作者Dirichlet ( )
看板Math
标题Re: [线代] 线代(9)
时间Sun Aug 21 20:09:57 2005
※ 引述《PttFund (批踢踢基金只进不出)》之铭言:
: _
: Can you find a 2╳2 unitary matrix U, U U^T = I and det U≠±1?
: If not, explain why not.
U = (i 0)
(0 1)
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