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Pseudoreflection : ウィキペディア英語版 | Pseudoreflection
In mathematics, a pseudoreflection is an invertible linear transformation of a finite-dimensional vector space such that it is not the identity transformation, has a finite (multiplicative) order, and fixes a hyperplane. The concept of pseudoreflection generalizes the concepts of reflection and complex reflection, and simply called reflection by some mathematicians. It plays an important role in Invariant theory of finite groups, including the Chevalley-Shephard-Todd theorem. 〔 〕 ==Formal Definition== Suppose that ''V'' is vector space over a field ''K'', whose dimension is a finite number ''n''. A pseudoreflection is an invertible linear transformation such that the order of ''g'' is finite and the fixed subspace of all vectors in ''V'' fixed by ''g'' has dimension ''n-1''.
抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Pseudoreflection」の詳細全文を読む
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