Proof of Theorem elspansn2t
| Step | Hyp | Ref
| Expression |
| 1 | | spansnt 5464 |
. . . . 5
⊢ (B
∈ ℋ → (span ‘{B}) =
(⊥ ‘(⊥ ‘{B}))) |
| 2 | 1 | eleq2d 1156 |
. . . 4
⊢ (B
∈ ℋ → (A ∈ (span
‘{B}) ↔ A ∈ (⊥ ‘(⊥ ‘{B})))) |
| 3 | 2 | adantl 305 |
. . 3
⊢ ((A
∈ ℋ ∧ B ∈ ℋ )
→ (A ∈ (span ‘{B}) ↔ A
∈ (⊥ ‘(⊥ ‘{B})))) |
| 4 | 3 | 3adant3 599 |
. 2
⊢ ((A
∈ ℋ ∧ B ∈ ℋ ∧
¬ B = 0v) →
(A ∈ (span ‘{B}) ↔ A
∈ (⊥ ‘(⊥ ‘{B})))) |
| 5 | | eleq1 1149 |
. . . . . . 7
⊢ (A =
if(A ∈ ℋ , A, 0v) → (A ∈ (⊥ ‘(⊥ ‘{B})) ↔ if(A
∈ ℋ , A, 0v)
∈ (⊥ ‘(⊥ ‘{B})))) |
| 6 | | id 9 |
. . . . . . . 8
⊢ (A =
if(A ∈ ℋ , A, 0v) → A = if(A ∈
ℋ , A,
0v)) |
| 7 | | opreq1 3006 |
. . . . . . . . . 10
⊢ (A =
if(A ∈ ℋ , A, 0v) → (A ·i B) = (if(A
∈ ℋ , A, 0v)
·i B)) |
| 8 | 7 | opreq1d 3012 |
. . . . . . . . 9
⊢ (A =
if(A ∈ ℋ , A, 0v) → ((A ·i B) / (B
·i B)) =
((if(A ∈ ℋ , A, 0v)
·i B) /
(B ·i
B))) |
| 9 | 8 | opreq1d 3012 |
. . . . . . . 8
⊢ (A =
if(A ∈ ℋ , A, 0v) → (((A ·i B) / (B
·i B))
·s B) =
(((if(A ∈ ℋ , A, 0v)
·i B) /
(B ·i
B)) ·s
B)) |
| 10 | 6, 9 | cleq12d 1115 |
. . . . . . 7
⊢ (A =
if(A ∈ ℋ , A, 0v) → (A = (((A
·i B) /
(B ·i
B)) ·s
B) ↔ if(A ∈ ℋ , A, 0v) = (((if(A ∈ ℋ , A, 0v)
·i B) /
(B ·i
B)) ·s
B))) |
| 11 | 5, 10 | bibi12d 477 |
. . . . . 6
⊢ (A =
if(A ∈ ℋ , A, 0v) → ((A ∈ (⊥ ‘(⊥ ‘{B})) ↔ A =
(((A ·i
B) / (B
·i B))
·s B))
↔ (if(A ∈ ℋ , A, 0v) ∈ (⊥
‘(⊥ ‘{B})) ↔
if(A ∈ ℋ , A, 0v) = (((if(A ∈ ℋ , A, 0v)
·i B) /
(B ·i
B)) ·s
B)))) |
| 12 | 11 | imbi2d 464 |
. . . . 5
⊢ (A =
if(A ∈ ℋ , A, 0v) → ((¬ B = 0v → (A ∈ (⊥ ‘(⊥ ‘{B})) ↔ A =
(((A ·i
B) / (B
·i B))
·s B)))
↔ (¬ B = 0v
→ (if(A ∈ ℋ , A, 0v) ∈ (⊥
‘(⊥ ‘{B})) ↔
if(A ∈ ℋ , A, 0v) = (((if(A ∈ ℋ , A, 0v)
·i B) /
(B ·i
B)) ·s
B))))) |
| 13 | | cleq1 1107 |
. . . . . . 7
⊢ (B =
if(B ∈ ℋ , B, 0v) → (B = 0v ↔ if(B ∈ ℋ , B, 0v) =
0v)) |
| 14 | 13 | negbid 463 |
. . . . . 6
⊢ (B =
if(B ∈ ℋ , B, 0v) → (¬ B = 0v ↔ ¬ if(B ∈ ℋ , B, 0v) =
0v)) |
| 15 | | sneq 1816 |
. . . . . . . . . 10
⊢ (B =
if(B ∈ ℋ , B, 0v) → {B} = {if(B
∈ ℋ , B,
0v)}) |
| 16 | 15 | fveq2d 2836 |
. . . . . . . . 9
⊢ (B =
if(B ∈ ℋ , B, 0v) → (⊥
‘{B}) = (⊥ ‘{if(B ∈ ℋ , B, 0v)})) |
| 17 | 16 | fveq2d 2836 |
. . . . . . . 8
⊢ (B =
if(B ∈ ℋ , B, 0v) → (⊥
‘(⊥ ‘{B})) = (⊥
‘(⊥ ‘{if(B ∈ ℋ
, B, 0v)}))) |
| 18 | 17 | eleq2d 1156 |
. . . . . . 7
⊢ (B =
if(B ∈ ℋ , B, 0v) → (if(A ∈ ℋ , A, 0v) ∈ (⊥
‘(⊥ ‘{B})) ↔
if(A ∈ ℋ , A, 0v) ∈ (⊥
‘(⊥ ‘{if(B ∈ ℋ
, B, 0v)})))) |
| 19 | | opreq2 3007 |
. . . . . . . . . 10
⊢ (B =
if(B ∈ ℋ , B, 0v) → (if(A ∈ ℋ , A, 0v)
·i B) =
(if(A ∈ ℋ , A, 0v)
·i if(B
∈ ℋ , B,
0v))) |
| 20 | | opreq1 3006 |
. . . . . . . . . . 11
⊢ (B =
if(B ∈ ℋ , B, 0v) → (B ·i B) = (if(B
∈ ℋ , B, 0v)
·i B)) |
| 21 | | opreq2 3007 |
. . . . . . . . . . 11
⊢ (B =
if(B ∈ ℋ , B, 0v) → (if(B ∈ ℋ , B, 0v)
·i B) =
(if(B ∈ ℋ , B, 0v)
·i if(B
∈ ℋ , B,
0v))) |
| 22 | 20, 21 | eqtrd 1128 |
. . . . . . . . . 10
⊢ (B =
if(B ∈ ℋ , B, 0v) → (B ·i B) = (if(B
∈ ℋ , B, 0v)
·i if(B
∈ ℋ , B,
0v))) |
| 23 | 19, 22 | opreq12d 3014 |
. . . . . . . . 9
⊢ (B =
if(B ∈ ℋ , B, 0v) → ((if(A ∈ ℋ , A, 0v)
·i B) /
(B ·i
B)) = ((if(A ∈ ℋ , A, 0v)
·i if(B
∈ ℋ , B, 0v))
/ (if(B ∈ ℋ , B, 0v)
·i if(B
∈ ℋ , B,
0v)))) |
| 24 | | id 9 |
. . . . . . . . 9
⊢ (B =
if(B ∈ ℋ , B, 0v) → B = if(B ∈
ℋ , B,
0v)) |
| 25 | 23, 24 | opreq12d 3014 |
. . . . . . . 8
⊢ (B =
if(B ∈ ℋ , B, 0v) → (((if(A ∈ ℋ , A, 0v)
·i B) /
(B ·i
B)) ·s
B) = (((if(A ∈ ℋ , A, 0v)
·i if(B
∈ ℋ , B, 0v))
/ (if(B ∈ ℋ , B, 0v)
·i if(B
∈ ℋ , B, 0v)))
·s if(B
∈ ℋ , B,
0v))) |
| 26 | 25 | cleq2d 1112 |
. . . . . . 7
⊢ (B =
if(B ∈ ℋ , B, 0v) → (if(A ∈ ℋ , A, 0v) = (((if(A ∈ ℋ , A, 0v)
·i B) /
(B ·i
B)) ·s
B) ↔ if(A ∈ ℋ , A, 0v) = (((if(A ∈ ℋ , A, 0v)
·i if(B
∈ ℋ , B, 0v))
/ (if(B ∈ ℋ , B, 0v)
·i if(B
∈ ℋ , B, 0v)))
·s if(B
∈ ℋ , B,
0v)))) |
| 27 | 18, 26 | bibi12d 477 |
. . . . . 6
⊢ (B =
if(B ∈ ℋ , B, 0v) → ((if(A ∈ ℋ , A, 0v) ∈ (⊥
‘(⊥ ‘{B})) ↔
if(A ∈ ℋ , A, 0v) = (((if(A ∈ ℋ , A, 0v)
·i B) /
(B ·i
B)) ·s
B)) ↔ (if(A ∈ ℋ , A, 0v) ∈ (⊥
‘(⊥ ‘{if(B ∈ ℋ
, B, 0v)})) ↔
if(A ∈ ℋ , A, 0v) = (((if(A ∈ ℋ , A, 0v)
·i if(B
∈ ℋ , B, 0v))
/ (if(B ∈ ℋ , B, 0v)
·i if(B
∈ ℋ , B, 0v)))
·s if(B
∈ ℋ , B,
0v))))) |
| 28 | 14, 27 | imbi12d 474 |
. . . . 5
⊢ (B =
if(B ∈ ℋ , B, 0v) → ((¬ B = 0v → (if(A ∈ ℋ , A, 0v) ∈ (⊥
‘(⊥ ‘{B})) ↔
if(A ∈ ℋ , A, 0v) = (((if(A ∈ ℋ , A, 0v)
·i B) /
(B ·i
B)) ·s
B))) ↔ (¬ if(B ∈ ℋ , B, 0v) = 0v
→ (if(A ∈ ℋ , A, 0v) ∈ (⊥
‘(⊥ ‘{if(B ∈ ℋ
, B, 0v)})) ↔
if(A ∈ ℋ , A, 0v) = (((if(A ∈ ℋ , A, 0v)
·i if(B
∈ ℋ , B, 0v))
/ (if(B ∈ ℋ , B, 0v)
·i if(B
∈ ℋ , B, 0v)))
·s if(B
∈ ℋ , B,
0v)))))) |
| 29 | | ax-hvzercl 4987 |
. . . . . . 7
⊢ 0v ∈
ℋ |
| 30 | 29 | elimel 1793 |
. . . . . 6
⊢ if(A
∈ ℋ , A, 0v)
∈ ℋ |
| 31 | 29 | elimel 1793 |
. . . . . 6
⊢ if(B
∈ ℋ , B, 0v)
∈ ℋ |
| 32 | 30, 31 | h1de2b 5459 |
. . . . 5
⊢ (¬ if(B ∈ ℋ , B, 0v) = 0v
→ (if(A ∈ ℋ , A, 0v) ∈ (⊥
‘(⊥ ‘{if(B ∈ ℋ
, B, 0v)})) ↔
if(A ∈ ℋ , A, 0v) = (((if(A ∈ ℋ , A, 0v)
·i if(B
∈ ℋ , B, 0v))
/ (if(B ∈ ℋ , B, 0v)
·i if(B
∈ ℋ , B, 0v)))
·s if(B
∈ ℋ , B,
0v)))) |
| 33 | 12, 28, 32 | dedth2h 1787 |
. . . 4
⊢ ((A
∈ ℋ ∧ B ∈ ℋ )
→ (¬ B = 0v
→ (A ∈ (⊥ ‘(⊥
‘{B})) ↔ A = (((A
·i B) /
(B ·i
B)) ·s
B)))) |
| 34 | 33 | imp 277 |
. . 3
⊢ (((A
∈ ℋ ∧ B ∈ ℋ )
∧ ¬ B = 0v)
→ (A ∈ (⊥ ‘(⊥
‘{B})) ↔ A = (((A
·i B) /
(B ·i
B)) ·s
B))) |
| 35 | 34 | 3impa 609 |
. 2
⊢ ((A
∈ ℋ ∧ B ∈ ℋ ∧
¬ B = 0v) →
(A ∈ (⊥ ‘(⊥
‘{B})) ↔ A = (((A
·i B) /
(B ·i
B)) ·s
B))) |
| 36 | 4, 35 | bitrd 406 |
1
⊢ ((A
∈ ℋ ∧ B ∈ ℋ ∧
¬ B = 0v) →
(A ∈ (span ‘{B}) ↔ A =
(((A ·i
B) / (B
·i B))
·s B))) |