. 2018 Dec 4;2018:7930603. doi: 10.1155/2018/7930603

Table 3.

The LAS conditions for E₂(P^∗, T^∗), in case of α₁=α₂=α.

LAS conditions of E₂
A ₁(A₂+1) − 1 < 0 (from Routh–Hurwitz criteria in (14))
Or
$\{\begin{matrix} (A_{1} (A_{2} + 1) - 1) > 0, \\ 4 ((β_{P} δ^{2} A_{1}) / (μ Λ (1 - A_{1}))) > {(A_{1} (A_{2} + 1) - 1)}^{2}, \\ \|\tan^{- 1} (4 (β_{P} δ^{2} A_{1}) / (μ Λ (1 - A_{1})) - {(A_{1} (A_{2} + 1) - 1)}^{2}) / (- (A_{1} (A_{2} + 1) - 1))\| > (α π / 2), \end{matrix}\}$ (from \|arg(λ_i)\| > (απ/2) in (15))
Or
\|cos⁻¹((β_P((A₁(A₂+1) − 1))²/2(δ²A₁/μΛ(1 − A₁))) − 1)\| > πα (from (46))