PCSI 3 : programme de colle no 8 semaine du 28 novembre au 3

 Mn,p(K)   n  p
    K
 X    AX   
     A
 j   AB     A  j
  B  i   AB   
  i   A B
 Mn(K)  In   
      A 
  K     E
  R  A=ER
 A∼
CA′

   n(K)   
     n   
 A∈ Mn(K)   
i. A  
ii. A∼
LIn
iii.   AX = 0    
iv.   B   AX =B
v.   B   AX =B 
    AtA