183104024xzy mnmnmmmmnnnnijijbabababababababababaBA221122222221211112121111)(mnmnmmmmnnnnijijbabababababababababaBA221122222221211112121111)(111212122212nnmmmnaaaaaaAaaa mnmmnnkakakakakakakakakakA212222111211 skkjiksjisjijiijbabababac12211 msmmssaaaaaaaaaA212222111211 snssnnbabbabbbbB212222111211可交换的矩阵可交换的矩阵，求所有与，求所有与设设例例AA 12011.)()2(;,)1(211212212121BABABABBBBABBA 也也可可交交换换与与均均可可交交换换，证证明明：和和与与设设例例A=AEn=A 个个kkAAAA 个个kkAAAA ncba )1(1计算计算例例n 0000100001000010)2(mnmmnnaaaaaaaaaA212222111211 mnnnmmaaaaaaaaaA212221212111T
