Let $g(x,y)=|\sqrt{x^2-y^2}|$, how to (rigorously) show $g$ is not differentiable everywhere on the line $x=y$ and $x=-y$.
2026-04-09 00:22:18.1775694138
differentiability if function of two variables
33 Views Asked by Bumbble Comm https://math.techqa.club/user/bumbble-comm/detail AtRelated Questions in CALCULUS
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