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Question: who can plot phase portraits for my equations

Question:who can plot phase portraits for my equations

yasir 72 5 Maple
student
May 05 2012
0


> 

with(DEtools)
> 

phaseportrait([`d&varphi;`/`d&zeta;` = psi, `d&psi;`/`d&zeta;` = `&varphi;`/alpha+`&x`(beta, `&varphi;`^3)/`&x`(3*alpha, c)], [`&varphi;`(Zeta), psi(Zeta)], `&varphi;` = -3 .. 3, psi = -2 .. 2, [alpha < 0, c < 0])
> 

``


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