- #1
fallen186
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Homework Statement
(Commutativity) Find all 2 x 2 matrices A = [ajk ] that commute with B = [bjk], where bjk = j+k
Homework Equations
The Attempt at a Solution
ajk =
1,1
1,1
bjk =
j+k, j+k
j+k, j+k
I am confused about what they are trying to ask me. I understand that commute means that you can reverse it and you will come out with same outcome. I.E. like 3 x 2 = 6 and 2 x 3 = 6. Can someone give me a clue of what I should try to do.