Notes on problem 2(d), midterm 2, S2004, math 2270

Using maple or by hand on paper, define S to be the 4x4 matrix
whose unknown entries are s11, s12, ..., s44 (16 symbols). Write
out the homogeneous system AS-ST=0 in the form CX=0 where C
is 16x16 and X is 16x1, entries s11,s12, ..., s44. Solve this system
as best you can, choosing values for variable names whenever possible.
Test AS-ST=0 when you are done.