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## Main Question or Discussion Point

I need to find a trapping region for the next nonlinear ODE system

$u'=-u+v*u^2$

$v'=b-v*u^2$

for $b>0$.

What theory i need to use or wich code in Mathematica o Matlab could help me to find the optimal trapping region.

$u'=-u+v*u^2$

$v'=b-v*u^2$

for $b>0$.

What theory i need to use or wich code in Mathematica o Matlab could help me to find the optimal trapping region.