Question: Consider a flow field represented by the stream function (psi=3 x^{5} y-10 x^{3} y^{3}+3 x y^{5}). Is this a possible two-dimensional incompressible flow? Is the

Consider a flow field represented by the stream function $\psi=3 x^{5} y-10 x^{3} y^{3}+3 x y^{5}$. Is this a possible two-dimensional incompressible flow? Is the flow irrotational?

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