Question: A flow field is represented by the stream function (psi=x^{4}-2 x^{3} y+2 x y^{3}-y^{4}). Is this a possible two-dimensional flow? Is the flow irrotational?

A flow field is represented by the stream function \(\psi=x^{4}-2 x^{3} y+2 x y^{3}-y^{4}\). Is this a possible two-dimensional flow? Is the flow irrotational?

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