︠dbc42042-eeb0-4aa9-adbe-cd91ab66bd69s︠ x, y = var('x y') plot3d(sin(pi*(x^2+y^2))/sqrt(x^2+y^2), (x,-1.5,1.5),(y,-1.5,1.5), mesh=True,color='yellow') ︡e8a7b40a-2c29-40f6-9c9d-2bfbec08fdd8︡{"file":{"filename":"932d1172-0080-43f7-b3ac-89574cfc60d8.sage3d","uuid":"932d1172-0080-43f7-b3ac-89574cfc60d8"}}︡{"done":true}︡ ︠c9d50ca1-bd6c-4bda-aa20-849ea1475c92︠