Note: 旧的wordpress博客弃用,于是将以前的笔记搬运回来。
Question:
Prove or give a counterexample if U1,U2,WU_1, U_2, WU1,U2,W are esubspaces of VVV such that U1+W=U2+WU_1 + W = U_2 + WU1+W=U2+W, then U1=U2U_1 = U_2U1
Note: 旧的wordpress博客弃用,于是将以前的笔记搬运回来。
Question:
Prove or give a counterexample if U1,U2,WU_1, U_2, WU1,U2,W are esubspaces of VVV such that U1+W=U2+WU_1 + W = U_2 + WU1+W=U2+W, then U1=U2U_1 = U_2U1