| [ QuizWit ] in KIDS 글 쓴 이(By): drake (drake) 날 짜 (Date): 2003년 8월 9일 토요일 오전 03시 17분 49초 제 목(Title): Re: Linear Algebra 에 관련된 문제 thanx, hwan-sang. your derivation is almost same with mine. however, i was stopped at this line. > tr(b'Pbc'Pc) = tr(bc'Pcb'P) = 0. how can you say this is true ? b'c = 0 , but neither bc' nor cb' is 0. as you said, it is a boring problem. but i have to solve this. -_- oh, one more thing. > so b'Pc=0 with b'c=0. > the only solution is Pc=c. projection or Pb=b. really ? i think it is not the 'only' solution. anyway, thanx for your help. |