Power-law reaction propensity
= Power-law reaction propensity
A power-law propensity uses the same reactant monomial as a deterministic <law of mass action>, scaled by reactor volume. For example, a bimolecular channel may be assigned $a(x)=\alpha x^2/V$. This convention differs at small copy number from the combinatorial propensity $\alpha x(x-1)/V$ and must therefore be stated explicitly.