can you please provide me as many bivariate functions $f(x,y)$ which are increasing both in $x$ and $y$ and are convex (result into concave isoquants)? I need them not to be additive between $x$ and $y$, e.g. $f(x,y) = x^2 + y^2$ does not work
2026-03-29 22:27:03.1774823223
Can you name multiplicative bivariate convex functions?
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