Suppose that A B and C are n x n matrices with B invertable
Suppose that A, B, and C are n x n matrices with B invertable and I-BAB-1=C
a. Solve the equation for A, show steps.
b. Contruct 2x2 matrces A, B, and C that satisfy a, where B is not a multiple of I2.
c. Is A always invertable? let C=
, explain?
| a | b |
| c | d |
Solution
A is always invertable
