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Results tagged with real-analysis
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user 20491
Real-valued functions of real variable, analytic properties of functions and sequences, limits, continuity, smoothness of these.
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$f^3,f^2$ are the cube and quadratic of f respectively and both infinite differentiable on $...
Let $f$ be a real function with domain R.
If $f^2$ and $f^3$ are both infinitely differentiable on R,
how to prove $f$ is infinitely differentiable on R?
I have been thinking about this problem for a …
- 295