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how to apply an assume in plot

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How I can apply the condition or assuming (a>0) in plot?

plot.mw

I want to have a plot according to the attached figure.

restart; A5 := 2.4821; A3 := .8417; A4 := -.1384; K := 0.3e-2; `σσ` := (9*A3*A5*a^2-10*A4^2*a^2)/(24*A3^(3/2))+K/(2*a*A3^(1/2))

2.4821

 

.8417

 

-.1384

 

1.004210973*a^2+0.1634980569e-2/a

(1)

NULL

solve(sigma = 1.004210973*a^2+0.1634980569e-2/a, a)

solve(sigma = 1.004210973*a^2-0.1634980569e-2/a, a)

plot({1.079801433*10^(-25)*(-6.465854665*10^71+1.058832302*10^46*sqrt(-2.057991547*10^56*sigma^3+3.729044048*10^51))^(1/3)+3.074042610*10^24*sigma/(-6.465854665*10^71+1.058832302*10^46*sqrt(-2.057991547*10^56*sigma^3+3.729044048*10^51))^(1/3), 1.079801433*10^(-25)*(6.465854665*10^71+1.058832302*10^46*sqrt(-2.057991547*10^56*sigma^3+3.729044048*10^51))^(1/3)+3.074042610*10^24*sigma/(6.465854665*10^71+1.058832302*10^46*sqrt(-2.057991547*10^56*sigma^3+3.729044048*10^51))^(1/3)}, sigma = -.2 .. .2)

 

``


 

Download plot.mwt 


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