Which of these do you want to learn more about: - What e^A means when A is a matrix - How to think about solutions to linear systems of ordinary differential equations.
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I'm sure you've seen this (and maybe we've talked about it?), but just in case not, it's a very good paper with one of the best titles ever: "19 dubious ways to exponentiate a matrix" http://www.cs.cornell.edu/cv/researchpdf/19ways+.pdf …
Excuse me: that's the sequel. Link to the original (and discussion) here:https://blogs.mathworks.com/cleve/2012/07/23/a-balancing-act-for-the-matrix-exponential/ …
