§5 复数

§5 复数 C1复数域 1）矩阵形式同构域： P = { X ∣ X = ( a b − b a ) = a E + b J , J = ( 0 1 − 1 0 ) } P = \Big\{ X | X = \begin{pmatrix} a & b \\ -b & a \end{pmatrix} = a E + b J, J = \begin{pmatrix} 0 & 1 \\ -1 & 0 \

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