Friday, June 3, 2016

real analysis - Differentiable functions whose derivative is continuous

I am just confused on the structure of differentiable functions whose derivative is also continuous. How will that continuous function be? What extra restrictions one need to put so as to make a derivative of continuous function continuous? Given an arbitrary continuous function can we be able to say about the continuity of its derivative ? What are the properties of such functions?

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analysis - Injection, making bijection

I have injection $f \colon A \rightarrow B$ and I want to get bijection. Can I just resting codomain to $f(A)$? I know that every function i...