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Theory and Modern Applications

Table 1 Model with Smith growth law: \(G(x)=\frac{K-x}{K+Dx}\), \(F(y)=\frac{L-y}{L+Dy}\)

From: Optimal harvesting of an abstract population model with interval biological parameters

\(l_{1}=l_{2}\)

Equilibrium points \((x^{*},y^{*})\)

Eigenvalues \(\mu _{1}\), \(\mu _{2}\)

Nature

Stability

0

(0.419172512,0.908562552)

−0.581443562, −0.935736565

node

stable

0.2

(0.580237864,1.106635957)

−0.812364935, −1.154177340

node

stable

0.4

(0.742088030,1.303631499)

−1.038076409, −1.374218715

node

stable

0.6

(0.905409263,1.497837057)

−1.263864492, −1.593796608

node

stable

0.8

(1.069795883,1.688474898)

−1.494873355, −1.812561546

node

stable

1

(1.234382511,1.875292253)

−1.734772227, −2.031045452

node

stable