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Example of a Monotonic, Everywhere Differentiable Function on ℝ Whose Derivative Is not ...

https://doi.org/10.4169/amer.math.monthly.120.06.566 https://www.jstor.org/stable/10.4169/amer.math.monthly.120.06.566 Abstract We construct an example of a monotonic ...
JSTOR Daily

Continuously Differentiable Curves Detect Limits of Functions of Two Variables

https://doi.org/10.4169/college.math.j.45.1.054 https://www.jstor.org/stable/10.4169/college.math.j.45.1.054 Summary We present a result of Rosenthal, which shows ...