MathGroup Archive 1997

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Plot3D error

Hello everybody.

Can anyone tell me what's wrong?

Plot3D[(1+2 x+y^2)^(1/3),{x,-10,10},{y,-10,10}]

gives me error:  Plot3D::gval: Function value 0.4+0.7I at grid point
not real
And function is not completely plotted.
Any suggestion would be appreciated.

Karl Kevala

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