[[벡터,vector]]의 [[이항연산,binary_operation]].

2계 [[반대칭,antisymmetric]] [[텐서,tensor]]가 무슨 말이지...
일단 3차원 [[유클리드_공간,Euclidean_space]]에서 살펴보면

'''See also [[벡터곱,vector_product,cross_product]]'''

----
 $\vec{A}\times\vec{B}=|\vec{A}| |\vec{B}|\sin\theta\hat{n}$
에 대입하면,
 $\hat{\rm i}\times\hat{\rm i}=\vec{0}$
 $\hat{\rm j}\times\hat{\rm j}=\vec{0}$
 $\hat{\rm k}\times\hat{\rm k}=\vec{0}$

 $\hat{\rm i}\times\hat{\rm j}=1\cdot1\cdot1\cdot\hat{\rm k}=\hat{\rm k}$
 $\hat{\rm j}\times\hat{\rm k}=\hat{\rm i}$
 $\hat{\rm k}\times\hat{\rm i}=\hat{\rm j}$

 $\hat{\rm j}\times\hat{\rm i}=-\hat{\rm k}$
 $\hat{\rm k}\times\hat{\rm j}=-\hat{\rm i}$
 $\hat{\rm i}\times\hat{\rm k}=-\hat{\rm j}$
----
Twins:
[[WpEn:Outer_product]]
[[Namu:외적]]
[[https://terms.naver.com/entry.naver?docId=3405242&cid=47324&categoryId=47324 수학백과: 외적]]
 차원이 올라가면 일반화로 exterior_product 이란 게 있다고.

Compare: [[내적,inner_product]]

Up:
 [[선형대수,linear_algebra]]
 [[벡터의_내적과_외적]]
 [[곱,product]]