A quantity that can be expressed as a single real number if an appropriate unit is determined. It can be length, time, mass, energy, electric charge, etc. It is called this to distinguish it from vectors and tensors. Mathematically, the components of a vector change due to a linear transformation, but a scalar is a quantity that is invariant to all linear transformations and is equivalent to a 0th-order tensor. In vector space, an element of the coefficient field of a vector is called a scalar. → Related topics Linear independence | Gradient Source : Heibonsha Encyclopedia About MyPedia Information |
適当な単位をきめれば一つの実数で表すことのできる量。長さ,時間,質量,エネルギー,電荷など。ベクトル,テンソルと区別してこういう。数学的には,ベクトルは一次変換によってその成分が変化するが,スカラーはすべての一次変換に対し不変な量で,0階のテンソルに相当する。ベクトル空間では,ベクトルの係数体の元をスカラーという。 →関連項目一次独立|勾配 出典 株式会社平凡社百科事典マイペディアについて 情報 |
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