Hi,

how we define the function

f(x,y,t=0)= a if |x-x_0|^2+|y-y_0|^2 <= r^2 , 0 else

a,x_0 , y_0 and r are real data.

Thank you in advance

Hi,

how we define the function

f(x,y,t=0)= a if |x-x_0|^2+|y-y_0|^2 <= r^2 , 0 else

a,x_0 , y_0 and r are real data.

Thank you in advance

`f = ( (x-x0)^2+(y-y0)^2 <= r^2 ? a : 0 )`

Thank you so much Julien G