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Help!


Could anybody teach me how to shade the region surrounded by the curve plotted by the code below? The curve is determined by the intersection of two 3D curves, x^3 + x a + b == 0, and a + 3 x^2==0.

Thanks a lot!

Jun


Mathematica cade:

ContourPlot3D[
  x^3 + x a + b == 0, {x, -3.2, 3.2}, {a, -3.2, 3.2}, {b, -3.2, 3.2},
  MeshFunctions -> {Function[{x, a, b}, a + 3 x^2]}, Mesh -> {{0}},
  ContourStyle -> None, PlotPoints -> 100, Boxed -> False,
  Axes -> False] /. {x_Real, a_Real, b_Real} -> {3.1, a, b}







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