Figure 3From: Bogdanov–Takens bifurcation of a Holling IV prey–predator model with constant-effort harvestingThere exists an unstable multiple focus \(E_{1}^{*}=(0.1108,0.0248)\) with multiplicity one and a BT singularity \(E^{*}=(0.3946,0.0884)\) of codimension 2 for \(h_{1}=0.1\) and \(h_{2}=0.3\)Back to article page