Matrix method to solve radioactive decay equations.

Equations related to radioactive decay are solved by a fast algebraic approach. Rn-220 decay as example.

A system of differential equations related to radioactive decay is solved by a fast matrix method. The method is faster than the classic 'dsolve' approach. For the 'dsolve' approach have a look at:

https://de.mathworks.com/matlabcentral/fileexchange/69157-radon-220-thoron-decay-chain

A detailed description can be found here:
L. Moral and A. F. Pacheco, Am. J. Phys. 71(7) 2003, 684 - 686.
DOI: 10.1119/1.1571834