Jacobean

Japanese: Jacobian
Jacobean

x = φ( u , v ), y = ψ( u , v ) gives a one-to-one mapping from point set B on the uv plane to point set A on the xy plane, and φ and ψ are continuously and partially differentiable with respect to u and v . In this case, if one of A and B has a fixed area, the other also has a fixed area, and the determinant in (7) is called a function determinant or Jacobian determinant (Jacobian). In particular, if x = r cosθ, y = r sinθ (two-dimensional polar coordinates), then, In the three-dimensional case, we can write a formula similar to (8) using a function determinant for x = φ( u , v , w ), y = ψ( u , v , w ), z = χ(u, v , w ) under the same assumptions as above. …

*Some of the terminology explanations that mention "Jacobian" are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

x=φ(u,v),y=ψ(u,v)により,uv平面上の点集合Bからxy平面上の点集合Aへの1対1の写像が与えられていて,φ,ψはu,vに関して連続偏微分可能とする。このとき,とすると,A,Bのうち一方が面積確定なら他方も面積確定で,(7)の行列式を関数行列式,またはヤコビの行列式(ヤコビアンJacobian)という。とくに,xrcosθ,yrsinθ(二次元の極座標)とすると,であるから, 三次元の場合にはx=φ(u,v,w),y=ψ(u,v,w),z=χ(u,v,w)について上と同様な仮定のもとに,関数行列式,を用いて(8)と同様な公式を書くことができる。…

※「Jacobian」について言及している用語解説の一部を掲載しています。

出典|株式会社平凡社世界大百科事典 第2版について | 情報

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