@Carl Love ohhh., now i understand.I know that I should not be bother with delta but is there any other way to get term of delta in matrix form by using maple?

@Carl Love

I have this system

D11=-delta D11
D12=0
D21=0
D22=D22

so in matrix form i should get

[-delta D11        0]

[0                   D22]

with condition delta must not equal to 0 and 1 (delta is any number so we do not need to be evaluated)

can you figure it out this please? thank you
 

@Carl Love Thank You for your concern. I take the code from the thesis n just tried by using my maple.. it is already working., really appreciate your help.

@Adri van der Meer I am using your suggestion and it is working. Thank You so much.