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 Aug21 accepted How do I find the relative extrema of a function in spherical coordinates? Aug21 comment How do I find the relative extrema of a function in spherical coordinates? In calculating $\nabla f$, you didn't use the spherical coordinate specific form... Is this because we don't care about the direction vectors in finding the stationary points, but just the magnitude? Aug21 awarded Editor Aug21 comment How do I find the relative extrema of a function in spherical coordinates? you're right, it was a typo Aug21 revised How do I find the relative extrema of a function in spherical coordinates? edited body Aug20 comment How do I find the relative extrema of a function in spherical coordinates? Yes, R is greater than zero Aug20 asked How do I find the relative extrema of a function in spherical coordinates? Jul23 awarded Tumbleweed Oct25 awarded Scholar Oct25 accepted Min,max distances between point and spherical surface Oct25 comment Min,max distances between point and spherical surface Could you please elaborate on some of this? I read up a bit on Lagrange Multipliers; I get that I want to constrain the solution. I don't really know how to go from four points on the surface to constraints defining the projected bounding box. Oct25 awarded Student Oct25 asked Min,max distances between point and spherical surface