[線代] 考研究所的考古題
對的證明錯的舉反例:
對所有的m*n階矩陣A B=A的轉置矩陣
則 rank(BA)=rank(AB)
===============================
這題毫無頭緒= =
結果試了很多個例子
都是對的
但是證明又卡卡的
因為一邊是m*m階矩陣 另外一邊卻是n*n階矩陣
有版友能給提示嗎!
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