆ (B +ℋ (span ‘{x}))) |
| 13 | 5, 12 | mpan 518 |
. . . . . . . . . . . . . . . . . . 19
⊢ ((span ‘{x}) ∈ Sℋ →
B ⊆ (B +ℋ (span ‘{x}))) |
| 14 | 4, 13 | syl 12 |
. . . . . . . . . . . . . . . . . 18
⊢ (x
∈ ℋ → B ⊆ (B +ℋ (span ‘{x}))) |
| 15 | | spansnsclt 5541 |
. . . . . . . . . . . . . . . . . . . 20
⊢ ((B
∈ Cℋ ∧ x
∈ ℋ ) → (B
+ℋ (span ‘{x}))
∈ Cℋ ) |
| 16 | 2, 15 | mpan 518 |
. . . . . . . . . . . . . . . . . . 19
⊢ (x
∈ ℋ → (B
+ℋ (span ‘{x}))
∈ Cℋ ) |
| 17 | | dmdi 5732 |
. . . . . . . . . . . . . . . . . . . . 21
⊢ ((A
∈ Cℋ ∧ B
∈ Cℋ ∧ (B
+ℋ (span ‘{x}))
∈ Cℋ ) → ((⊥ ‘A) Mℋ (⊥
‘B) → (B ⊆ (B
+ℋ (span ‘{x}))
→ (((B +ℋ (span
‘{x})) ∩ A) ∨ℋ B) = ((B
+ℋ (span ‘{x}))
∩ (A ∨ℋ B))))) |
| 18 | 1, 17 | mp3an1 639 |
. . . . . . . . . . . . . . . . . . . 20
⊢ ((B
∈ Cℋ ∧ (B
+ℋ (span ‘{x}))
∈ Cℋ ) → ((⊥ ‘A) Mℋ (⊥
‘B) → (B ⊆ (B
+ℋ (span ‘{x}))
→ (((B +ℋ (span
‘{x})) ∩ A) ∨ℋ B) = ((B
+ℋ (span ‘{x}))
∩ (A ∨ℋ B))))) |
| 19 | 2, 18 | mpan 518 |
. . . . . . . . . . . . . . . . . . 19
⊢ ((B
+ℋ (span ‘{x}))
∈ Cℋ → ((⊥ ‘A) Mℋ (⊥
‘B) → (B ⊆ (B
+ℋ (span ‘{x}))
→ (((B +ℋ (span
‘{x})) ∩ A) ∨ℋ B) = ((B
+ℋ (span ‘{x}))
∩ (A ∨ℋ B))))) |
| 20 | 16, 19 | syl 12 |
. . . . . . . . . . . . . . . . . 18
⊢ (x
∈ ℋ → ((⊥ ‘A)
Mℋ (⊥ ‘B) → (B
⊆ (B +ℋ (span
‘{x})) → (((B +ℋ (span ‘{x})) ∩ A)
∨ℋ B) = ((B +ℋ (span ‘{x})) ∩ (A
∨ℋ B))))) |
| 21 | 14, 20 | mpid 48 |
. . . . . . . . . . . . . . . . 17
⊢ (x
∈ ℋ → ((⊥ ‘A)
Mℋ (⊥ ‘B) → (((B
+ℋ (span ‘{x}))
∩ A) ∨ℋ B) = ((B
+ℋ (span ‘{x}))
∩ (A ∨ℋ B)))) |
| 22 | 21 | com12 13 |
. . . . . . . . . . . . . . . 16
⊢ ((⊥ ‘A) Mℋ (⊥
‘B) → (x ∈ ℋ → (((B +ℋ (span ‘{x})) ∩ A)
∨ℋ B) = ((B +ℋ (span ‘{x})) ∩ (A
∨ℋ B)))) |
| 23 | 22 | imp 277 |
. . . . . . . . . . . . . . 15
⊢ (((⊥ ‘A) Mℋ (⊥
‘B) ∧ x ∈ ℋ ) → (((B +ℋ (span ‘{x})) ∩ A)
∨ℋ B) = ((B +ℋ (span ‘{x})) ∩ (A
∨ℋ B))) |
| 24 | 23 | adantrr 312 |
. . . . . . . . . . . . . 14
⊢ (((⊥ ‘A) Mℋ (⊥
‘B) ∧ (x ∈ ℋ ∧ ¬ x ∈ (A
+ℋ B))) → (((B +ℋ (span ‘{x})) ∩ A)
∨ℋ B) = ((B +ℋ (span ‘{x})) ∩ (A
∨ℋ B))) |
| 25 | 1 | chshi 5132 |
. . . . . . . . . . . . . . . . 17
⊢ A
∈ Sℋ |
| 26 | 5, 25 | shsub2 5343 |
. . . . . . . . . . . . . . . 16
⊢ B
⊆ (A +ℋ B) |
| 27 | 1, 2 | sumdmdlem 5786 |
. . . . . . . . . . . . . . . . . . 19
⊢ ((x
∈ ℋ ∧ ¬ x ∈
(A +ℋ B)) → ((B
+ℋ (span ‘{x}))
∩ A) = (B ∩ A)) |
| 28 | 27 | opreq1d 3012 |
. . . . . . . . . . . . . . . . . 18
⊢ ((x
∈ ℋ ∧ ¬ x ∈
(A +ℋ B)) → (((B
+ℋ (span ‘{x}))
∩ A) ∨ℋ B) = ((B ∩
A) ∨ℋ B)) |
| 29 | 2, 1 | chincl 5382 |
. . . . . . . . . . . . . . . . . . . 20
⊢ (B
∩ A) ∈
Cℋ |
| 30 | 29, 2 | chjcom 5389 |
. . . . . . . . . . . . . . . . . . 19
⊢ ((B
∩ A) ∨ℋ B) = (B
∨ℋ (B ∩ A)) |
| 31 | 2, 1 | chabs1 5434 |
. . . . . . . . . . . . . . . . . . 19
⊢ (B
∨ℋ (B ∩ A)) = B |
| 32 | 30, 31 | eqtr 1119 |
. . . . . . . . . . . . . . . . . 18
⊢ ((B
∩ A) ∨ℋ B) = B |
| 33 | 28, 32 | syl6eq 1140 |
. . . . . . . . . . . . . . . . 17
⊢ ((x
∈ ℋ ∧ ¬ x ∈
(A +ℋ B)) → (((B
+ℋ (span ‘{x}))
∩ A) ∨ℋ B) = B) |
| 34 | 33 | sseq1d 1527 |
. . . . . . . . . . . . . . . 16
⊢ ((x
∈ ℋ ∧ ¬ x ∈
(A +ℋ B)) → ((((B
+ℋ (span ‘{x}))
∩ A) ∨ℋ B) ⊆ (A
+ℋ B) ↔ B ⊆ (A
+ℋ B))) |
| 35 | 26, 34 | mpbiri 169 |
. . . . . . . . . . . . . . 15
⊢ ((x
∈ ℋ ∧ ¬ x ∈
(A +ℋ B)) → (((B
+ℋ (span ‘{x}))
∩ A) ∨ℋ B) ⊆ (A
+ℋ B)) |
| 36 | 35 | adantl 305 |
. . . . . . . . . . . . . 14
⊢ (((⊥ ‘A) Mℋ (⊥
‘B) ∧ (x ∈ ℋ ∧ ¬ x ∈ (A
+ℋ B))) → (((B +ℋ (span ‘{x})) ∩ A)
∨ℋ B) ⊆ (A +ℋ B)) |
| 37 | 24, 36 | eqsstr3d 1535 |
. . . . . . . . . . . . 13
⊢ (((⊥ ‘A) Mℋ (⊥
‘B) ∧ (x ∈ ℋ ∧ ¬ x ∈ (A
+ℋ B))) → ((B +ℋ (span ‘{x})) ∩ (A
∨ℋ B)) ⊆
(A +ℋ B)) |
| 38 | 37 | sseld 1506 |
. . . . . . . . . . . 12
⊢ (((⊥ ‘A) Mℋ (⊥
‘B) ∧ (x ∈ ℋ ∧ ¬ x ∈ (A
+ℋ B))) → (x ∈ ((B
+ℋ (span ‘{x}))
∩ (A ∨ℋ B)) → x
∈ (A +ℋ B))) |
| 39 | | elin 1635 |
. . . . . . . . . . . 12
⊢ (x
∈ ((B +ℋ (span
‘{x})) ∩ (A ∨ℋ B)) ↔ (x
∈ (B +ℋ (span
‘{x})) ∧ x ∈ (A
∨ℋ B))) |
| 40 | 38, 39 | syl5ibr 182 |
. . . . . . . . . . 11
⊢ (((⊥ ‘A) Mℋ (⊥
‘B) ∧ (x ∈ ℋ ∧ ¬ x ∈ (A
+ℋ B))) → ((x ∈ (B
+ℋ (span ‘{x}))
∧ x ∈ (A ∨ℋ B)) → x
∈ (A +ℋ B))) |
| 41 | 11, 40 | mpand 524 |
. . . . . . . . . 10
⊢ (((⊥ ‘A) Mℋ (⊥
‘B) ∧ (x ∈ ℋ ∧ ¬ x ∈ (A
+ℋ B))) → (x ∈ (A
∨ℋ B) → x ∈ (A
+ℋ B))) |
| 42 | 41 | exp32 294 |
. . . . . . . . 9
⊢ ((⊥ ‘A) Mℋ (⊥
‘B) → (x ∈ ℋ → (¬ x ∈ (A
+ℋ B) → (x ∈ (A
∨ℋ B) → x ∈ (A
+ℋ B))))) |
| 43 | 42 | com34 36 |
. . . . . . . 8
⊢ ((⊥ ‘A) Mℋ (⊥
‘B) → (x ∈ ℋ → (x ∈ (A
∨ℋ B) → (¬
x ∈ (A +ℋ B) → x
∈ (A +ℋ B))))) |
| 44 | | pm2.18 75 |
. . . . . . . 8
⊢ ((¬ x ∈ (A
+ℋ B) → x ∈ (A
+ℋ B)) → x ∈ (A
+ℋ B)) |
| 45 | 43, 44 | syl8 25 |
. . . . . . 7
⊢ ((⊥ ‘A) Mℋ (⊥
‘B) → (x ∈ ℋ → (x ∈ (A
∨ℋ B) → x ∈ (A
+ℋ B)))) |
| 46 | 1, 2 | chjcl 5379 |
. . . . . . . 8
⊢ (A
∨ℋ B) ∈
Cℋ |
| 47 | 46 | chel 5137 |
. . . . . . 7
⊢ (x
∈ (A ∨ℋ B) → x
∈ ℋ ) |
| 48 | 45, 47 | syl5 22 |
. . . . . 6
⊢ ((⊥ ‘A) Mℋ (⊥
‘B) → (x ∈ (A
∨ℋ B) → (x ∈ (A
∨ℋ B) → x ∈ (A
+ℋ B)))) |
| 49 | 48 | pm2.43d 59 |
. . . . 5
⊢ ((⊥ ‘A) Mℋ (⊥
‘B) → (x ∈ (A
∨ℋ B) → x ∈ (A
+ℋ B))) |
| 50 | 49 | ssrdv 1509 |
. . . 4
⊢ ((⊥ ‘A) Mℋ (⊥
‘B) → (A ∨ℋ B) ⊆ (A
+ℋ B)) |
| 51 | 1, 2 | chslej 5380 |
. . . 4
⊢ (A
+ℋ B) ⊆ (A ∨ℋ B) |
| 52 | 50, 51 | jctil 240 |
. . 3
⊢ ((⊥ ‘A) Mℋ (⊥
‘B) → ((A +ℋ B) ⊆ (A
∨ℋ B) ∧ (A ∨ℋ B) ⊆ (A
+ℋ B))) |
| 53 | | eqss 1516 |
. . 3
⊢ ((A
+ℋ B) = (A ∨ℋ B) ↔ ((A
+ℋ B) ⊆ (A ∨ℋ B) ∧ (A
∨ℋ B) ⊆ (A +ℋ B))) |
| 54 | 52, 53 | sylibr 175 |
. 2
⊢ ((⊥ ‘A) Mℋ (⊥
‘B) → (A +ℋ B) = (A
∨ℋ B)) |
| 55 | 3, 54 | impbi 139 |
1
⊢ ((A
+ℋ B) = (A ∨ℋ B) ↔ (⊥ ‘A) Mℋ (⊥
‘B)) |