Is there a way to find all analytic functions $f:\mathbb{R} \to \mathbb{R}$ which are a solution of the functional equation (where $f^{-1}$ denotes inverse of the function) $$f^{-1}(-x)=-f(x)$$ with the additional condition $$\left. \frac{df}{dx} \right|_{x=0}=1?$$
2026-03-29 05:49:44.1774763384
Functional equation $f^{-1}(-x) = -f(x)$
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