矩阵迹的性质.pdf

5 6 ( ) v o . o . l 5 N 6 19 9 8 12 . JO U R N A L O F H U N A N BU S IN E S S C L L E G E D E C 19 9 8 . A = , A A , t: A ( ) ( ) tr A = a l l + 2 + + a = a . ( ) : . 1 tr A + B = tr A + tr B ( ) ( ) ( ) . tr K A = K t r A 2 ( ) ( ) = tr A ( ) ( ) AT . 4 tr A B = tr BA ( ) ( ) . tr = tr B : = tr A B 5 A B C A C ( ) ( ) ( ) . 1 , , , , tr 1 + 6 A