[最も欲しかった] y=x^2 graph in 3d 305710-X^2+y^2=1 graph in 3d

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X^2+y^2=1 graph in 3d- X^2 y^2=4 graph 3dPlot the surface The main commands are mesh(x,y,z) and surf(z,y,z)If one of the variables x, y or z is missing from the equation of a surface, then the surface is a cylinder Note When you are dealing with surfaces, it is important to recognize that an equation like x2 y2 = 1 represents a cylinder and not a circle The trace of2 Answers How about a 3D contour plot ContourPlot3D x^2 y^2 == 1, {x, 2, 2}, {y, 2, 2}, {z, 2, 2} Although Mark's answer is the "natural" one, here are other options just for completeness Use RevolutionPlot3D after realizing for example that in the semi/plane {y==0, x>0} x takes only the value 1 and z takes any value (freely)