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Vector product (or
cross product
)
The vector product of two vectors
a
and
b
in
three dimensions
is defined by
a
×
b
=
(
a
x
a
y
a
z
)
×
(
b
x
b
y
b
z
)
=
(
a
y
b
z
- a
z
b
y
a
z
b
x
- a
x
b
z
a
x
b
y
- a
y
b
x
)
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