ch-3.1-exam-7-revise-오충헌

1918 days ago by matrix

A=matrix(QQ,[[4,-2,3], [5,0,2]]) I2=identity_matrix(2) # identity matrix identity_matrix(n), n is the order I3=identity_matrix(3) O2=zero_matrix(3, 2) # zero matrix zero_matrix(m, n), m, n are the order print I2*A print print A*I3 print print A*O2 print (I2*A)==A print (A*I3)==A 
       
[ 4 -2  3]
[ 5  0  2]

[ 4 -2  3]
[ 5  0  2]

[0 0]
[0 0]


True
[ 4 -2  3]
[ 5  0  2]

[ 4 -2  3]
[ 5  0  2]

[0 0]
[0 0]


True