Table 5.

Bifurcation values of ${\gamma }_1$ and${\gamma }_2$.

Cases	${\gamma }_1$	Without diffusion	With diffusion	${\gamma }_2$	Without diffusion	With diffusion
1	$0.125$	$0.124708$	$0.087493$	$0.2$	$0.199660$	$0.161489$
2	$0.125$	$0.124752$	$0.0873489$	$0.25$	$0.249586$	$0.196281$
3	$0.175$	$0.17471$	$0.133485$	$0.2$	$0.199694$	$0.161499$
4	$0.125$	$0.124726$	$0.0875375$	$0.2$	$0.199680$	$0.161530$