Does anyone have any example, where
a function that is both non-proximable and non-smooth (in particular, non-Lipschitz continuous gradient)?
2026-03-25 07:40:26.1774424426
Any function that is non-proximable and non-smooth?
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You do not deliver a definition of "proximable", but I suspect that the function $$ x \mapsto (f(x), g(x))$$ is neither proximable or smooth if $f$ is not proximable and $g$ is not smooth.