... ODEs¹

Abbreviations. ODE=ordinary differential equation; PDE=partial differential equation; LQ=linear-quadratic; Gy=Joule/kgm, the usual unit of radiation dose; DSB=DNA double strand break.

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... smooth.²

In many applications it is convenient to consider acute doses, corresponding to one or more delta functions in $R$, and then appropriate precautions are taken.

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