Is it possible/correct notation to write the limits $$\lim_{x \rightarrow 0^{-}}f(x)$$ $$\lim_{x \rightarrow 0^{+}}f(x)$$ as $$f_{+}(0)$$ $$f_{-}(0)$$ respectively, for a function $f(x)$?
2026-04-28 16:20:52.1777393252
Is $f_{+}(0)$ proper limit notation?
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One could misinterpret it as the positive or negative part of $f$. The version $f(0\pm)$ is more common.