Algorithm 2.2 Pseudocode for the hybrid simulation algorithm

$$\begin{array}{cc}\hfill & \mathrm{Require}:n,y_A,K⊳K:\text{Maximum number of reactions}\hfill \\ \hfill & \mathrm{Ensure}:t_1,t_2,\dots ⊳\text{Timings of creation of}B\text{molecules}\hfill \\ \hfill & \hfill \\ \hfill & 1:\text{Set}{t}_0=0\hfill \\ \hfill & 2:\mathbf{for}i=1,2,\dots ,K\mathbf{do}\hfill \\ \hfill & 3:\text{Calculate}\Lambda =({\int }_0^{\infty }n\tau (s)y_A(t_{i-1},s)\mathrm{d}s{)}^{-1}.\hfill \\ \hfill & 4:\mathbf{if}0<\Lambda <\infty \mathbf{then}\hfill \\ \hfill & 5:\text{Draw an exponential random variable}T\text{with mean}\Lambda ,i.e.,T\sim \text{EXPONENTIAL}(\Lambda )\hfill \\ \hfill & 6:\text{Set}{t}_i=t_{i-1}+T\hfill \\ \hfill & 7:\mathbf{else}\hfill \\ \hfill & 8:\text{Stop and break loop}\hfill \\ \hfill & 9:\mathbf{end}\mathbf{if}\hfill \\ \hfill & 10:\text{Set}i=i+1.\hfill \\ \hfill & 11:\mathbf{end}\mathbf{for}\hfill \end{array}$$