21. However, not every G�teaux differentiable function is Fr�chet differentiable. 22. However, not every G�teaux differentiable function is Fr�chet differentiable . 23. Indeed, fractal geometries allow to study such non-differentiable paths. 24. The term differentiable so that the LRMC is well defined. 25. The irregularities never smooth out, as they do for differentiable curves. 26. Suppose for simplicitly that f : K \ to K is continuously differentiable . 27. As such, the curl operator maps continuously differentiable functions to continuous functions. 28. Microeconomic theory typically begins with the study of a single rational and differentiable . 29. A simple proof assuming differentiable utility functions and production functions is the following. 30. The technical disadvantage of the Haar wavelet is that it is not differentiable .