A simple interface for matrix exponentiation, similar to that found in the Matrix package.
A square matrix.
Time value; see details section below. Default value is 1.
This routine computes exp(t*x), where
t in a single numeric value,
and x is a square matrix and exp refers to the matrix exponential.
Formally, the matrix exponential is given by the power series:
expm(x) = x/1! + x^2/2! + x^3/3! + …
where the powers on the matrix correspond to matrix-matrix multiplications.
expm() directly computes the matrix exponential of a dense
matrix. The implementation uses an order 6 Pade' approximation with a
The matrix exponential.
Drew Schmidt email@example.com
Sidje RB (1998). "Expokit. A Software Package for Computing Matrix Exponentials." _ACM Trans. Math. Softw._, *24*(1), pp. 130-156. <URL: http://dx.doi.org/10.1145/285861.285868>, <URL: http://dl.acm.org/citation.cfm?id=285868>.
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