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Math Help - nullcline question

  1. #1
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    nullcline question



    y=0 is a horizontal null cline and x=0 is a vertical nullcline. What are the other two nullclines?

    Wouldn't they just be (just set the derivative to zero?):

    0=y(4-2x-y) for the v nullcine
    0=x(4-x-2y) for the h nullcline
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  2. #2
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    Quote Originally Posted by cdlegendary View Post


    y=0 is a horizontal null cline and x=0 is a vertical nullcline. What are the other two nullclines?

    Wouldn't they just be (just set the derivative to zero?):

    0=y(4-2x-y) for the v nullcine
    0=x(4-x-2y) for the h nullcline
    No, a nullcline is a line not a parabola. dx/dt= 0 when y(4- 2x-y)= 0. That will clearly happen when the factor y= 0 which is why they said that "y= 0 is a horizontal nullcline". What is the other factor?
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