Re: [Maxima-discuss] Problem with draw2d(implicit(...))

[Thomas D. D. <to...@wa...>]

On 2020-03-20 08:24, Michel Talon wrote:
> Hello,
> 
> to do something with the quaratine, i am studying the chapter on 
> resolution of singularities
> 
> of algebraic curves in the book by Walker.  So i compute the various 
> Puiseux series of the curve
> 
> 2*x^5-x^3*y+2*x^2*y^2-x*y^3+2*y^5=0 and at the end i had the idea to 
> plot this curve around (0,0)
> 
Maple2019 show a curve passing through 0.
A curve to 0,0 in the 2nd quadrant,
Rabits ears in the first quadrant,
A curve from 0,0 in the 4th quadrant.

f:= 2*x^5-x^3*y+2*x^2*y^2-x*y^3+2*y^5;
for idx to 10 do
     lim:=1/idx:
     plots[implicitplot](f,x=-lim..lim,y=-lim..lim,numpoints=100000);
end do;

If I reduce the numpoints, the curve will sometimes not appear to pass 
through 0,0.

I do not remember the syntax to increase the number of points in gnuplot.

Tpm Dean