| [ QuizWit ] in KIDS 글 쓴 이(By): iLUSiON (ivenomouth) 날 짜 (Date): 1998년 5월 3일 일요일 오전 02시 31분 57초 제 목(Title): linear algebra 2. A,B positive definite, (i.e. x'Ax > 0 for all vector x) C(AB) = (AB)C & C(A-B) = (A-B)C show AC=CA and BC=CB 1010101010101010101010101000000010101010010101010101000000010001111110101001010 0101010011111010101000100010110101010101010101001010101010101010101111111101010 1011111100010101010101010101101010101011111101010111101010001110101010001010110 http://www.math.mcgill.ca/~chung |