Cardinal of differentiable functions
65953
Cardinality of the set of differentiable functions
43874
Differentiability implies continuity - A question about the proof
41557
Most general $A \subseteq \mathbb R$ to define derivative of $f: A \to \mathbb R$?
72115
Why isn't there a continuously differentiable surjection from $I \to I \times I$?
157378
On an injective ring homomorphism from the ring of continuous functions to the ring of differentiable functions
80650
Complex differentiability of $f(z)=|z|$
91123
A convex function is differentiable at all but countably many points
53809
Continuous map of differentiable manifolds is differentiable if differentiable functions pull back to differentiable functions
71260
Check differentiability of multivariable functions
49587
Does a differentiable everywhere function have a continuous derivative?
42900
Locally continuously differentiable implies locally Lipschitz
154881
Question on differentiability of a continuous function
122003
From the limit definition of differentiability, determine where the function $f(x) = \sqrt{x}$ is differentiable?
42942
Finding the number of analytic functions which vanish only on a given set.
127114
Differentiability implying continuity
85623
Proof of continuity implied by differentiability
64197
Subgradients of non-convex functions