The elasticity of a differentiable function $f(x)$ is defined as:
$\varepsilon(x) = \frac{x}{f(x)}f'(x)$
What is the general form of this definition for N-dimensions, i.e., where $\vec{x}$ is a vector instead?
The elasticity of a differentiable function $f(x)$ is defined as:
$\varepsilon(x) = \frac{x}{f(x)}f'(x)$
What is the general form of this definition for N-dimensions, i.e., where $\vec{x}$ is a vector instead?
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