Why column 1 is M^2*v? How can we know?
Please see attached. Many thanks.
if Q-1MQ = that matrix,
then MQ = Q(that matrix), which is … ?
I know what you mean
Let that matrix be D
I can find MQ=QD by trail and error
Is there any other method I can use to find the columns of Q without trial and error?
(just got up :zzz:)
it isn't trial and error
what are the columns of QD ?
it's been a long time..
The columns of QD is [0,0,0]^T, [1,1,-1]^T and [2,3,1]^T
which are ##M^3v , M^2v , Mv ## respectively
I am stupid and I still do not understand..
for any matrix P with columns A B C:
the columns of PD are 0 A B
the columns of MP are MA MB MC
so MP = PD (ie P-1MP = D) if 0 = MA, A = MB, B = MC
(so A = MB = M2C and M3C = 0)
so we choose the columns of P to be M2 MC and C
(and then we call it Q instead of P)
Separate names with a comma.