An Application
Diagonalization can be used to compute the powers of a matrix A efficiently, provided the matrix is diagonalizable. Suppose we have found that
is a diagonal matrix. Then, as the matrix product is associative,
and the latter is easy to calculate since it only involves the powers of a diagonal matrix. This approach can be generalized to matrix exponential and other matrix functions since they can be defined as power series.
This is particularly useful in finding closed form expressions for terms of linear recursive sequences, such as the Fibonacci numbers.
Read more about this topic: Diagonalizable Matrix
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