Solution
= Solution
Use $T$ as the time unit and define $p=aP$, $n=asN$. Direct substitution gives the dimensionless equations
$$
\boxed{n_{t+1}=rn_te^{-p_t},\qquad p_{t+1}=n_t(1-be^{-p_t}).}
$$
= Solution
Use $T$ as the time unit and define $p=aP$, $n=asN$. Direct substitution gives the dimensionless equations
$$
\boxed{n_{t+1}=rn_te^{-p_t},\qquad p_{t+1}=n_t(1-be^{-p_t}).}
$$