T=AB C=∑ 12 100 7=|72172723 2133 张量的运算7+7=∑(7+V) ABC=A(BC=A(. B)=ACB B)A=C BA B.CA=B·CA3 1 i j i e e = =  1 0 0 0 1 0 0 0 1     =       , ( ) i ij ij j i j T V T V e e + = +  ( ) ( ) ( ) ( ) AB C A B C A C B AC B C B A C BA B C A B CA  =  =  =  =  =  =  =  张量的运算 T AB    =           = 31 32 33 21 22 23 11 12 13 T T T T T T T T T T