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四元数の行列表現
四元数の行列表現
w
+
x
i
+
y
j
+
z
k
↔
[
w
+
x
i
y
+
z
i
−
(
y
−
z
i
)
w
−
x
i
]
=
w
[
1
0
0
1
]
+
x
[
i
0
0
−
i
]
+
y
[
0
1
−
1
0
]
+
z
[
0
i
i
0
]
=
w
E
+
x
I
+
y
J
+
z
K
四元数の単位同士の積の確認
i
⋅
i
↔
I
⋅
I
=
[
i
0
0
−
i
]
⋅
[
i
0
0
−
i
]
=
[
i
⋅
i
+
0
⋅
0
i
⋅
0
+
0
⋅
(
−
i
)
0
⋅
i
+
(
−
i
)
⋅
0
0
⋅
0
+
(
−
i
)
⋅
(
−
i
)
]
=
[
−
1
0
0
−
1
]
=
−
E
j
⋅
j
↔
J
⋅
J
=
[
0
1
−
1
0
]
⋅
[
0
1
−
1
0
]
=
[
0
⋅
0
+
1
⋅
(
−
1
)
0
⋅
1
+
1
⋅
0
(
−
1
)
⋅
0
+
0
⋅
(
−
1
)
(
−
1
)
⋅
1
+
0
⋅
0
]
=
[
−
1
0
0
−
1
]
=
−
E
k
⋅
k
↔
K
⋅
K
=
[
0
i
i
0
]
⋅
[
0
i
i
0
]
=
[
0
⋅
0
+
i
⋅
i
0
⋅
i
+
i
⋅
0
i
⋅
0
+
0
⋅
i
i
⋅
i
+
0
⋅
0
]
=
[
−
1
0
0
−
1
]
=
−
E
i
⋅
j
↔
I
⋅
J
=
[
i
0
0
−
i
]
⋅
[
0
1
−
1
0
]
=
[
i
⋅
0
+
0
⋅
(
−
1
)
i
⋅
1
+
0
⋅
0
0
⋅
0
+
(
−
i
)
⋅
(
−
1
)
0
⋅
1
+
(
−
i
)
⋅
0
]
=
[
0
i
i
0
]
=
K
j
⋅
i
↔
J
⋅
I
=
[
0
1
−
1
0
]
⋅
[
i
0
0
−
i
]
=
[
0
⋅
i
+
1
⋅
0
0
⋅
0
+
1
⋅
(
−
i
)
(
−
1
)
⋅
i
+
0
⋅
0
(
−
1
)
⋅
0
+
0
⋅
(
−
i
)
]
=
[
0
−
i
−
i
0
]
=
−
K
i
⋅
k
↔
I
⋅
K
=
[
i
0
0
−
i
]
⋅
[
0
i
i
0
]
=
[
i
⋅
0
+
0
⋅
i
i
⋅
i
+
0
⋅
0
0
⋅
0
+
(
−
i
)
⋅
i
0
⋅
i
+
(
−
i
)
⋅
0
]
=
[
0
−
1
1
0
]
=
−
J
k
⋅
i
↔
K
⋅
I
=
[
0
i
i
0
]
⋅
[
i
0
0
−
i
]
=
[
0
⋅
i
+
i
⋅
0
0
⋅
0
+
i
⋅
(
−
i
)
i
⋅
i
+
0
⋅
0
i
⋅
0
+
0
⋅
(
−
i
)
]
=
[
0
1
−
1
0
]
=
J
j
⋅
k
↔
J
⋅
K
=
[
0
1
−
1
0
]
⋅
[
0
i
i
0
]
=
[
0
⋅
0
+
1
⋅
i
0
⋅
i
+
1
⋅
0
(
−
1
)
⋅
0
+
0
⋅
i
(
−
1
)
⋅
i
+
0
⋅
0
]
=
[
i
0
0
−
i
]
=
I
k
⋅
j
↔
K
⋅
J
=
[
0
i
i
0
]
⋅
[
0
1
−
1
0
]
=
[
0
⋅
0
+
i
⋅
(
−
1
)
0
⋅
1
+
i
⋅
0
i
⋅
0
+
0
⋅
(
−
1
)
i
⋅
1
+
0
⋅
0
]
=
[
−
i
0
0
i
]
=
−
I
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