Proof of Theorem pjthlem5
| Step | Hyp | Ref
| Expression |
| 1 | | pjthlem5.2 |
. . . 4
⊢ C
∈ ℋ |
| 2 | | pjthlem5.3 |
. . . . 5
⊢ S
∈ ℂ |
| 3 | | pjthlem5.1 |
. . . . 5
⊢ D
∈ ℋ |
| 4 | 2, 3 | hvmulcl 4990 |
. . . 4
⊢ (S
·s D)
∈ ℋ |
| 5 | 1, 4 | hvsubcl 5002 |
. . 3
⊢ (C
−v (S
·s D))
∈ ℋ |
| 6 | 5 | normsq 5082 |
. 2
⊢ ((norm ‘(C −v (S ·s D)))↑2) = ((C −v (S ·s D)) ·i (C −v (S ·s D))) |
| 7 | 2, 1, 3 | normlem0 5062 |
. 2
⊢ ((C
−v (S
·s D))
·i (C
−v (S
·s D))) =
(((C ·i
C) + (-(∗ ‘S) · (C
·i D))) +
((-S · (D ·i C)) + ((S
· (∗ ‘S)) ·
(D ·i
D)))) |
| 8 | 1 | normcl 5081 |
. . . . . . 7
⊢ (norm ‘C) ∈ ℝ |
| 9 | 8 | sqrecl 4699 |
. . . . . 6
⊢ ((norm ‘C)↑2) ∈ ℝ |
| 10 | 9 | recn 4098 |
. . . . 5
⊢ ((norm ‘C)↑2) ∈ ℂ |
| 11 | 3, 1 | hicl 5044 |
. . . . . . 7
⊢ (D
·i C)
∈ ℂ |
| 12 | 2, 11 | mulcl 4105 |
. . . . . 6
⊢ (S
· (D
·i C))
∈ ℂ |
| 13 | 12 | cjcl 4804 |
. . . . 5
⊢ (∗ ‘(S · (D
·i C)))
∈ ℂ |
| 14 | 10, 13 | subneg 4148 |
. . . 4
⊢ (((norm ‘C)↑2) − (∗ ‘(S · (D
·i C)))) =
(((norm ‘C)↑2) + -(∗
‘(S · (D ·i C)))) |
| 15 | 1 | normsq 5082 |
. . . . 5
⊢ ((norm ‘C)↑2) = (C
·i C) |
| 16 | 2, 11 | cjmul 4819 |
. . . . . . . 8
⊢ (∗ ‘(S · (D
·i C))) =
((∗ ‘S) · (∗
‘(D
·i C))) |
| 17 | | ax-his1 5045 |
. . . . . . . . . 10
⊢ ((C
∈ ℋ ∧ D ∈ ℋ )
→ (C
·i D) =
(∗ ‘(D
·i C))) |
| 18 | 1, 3, 17 | mp2an 520 |
. . . . . . . . 9
⊢ (C
·i D) =
(∗ ‘(D
·i C)) |
| 19 | 18 | opreq2i 3010 |
. . . . . . . 8
⊢ ((∗ ‘S) · (C
·i D)) =
((∗ ‘S) · (∗
‘(D
·i C))) |
| 20 | 16, 19 | eqtr4 1122 |
. . . . . . 7
⊢ (∗ ‘(S · (D
·i C))) =
((∗ ‘S) · (C ·i D)) |
| 21 | 20 | negeqi 4137 |
. . . . . 6
⊢ -(∗ ‘(S · (D
·i C))) =
-((∗ ‘S) · (C ·i D)) |
| 22 | 2 | cjcl 4804 |
. . . . . . 7
⊢ (∗ ‘S) ∈ ℂ |
| 23 | 1, 3 | hicl 5044 |
. . . . . . 7
⊢ (C
·i D)
∈ ℂ |
| 24 | 22, 23 | mulneg1 4190 |
. . . . . 6
⊢ (-(∗ ‘S) · (C
·i D)) =
-((∗ ‘S) · (C ·i D)) |
| 25 | 21, 24 | eqtr4 1122 |
. . . . 5
⊢ -(∗ ‘(S · (D
·i C))) =
(-(∗ ‘S) · (C ·i D)) |
| 26 | 15, 25 | opreq12i 3011 |
. . . 4
⊢ (((norm ‘C)↑2) + -(∗ ‘(S · (D
·i C)))) =
((C ·i
C) + (-(∗ ‘S) · (C
·i D))) |
| 27 | 14, 26 | eqtr2 1120 |
. . 3
⊢ ((C
·i C) +
(-(∗ ‘S) · (C ·i D))) = (((norm ‘C)↑2) − (∗ ‘(S · (D
·i C)))) |
| 28 | 12 | negcl 4142 |
. . . . 5
⊢ -(S
· (D
·i C))
∈ ℂ |
| 29 | 2 | cjmulrcl 4821 |
. . . . . . 7
⊢ (S
· (∗ ‘S)) ∈
ℝ |
| 30 | 29 | recn 4098 |
. . . . . 6
⊢ (S
· (∗ ‘S)) ∈
ℂ |
| 31 | 3, 3 | hicl 5044 |
. . . . . 6
⊢ (D
·i D)
∈ ℂ |
| 32 | 30, 31 | mulcl 4105 |
. . . . 5
⊢ ((S
· (∗ ‘S)) ·
(D ·i
D)) ∈ ℂ |
| 33 | 28, 32 | addcom 4106 |
. . . 4
⊢ (-(S
· (D
·i C)) +
((S · (∗ ‘S)) · (D
·i D))) =
(((S · (∗ ‘S)) · (D
·i D)) +
-(S · (D ·i C))) |
| 34 | 2, 11 | mulneg1 4190 |
. . . . 5
⊢ (-S
· (D
·i C)) =
-(S · (D ·i C)) |
| 35 | 34 | opreq1i 3009 |
. . . 4
⊢ ((-S
· (D
·i C)) +
((S · (∗ ‘S)) · (D
·i D))) =
(-(S · (D ·i C)) + ((S
· (∗ ‘S)) ·
(D ·i
D))) |
| 36 | 32, 12 | subneg 4148 |
. . . 4
⊢ (((S
· (∗ ‘S)) ·
(D ·i
D)) − (S · (D
·i C))) =
(((S · (∗ ‘S)) · (D
·i D)) +
-(S · (D ·i C))) |
| 37 | 33, 35, 36 | 3eqtr4 1126 |
. . 3
⊢ ((-S
· (D
·i C)) +
((S · (∗ ‘S)) · (D
·i D))) =
(((S · (∗ ‘S)) · (D
·i D))
− (S · (D ·i C))) |
| 38 | 27, 37 | opreq12i 3011 |
. 2
⊢ (((C
·i C) +
(-(∗ ‘S) · (C ·i D))) + ((-S
· (D
·i C)) +
((S · (∗ ‘S)) · (D
·i D)))) =
((((norm ‘C)↑2) −
(∗ ‘(S · (D ·i C)))) + (((S
· (∗ ‘S)) ·
(D ·i
D)) − (S · (D
·i C)))) |
| 39 | 6, 7, 38 | 3eqtr 1123 |
1
⊢ ((norm ‘(C −v (S ·s D)))↑2) = ((((norm ‘C)↑2) − (∗ ‘(S · (D
·i C)))) +
(((S · (∗ ‘S)) · (D
·i D))
− (S · (D ·i C)))) |