Hello,
I've the following curve,
t=var('t')
C=[(-exp(2*t) + (-t^2 - 2*t)*ln(t)^2 - t^6 + 2*exp(t)*t^3)/(exp(2*t) + (t^2
- t)*ln(t)^2 + t^6 - 2*exp(t)*t^3), ((28*t^18 + 60*ln(t)^2*t^14 +
36*ln(t)^4*t^10 - 10*ln(t)^3*t^10 + 4*t^6*ln(t)^6 - 6*ln(t)^5*t^6)*exp(2*t)
+ (-56*t^15 - 80*ln(t)^2*t^11 - 24*ln(t)^4*t^7 + 10*ln(t)^3*t^7 +
2*ln(t)^5*t^3)*exp(3*t) + (70*t^12 + 60*ln(t)^2*t^8 + 6*ln(t)^4*t^4 -
5*ln(t)^3*t^4)*exp(4*t) + (-56*t^9 - 24*ln(t)^2*t^5 + ln(t)^3*t)*exp(5*t) +
(28*t^6 + 4*t^2*ln(t)^2)*exp(6*t) - 8*exp(7*t)*t^3 + exp(8*t) + (t^8 +
t^4)*ln(t)^8 + ((t^5 + 2*t^3)*exp(t) - t^8 - 2*t^6)*ln(t)^7 + (4*t^12 -
8*t^9*exp(t))*ln(t)^6 + (-2*t^12 + 6*t^9*exp(t))*ln(t)^5 + (6*t^16 -
24*t^13*exp(t))*ln(t)^4 + (-t^16 + 5*t^13*exp(t))*ln(t)^3 + (4*t^20 -
24*t^17*exp(t))*ln(t)^2 + t^24 - 8*exp(t)*t^21)/(2*(((3*t^4 -
2*t^3)*ln(t)^4 + (18*t^8 - 6*t^7)*ln(t)^2 + 15*t^12)*exp(2*t) + ((-12*t^5 +
4*t^4)*ln(t)^2 - 20*t^9)*exp(3*t) + ((3*t^2 - t)*ln(t)^2 + 15*t^6)*exp(4*t)
- 6*exp(5*t)*t^3 + exp(6*t) + (t^6 - t^5)*ln(t)^6 + (t^5/2 -
exp(t)*t^2/2)*ln(t)^5 + ((-6*t^7 + 4*t^6)*exp(t) + 3*t^10 - 2*t^9)*ln(t)^4
+ ((-12*t^11 + 4*t^10)*exp(t) + 3*t^14 - t^13)*ln(t)^2 + t^18 -
6*exp(t)*t^15)*(exp(2*t) + t^2*ln(t)^2 + t^3*(t^3 - 2*exp(t))))]
and I'd like to see how it is like. Just with:
parametric_plot(C, (t,0,80), plot_points=5500)
one sees what's going on. However, with
parametric_plot(C, (t,0,90), plot_points=5500)
suddenly a vertical lines appears. I think it is a bug, am I right ?
thanks
Gema M.
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