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Math Help - differential equation-drawing isocline and flow vector

  1. #1
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    differential equation-drawing isocline and flow vector



    i have problem with drawing isoclines and flow vectors
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  2. #2
    MHF Contributor Mathstud28's Avatar
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    Quote Originally Posted by szpengchao View Post


    i have problem with drawing isoclines and flow vectors
    Letting \frac{dy}{dx}=c

    we see that c=\frac{x-2y}{2x+y}\Rightarrow{y=\frac{5x}{c+2}-2x}

    Now letting c be equal to certain numbers sketch your isoclines


    and considering c is a constant your isoclines are lines
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  3. #3
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    yeah

    yeah...i got that...but i saw others' work, there are not only straight lines but some vector...

    how can u draw the flow vector diagram for this?
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