#1.28 u=x^2-y^2, u=2x^2+y^2, v=xy, v=y^2/x Orthogonality Test

https://www.donationalerts.com/r/sophistication_king ... #1.28 u=x^2-y^2, u=2x^2+y^2, v=xy, v=y^2/x Orthogonality Test #Demidovich, #Демидович