외적,outer_product - VeryGoodWiki

2계 반대칭,antisymmetric 텐서,tensor가 무슨 말이지...
일단 3차원 유클리드_공간,Euclidean_space에서 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:

Outer_product

외적

수학백과: 외적(https://terms.naver.com/entry.naver?docId=3405242&cid=47324&categoryId=47324)

차원이 올라가면 일반화로 exterior_product 이란 게 있다고.

Compare: 내적,inner_product

Up:

선형대수,linear_algebra
벡터의_내적과_외적
곱,product