1 Correction to: Bulletin of Mathematical Biology (2021) 83:110 https://doi.org/10.1007/s11538-021-00941-0

The original version of the article, unfortunately, contained a few misprints. The notation of \(\lambda_{H}\) was shown incorrectly in a few places in the published version. It has been corrected in this correction.

1. The Theorem 1 should be read as follows:

Theorem 1

Let \(\left(U,V\right)=(\mathrm{0,0})\) be the canard point of the transformed system (12) at \(\lambda =0\) such that \(({0,0})\) is a folded singularity and \(G\left({0,0},0\right)=0\). Then, for sufficiently small \(\varepsilon\) there exist a singular Hopf bifurcation curve \(\lambda ={\lambda }_{H}(\sqrt{\varepsilon })\) such that the equilibrium point \(P\) of the system (12) is stable for \(\lambda >{\lambda }_{H}(\sqrt{\varepsilon })\) and

$${\lambda }_{H}\left(\sqrt{\varepsilon }\right)=-\frac{{b}_{3}\left({a}_{1}+{a}_{5}\right)}{2{b}_{2}{b}_{4}}\varepsilon +O\left({\varepsilon }^{\frac{3}{2}}\right).$$
(17)

2. In Eq. (18), the expression on the left hand side \({o}_{H}(\sqrt{\varepsilon })\) should be read as \({\delta }_{H}(\sqrt{\varepsilon })\).

3. In the Appendix B, after Eq. (44), the expressions \({\ge }_{H}(\sqrt{\varepsilon })\) should be read as \({\lambda }_{H}(\sqrt{\varepsilon })\) at three places of occurrence.

The original article has been corrected.